Household and similar electrical appliances - Safety - Part 2-61: Particular requirements for thermal storage room heaters

Deals with the safety of electric thermal-storage room heaters intended to heat the room in which they are located, their rated voltage being not more than 250 V for single phase and 480 V for other appliances.

Appareils électrodomestiques et analogues - Sécurité - Partie 2-61: Règles particulières pour les appareils de chauffage à accumulation

Traite de la sécurité des appareils de chauffage électriques à accumulation pour usages domestiques et analogues, destinés à chauffer la pièce dans laquelle ils sont situés, dont la tension assignée n'est pas supérieure à 250 V pour les appareils monophasés et à 480 V pour les autres appareils.

General Information

Status
Published
Publication Date
08-Oct-2002
Current Stage
DELPUB - Deleted Publication
Start Date
12-Sep-2024
Completion Date
23-Jun-2023
Ref Project

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Standards Content (Sample)


INTERNATIONAL IEC
STANDARD
60335-2-61
Second edition
2002-10
Household and similar electrical appliances –
Safety –
Part 2-61:
Particular requirements for thermal-storage
room heaters
Appareils électrodomestiques et analogues –
Sécurité –
Partie 2-61:
Règles particulières pour les appareils de chauffage à
accumulation
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,
edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
Further information on IEC publications
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology. Information relating to
this publication, including its validity, is available in the IEC Catalogue of
publications (see below) in addition to new editions, amendments and corrigenda.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is also available from the following:
• IEC Web Site (www.iec.ch)
• Catalogue of IEC publications
The on-line catalogue on the IEC web site (http://www.iec.ch/searchpub/cur_fut.htm)
enables you to search by a variety of criteria including text searches, technical
committees and date of publication. On-line information is also available on
recently issued publications, withdrawn and replaced publications, as well as
corrigenda.
• IEC Just Published
This summary of recently issued publications (http://www.iec.ch/online_news/
justpub/jp_entry.htm) is also available by email. Please contact the Customer
Service Centre (see below) for further information.
• Customer Service Centre
If you have any questions regarding this publication or need further assistance,
please contact the Customer Service Centre:
Email: custserv@iec.ch
Tel: +41 22 919 02 11
Fax: +41 22 919 03 00
INTERNATIONAL IEC
STANDARD
60335-2-61
Second edition
2002-10
Household and similar electrical appliances –
Safety –
Part 2-61:
Particular requirements for thermal-storage
room heaters
Appareils électrodomestiques et analogues –
Sécurité –
Partie 2-61:
Règles particulières pour les appareils de chauffage à
accumulation
 IEC 2002  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
R
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 60335-2-61  IEC:2002(E)
CONTENTS
FOREWORD . 3
INTRODUCTION .5
1 Scope . 6
2 Normative references. 6
3 Definitions . 7
4 General requirement . 7
5 General conditions for the tests . 7
6 Classification . 8
7 Marking and instructions . 8
8 Protection against access to live parts . 9
9 Starting of motor-operated appliances . 9
10 Power input and current.10
11 Heating.10
12 Void .12
13 Leakage current and electric strength at operating temperature .12
14 Transient overvoltages.12
15 Moisture resistance.12
16 Leakage current and electric strength .12
17 Overload protection of transformers and associated circuits.12
18 Endurance .13
19 Abnormal operation.13
20 Stability and mechanical hazards.14
21 Mechanical strength.15
22 Construction .15
23 Internal wiring.16
24 Components .16
25 Supply connection and external flexible cords.16
26 Terminals for external conductors .17
27 Provision for earthing.17
28 Screws and connections .17
29 Clearances, creepage distances and solid insulation .17
30 Resistance to heat and fire .17
31 Resistance to rusting .17
32 Radiation, toxicity and similar hazards .17
Annexes.19
Bibliography.19
Figure 101 – Device for determining the air temperature rise .18
Table 101 – Temperature rises of surfaces .12

60335-2-61  IEC:2002(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––––
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-61: Particular requirements for thermal-storage room heaters
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
This part of International Standard IEC 60335 has been prepared by IEC technical committee
61: Safety of household and similar electrical appliances.
This second edition cancels and replaces the first edition published in 1992 and its
amendment 1 (2000).
The text of this part of IEC 60335 is based on the following documents:
FDIS Report on voting
61/2173/FDIS 61/2254/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electric thermal-
storage room heaters.
– 4 – 60335-2-61  IEC:2002(E)
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states "addition", "modification", or "replacement",
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The committee has decided that the contents of this publication will remain unchanged until
2004. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
The following differences exist in the countries indicated below.
– 7.1: All thermal-storage room heaters have to be marked with a warning against covering (Sweden).
A bilingual version of this publication may be issued at a later date.

60335-2-61  IEC:2002(E) – 5 –
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions. It also covers abnormal
situations that can be expected in practice.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
– 6 – 60335-2-61  IEC:2002(E)
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-61: Particular requirements for thermal-storage room heaters
1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric thermal-storage room heaters
for household and similar purposes that are intended to heat the room in which they are
located, their rated voltage being not more than 250 V for single-phase appliances and 480 V
for other appliances.
Appliances not intended for normal household use but which nevertheless may be a source of
danger to the public, such as appliances intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by
appliances that are encountered by all persons in and around the home. However, in general,
it does not take into account:
– the use of appliances by young children or infirm persons without supervision;
– playing with the appliance by young children.
NOTE 101 Attention is drawn to the fact that
– this standard only applies to self-contained thermal-storage room heaters. However, it may be used as a
guide, in so far as it reasonably applies, to determine the requirements and test specifications for other
thermal-storage room heaters;
– for heaters incorporating direct-acting heating elements, IEC 60335-2-30 is also applicable;
– for heaters intended to be used in vehicles or on board ships or aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 102 This standard does not apply to
– appliances intended exclusively for industrial purposes;
– heaters incorporated in the building structure;
– central heating systems;
– heaters for saunas (IEC 60335-2-53);
– flexible sheet heating elements for room heating (IEC 60335-2-96);
– heaters intended to be used in locations where special conditions prevail, such as the presence of a corrosive
or explosive atmosphere (dust, vapour or gas).
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-30, Household and similar electrical appliances – Safety – Part 2-30: Particular
requirements for room heaters
60335-2-61  IEC:2002(E) – 7 –
3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions
The heater is operated in cycles, each cycle having a duration of 24 h and consisting of a
charging period and a discharging period. The charging period is terminated when all heating
elements are disconnected for the first time by the devices controlling the temperature of the
core (charge controls).
3.101
thermal-storage room heater
heater constructed to store heat obtained from electrical energy in a heat-accumulating core
and to discharge it at any time
3.102
controlled-output heater
thermal-storage room heater, the heat output of which can be controlled by means such as
fans, shutters or flaps
3.103
free-output heater
thermal-storage room heater, the heat output of which is discharged by natural convection
and radiation and can only be varied by adjusting the charge
3.104
rated charging period
longest uninterrupted charging period assigned to the heater by the manufacturer
3.105
rated charge
energy consumption assigned to the heater by the manufacturer for a rated charging period
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.5 Addition:
For controlled-output heaters having auxiliary air-outlets, air is discharged only through the
main outlet into the room where the heater is situated.
NOTE 101 Movable parts include accessories supplied with the heater, such as shelves and humidifiers.
5.6 Addition:
Thermostats sensitive to the room air temperature, such as those having a sensing element
located in the air-inlet, are short-circuited.

– 8 – 60335-2-61  IEC:2002(E)
5.9 Addition:
When it is specified that direct-acting heating elements are operated together with the storage
heating elements, this only applies if allowed by the construction.
6 Classification
The clause of Part 1 is applicable except as follows.
6.1 Modification:
Thermal-storage room heaters shall be class I, class II or class III.
7 Marking and instructions
The clause of Part 1 is applicable except as follows.
7.1 Modification:
Appliances shall be marked with rated power input.
Addition:
Appliances shall be marked with
–the rated charging period, in hours;
– the mass of the assembled appliance, in kilograms.
For appliances provided with more than one means of connection to the supply, each supply
circuit shall be marked with rated voltage, rated power input and the symbol for nature of
supply.
Appliances shall be marked with “Do not cover” or with symbol 5641 of IEC 60417-1 if the
temperature rises determined during the tests of Clause 19 exceed the limits specified in
Clause 11.
7.6 Addition:
[symbol 5641 of IEC 60417-1] do not cover
7.10 Addition:
Charging controls shall not be marked with the off position unless they have a contact
separation in all poles to provide full disconnection under overvoltage category III conditions.
7.12 Addition:
The instructions shall be given on a durable card or in a booklet and shall include the
substance of the following:
60335-2-61  IEC:2002(E) – 9 –
– these instructions should be retained for future reference;
– fumes may be emitted during the first few operations of the heater and the room should be
kept well ventilated.
The instructions shall also include
–the rated charge;
– the minimum distance to be maintained between the heater and combustible materials,
such as furniture and curtains.
If the temperature rises determined during the tests of Clause 19 exceed the limits specified
in Clause 11, the instructions shall include the substance of the following:
–do not cover;
– do not place objects in contact with the heater.
If symbol 5641 of IEC 60417-1 is marked on the appliance, its meaning shall be explained.
7.12.1 Addition:
The installation instructions shall include the substance of the following:
– the installation of the heater should be carried out by trained personnel;
– if, during reassembly of the heater, a part of the thermal insulation shows damage or
deterioration, it should be replaced by an identical part;
– to maintain stability, it is essential that the heater is placed on a level surface and care
should be taken to avoid irregular surfaces, such as may result from carpets or tile
...


INTERNATIONAL IEC
STANDARD 60335-2-61
Edition 2.1
2005-06
Edition 2:2002 consolidated with amendment 1:2005
Household and similar electrical appliances –
Safety –
Part 2-61:
Particular requirements for thermal-storage
room heaters
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the

60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,

edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the

base publication incorporating amendment 1 and the base publication incorporating

amendments 1 and 2.
Further information on IEC publications
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology. Information relating to
this publication, including its validity, is available in the IEC Catalogue of
publications (see below) in addition to new editions, amendments and corrigenda.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is also available from the following:
• IEC Web Site (www.iec.ch)
• Catalogue of IEC publications
The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to
search by a variety of criteria including text searches, technical committees
and date of publication. On-line information is also available on recently issued
publications, withdrawn and replaced publications, as well as corrigenda.
• IEC Just Published
This summary of recently issued publications (www.iec.ch/online_news/ justpub)
is also available by email. Please contact the Customer Service Centre (see
below) for further information.
• Customer Service Centre
If you have any questions regarding this publication or need further assistance,
please contact the Customer Service Centre:

Email: custserv@iec.ch
Tel: +41 22 919 02 11
Fax: +41 22 919 03 00
INTERNATIONAL IEC
STANDARD 60335-2-61
Edition 2.1
2005-06
Edition 2:2002 consolidated with amendment 1:2005

Household and similar electrical appliances –
Safety –
Part 2-61:
Particular requirements for thermal-storage
room heaters
 IEC 2005  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
CF
For price, see current catalogue

– 2 – 60335-2-61  IEC:2002+A1:2005(E)

CONTENTS
FOREWORD.3

INTRODUCTION.5

1 Scope.6

2 Normative references.7

3 Definitions.7

4 General requirement.7

5 General conditions for the tests .8
6 Classification.8
7 Marking and instructions.8
8 Protection against access to live parts.10
9 Starting of motor-operated appliances .10
10 Power input and current .10
11 Heating.11
12 Void .12
13 Leakage current and electric strength at operating temperature.12
14 Transient overvoltages .13
15 Moisture resistance.13
16 Leakage current and electric strength.13
17 Overload protection of transformers and associated circuits .13
18 Endurance.13
19 Abnormal operation.13
20 Stability and mechanical hazards .15
21 Mechanical strength .16
22 Construction.16
23 Internal wiring.17
24 Components.17
25 Supply connection and external flexible cords .17
26 Terminals for external conductors.17
27 Provision for earthing .17
28 Screws and connections .18

29 Clearances, creepage distances and solid insulation .18
30 Resistance to heat and fire.18
31 Resistance to rusting.18
32 Radiation, toxicity and similar hazards.18

Annexes .20
Annex AA (informative) Immediate surrounds of air-outlet grilles .20

Bibliography.21

Figure 101 – Device for determining the air temperature rise .19

Table 101 – Temperature rises of surfaces .12

60335-2-61  IEC:2002+A1:2005(E) – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-61: Particular requirements for thermal-storage room heaters

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

This part of International Standard IEC 60335 has been prepared by IEC technical committee 61:
Safety of household and similar electrical appliances.
This consolidated version of IEC 60335-2-61 is based on the second edition (2002)
[documents 61/2173/FDIS and 61/2254/RVD] and its amendment 1 (2005) [documents
61/2814/FDIS and 61/2854/RVD].
It bears the edition number 2.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
– 4 – 60335-2-61  IEC:2002+A1:2005(E)

This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) of that standard.

NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.

This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electric thermal-
storage room heaters.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states "addition", "modification", or "replacement",

the relevant text in Part 1 is to be adapted accordingly.

NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.

NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The following differences exist in the countries indicated below.
– 7.1: All thermal-storage room heaters have to be marked with a warning against covering (Sweden).
A bilingual version of this publication may be issued at a later date.

60335-2-61  IEC:2002+A1:2005(E) – 5 –

INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its

provisions is entrusted to appropriately qualified and experienced persons.

This standard recognizes the internationally accepted level of protection against hazards such

as electrical, mechanical, thermal, fire and radiation of appliances when operated as in

normal use taking into account the manufacturer's instructions. It also covers abnormal

situations that can be expected in practice and takes into account the way in which

electromagnetic phenomena can affect the safe operation of appliances.

This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
– 6 – 60335-2-61  IEC:2002+A1:2005(E)

HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-61: Particular requirements for thermal-storage room heaters

1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric thermal-storage room heaters
for household and similar purposes that are intended to heat the room in which they are
located, their rated voltage being not more than 250 V for single-phase appliances and 480 V
for other appliances.
Appliances not intended for normal household use but which nevertheless may be a source of
danger to the public, such as appliances intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by
appliances that are encountered by all persons in and around the home. However, in general,
it does not take into account:
– the use of appliances by young children or infirm persons without supervision;
– playing with the appliance by young children.
NOTE 101 Attention is drawn to the fact that
– this standard only applies to self-contained thermal-storage room heaters. However, it may be used as a
guide, in so far as it reasonably applies, to determine the requirements and test specifications for other
thermal-storage room heaters;
– for heaters incorporating direct-acting heating elements, IEC 60335-2-30 is also applicable;
– for heaters intended to be used in vehicles or on board ships or aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 102 This standard does not apply to
– appliances intended exclusively for industrial purposes;
– heaters incorporated in the building structure;

– central heating systems;
– heaters for saunas (IEC 60335-2-53);
– flexible sheet heating elements for room heating (IEC 60335-2-96);
– heaters intended to be used in locations where special conditions prevail, such as the presence of a corrosive
or explosive atmosphere (dust, vapour or gas).

60335-2-61  IEC:2002+A1:2005(E) – 7 –

2 Normative references
This clause of Part 1 is applicable except as follows.

Addition:
IEC 60335-2-30, Household and similar electrical appliances – Safety – Part 2-30: Particular

requirements for room heaters
ISO 3864-1, Graphical symbols – Safety colours and safety signs – Part 1: Design principles

for safety signs in workplaces and public areas
3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions
The heater is operated in cycles, each cycle having a duration of 24 h and consisting of a
charging period and a discharging period. The charging period is terminated when all heating
elements are disconnected for the first time by the devices controlling the temperature of the
core (charge controls).
3.101
thermal-storage room heater
heater constructed to store heat obtained from electrical energy in a heat-accumulating core
and to discharge it at any time
3.102
controlled-output heater
thermal-storage room heater, the heat output of which can be controlled by means such as
fans, shutters or flaps
3.103
free-output heater
thermal-storage room heater, the heat output of which is discharged by natural convection
and radiation and can only be varied by adjusting the charge

3.104
rated charging period
longest uninterrupted charging period assigned to the heater by the manufacturer
3.105
rated charge
energy consumption assigned to the heater by the manufacturer for a rated charging period
4 General requirement
This clause of Part 1 is applicable.

– 8 – 60335-2-61  IEC:2002+A1:2005(E)

5 General conditions for the tests

This clause of Part 1 is applicable except as follows.

5.5 Addition:
For controlled-output heaters having auxiliary air-outlets, air is discharged only through the

main outlet into the room where the heater is situated.

NOTE 101 Movable parts include accessories supplied with the heater, such as shelves and humidifiers.

5.6 Addition:
Thermostats sensitive to the room air temperature, such as those having a sensing element
located in the air-inlet, are short-circuited.
5.9 Addition:
When it is specified that direct-acting heating elements are operated together with the storage
heating elements, this only applies if allowed by the construction.
6 Classification
The clause of Part 1 is applicable except as follows.
6.1 Modification:
Thermal-storage room heaters shall be class I, class II or class III.
7 Marking and instructions
The clause of Part 1 is applicable except as follows.
7.1 Modification:
Appliances shall be marked with rated power input.
Addition:
Appliances shall be marked with
– the rated charging period, in hours;
– the mass of the assembled appliance, in kilograms.
For appliances provided with more than one means of connection to the supply, each supply
circuit shall be marked with rated voltage, rated power input and the symbol for nature of
supply.
60335-2-61  IEC:2002+A1:2005(E) – 9 –

If the tempera
...


NORME CEI
INTERNATIONALE
IEC
60335-2-61
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2002-10
Appareils électrodomestiques et analogues –
Sécurité –
Partie 2-61:
Règles particulières pour les appareils
de chauffage à accumulation
Household and similar electrical appliances –
Safety –
Part 2-61:
Particular requirements for thermal storage
room heaters
Numéro de référence
Reference number
CEI/IEC 60335-2-61:2002
Numérotation des publications Publication numbering
Depuis le 1er janvier 1997, les publications de la CEI As from 1 January 1997 all IEC publications are
sont numérotées à partir de 60000. Ainsi, la CEI 34-1 issued with a designation in the 60000 series. For
devient la CEI 60034-1. example, IEC 34-1 is now referred to as IEC 60034-1.
Editions consolidées Consolidated editions
Les versions consolidées de certaines publications de la The IEC is now publishing consolidated versions of its
CEI incorporant les amendements sont disponibles. Par publications. For example, edition numbers 1.0, 1.1
exemple, les numéros d’édition 1.0, 1.1 et 1.2 indiquent and 1.2 refer, respectively, to the base publication,
respectivement la publication de base, la publication de the base publication incorporating amendment 1 and
base incorporant l’amendement 1, et la publication de the base publication incorporating amendments 1
base incorporant les amendements 1 et 2. and 2.
Informations supplémentaires Further information on IEC publications
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Le contenu technique des publications de la CEI est The technical content of IEC publications is kept
constamment revu par la CEI afin qu'il reflète l'état under constant review by the IEC, thus ensuring that
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nibles dans le Catalogue des publications de la CEI available in the IEC Catalogue of publications
(voir ci-dessous) en plus des nouvelles éditions, (see below) in addition to new editions, amendments
amendements et corrigenda. Des informations sur les and corrigenda. Information on the subjects under
sujets à l’étude et l’avancement des travaux entrepris consideration and work in progress undertaken by the
par le comité d’études qui a élaboré cette publication, technical committee which has prepared this
ainsi que la liste des publications parues, sont publication, as well as the list of publications issued,
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NORME CEI
INTERNATIONALE
IEC
60335-2-61
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2002-10
Appareils électrodomestiques et analogues –
Sécurité –
Partie 2-61:
Règles particulières pour les appareils
de chauffage à accumulation
Household and similar electrical appliances –
Safety –
Part 2-61:
Particular requirements for thermal storage
room heaters
 IEC 2002 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

– 2 – 60335-2-61  CEI:2005
SOMMAIRE
AVANT-PROPOS.4
INTRODUCTION.8
1 Domaine d’application .10
2 Références normatives.10
3 Définitions .12
4 Exigences générales .12
5 Conditions générales d’essais .12
6 Classification.14
7 Marquage et instructions .14
8 Protection contre l’accès aux parties actives .18
9 Démarrage des appareils à moteur.18
10 Puissance et courant .18
11 Echauffements .18
12 Vacant.22
13 Courant de fuite et rigidité diélectrique à la température de régime .22
14 Surtensions transitoires.22
15 Résistance à l’humidité.22
16 Courant de fuite et rigidité diélectrique .24
17 Protection contre la surcharge des transformateurs et des circuits associés.24
18 Endurance.24
19 Fonctionnement anormal .24
20 Stabilité et dangers mécaniques .28
21 Résistance mécanique .28
22 Construction .28
23 Conducteurs internes .30
24 Composants .32
25 Raccordement au réseau et câbles souples extérieurs .32
26 Bornes pour conducteurs externes .32
27 Dispositions en vue de la mise à la terre .32
28 Vis et connexions .32
29 Distances dans l'air, lignes de fuite et isolation solide .32
30 Résistance à la chaleur et au feu.32
31 Protection contre la rouille.34
32 Rayonnement, toxicité et dangers analogues.34

Annexes .38
Bibliographie.38

Figure 101 – Dispositif pour déterminer l’échauffement de l’air .36

Tableau 101 – Echauffement des surfaces.22

60335-2-61  IEC:2005 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.9
1 Scope.11
2 Normative references .11
3 Definitions .13
4 General requirement.13
5 General conditions for the tests .13
6 Classification.15
7 Marking and instructions.15
8 Protection against access to live parts.19
9 Starting of motor-operated appliances .19
10 Power input and current .19
11 Heating .19
12 Void.23
13 Leakage current and electric strength at operating temperature.23
14 Transient overvoltages .23
15 Moisture resistance .23
16 Leakage current and electric strength.25
17 Overload protection of transformers and associated circuits .25
18 Endurance.25
19 Abnormal operation .25
20 Stability and mechanical hazards .29
21 Mechanical strength .29
22 Construction .29
23 Internal wiring.31
24 Components .33
25 Supply connection and external flexible cords .33
26 Terminals for external conductors.33
27 Provision for earthing .33
28 Screws and connections .33
29 Clearances, creepage distances and solid insulation .33
30 Resistance to heat and fire.33
31 Resistance to rusting.35
32 Radiation, toxicity and similar hazards.35

Annexes .39
Bibliography.39

Figure 101 – Device for determining the air temperature rise .37

Table 101 – Temperature rises of surfaces .23

– 4 – 60335-2-61  CEI:2005
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
___________
APPAREILS ÉLECTRODOMESTIQUES ET ANALOGUES
SÉCURITÉ –
Partie 2-61: Règles particulières pour les appareils
de chauffage à accumulation
AVANT-PROPOS
1) La Commission Electrotechnique Internationale (CEI) est une organisation mondiale de normalisation
composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a
pour objet de favoriser la coopération internationale pour toutes les questions de normalisation dans les
domaines de l'électricité et de l'électronique. A cet effet, la CEI – entre autres activités – publie des Normes
internationales, des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au
public (PAS) et des Guides (ci-après dénommés "Publication(s) de la CEI"). Leur élaboration est confiée à des
comités d'études, aux travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les
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également aux travaux. La CEI collabore étroitement avec l'Organisation Internationale de Normalisation (ISO),
selon des conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de la CEI concernant les questions techniques représentent, dans la mesure
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toute autre Publication de la CEI, ou au crédit qui lui est accordé.
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La présente partie de la Norme internationale CEI 60335 a été établie par le comité d'études
61 de la CEI: Sécurité des appareils électrodomestiques et analogues.
Cette seconde édition annule et remplace la première édition parue en 1992 et son
amendement 1 (2000).
Cette version bilingue (2005-09) remplace la version monolingue anglaise.
Le texte anglais de cette norme est issu des documents 61/2173/FDIS et 61/2254/RVD. Le
rapport de vote 61/2254/RVD donne toute information sur le vote ayant abouti à l’approbation
de cette norme.
60335-2-61  IEC:2005 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––––
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-61: Particular requirements for thermal-storage room heaters

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This part of International Standard IEC 60335 has been prepared by IEC technical committee 61:
Safety of household and similar electrical appliances.
This second edition cancels and replaces the first edition published in 1992 and its
amendment 1 (2000).
This bilingual version (2005-09) replaces the English version.
The text of this part of IEC 60335 is based on the following documents:
FDIS Report on voting
61/2173/FDIS 61/2254/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 6 – 60335-2-61  CEI:2005
La version française de cette norme n’a pas été soumise au vote.
La présente partie 2 doit être utilisée conjointement avec la dernière édition de la CEI 60335-1
et ses amendements. Elle a été établie sur la base de la quatrième édition (2001) de cette
norme.
NOTE 1 L’expression «Partie 1» utilisée dans la présente norme fait référence à la CEI 60335-1.
La présente partie 2 complète ou modifie les articles correspondants de la CEI 60335-1 de
façon à transformer cette publication en norme CEI : Règles de sécurité pour les appareils de
chauffage électriques à accumulation
Lorsqu'un paragraphe particulier de la Partie 1 n'est pas mentionné dans cette partie 2, ce
paragraphe s'applique pour autant qu’il soit raisonnable. Lorsque la présente norme spécifie
«addition», «modification» ou «remplacement», le texte correspondant de la Partie 1 doit être
adapté en conséquence.
NOTE 2 Le système de numérotation suivant est utilisé:
– paragraphes, tableaux et figures: ceux qui sont numérotés à partir de 101 sont complémentaires à ceux
de la Partie 1;
– notes: à l’exception de celles qui sont dans un nouveau paragraphe ou de celles qui concernent des notes
de la Partie 1, les notes sont numérotées à partir de 101, y compris celles des articles ou paragraphes qui
sont modifiés ou remplacés;
– annexes: les annexes supplémentaires sont appelées AA, BB, etc.
NOTE 3 Les caractères d'imprimerie suivants sont utilisés:
– exigences : caractères romains;
– modalités d'essais: caractères italiques;
– notes: petits caractères romains.
Les mots en gras dans le texte sont définis à l'Article 3. Lorsqu'une définition concerne un adjectif, l'adjectif et le
nom associé figurent également en gras.
Les différences suivantes existent dans les pays indiqués ci-après.
– 7.1: Tous les appareils de chauffage à accumulation doivent porter un marquage contre le recouvrement
(Suède).
Le comité a décidé que le contenu de cette publication ne sera pas modifié avant la date de
maintenance indiquée sur le site web de la CEI sous «http://webstore.iec.ch» dans les
données relatives à la publication recherchée. A cette date, la publication sera
• reconduite;
• supprimée;
• remplacée par une édition révisée, ou
• amendée.
60335-2-61  IEC:2005 – 7 –
The French version of this standard has not been voted upon.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electric thermal-
storage room heaters.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states "addition", "modification", or "replacement",
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The following differences exist in the countries indicated below.
– 7.1: All thermal-storage room heaters have to be marked with a warning against covering (Sweden).

The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
– 8 – 60335-2-61  CEI:2005
INTRODUCTION
Il a été considéré en établissant la présente Norme internationale que l'exécution de ses dis-
positions était confiée à des personnes expérimentées et ayant une qualification appropriée.
Cette norme reconnaît le niveau de protection internationalement accepté contre les risques
électriques, mécaniques, thermiques, liés au feu et au rayonnement des appareils, lorsqu'ils
fonctionnent comme en usage normal en tenant compte des instructions du fabricant. Elle
couvre également les situations anormales auxquelles on peut s'attendre dans la pratique.
Cette norme tient compte autant que possible des exigences de la CEI 60364, de façon à
rester compatible avec les règles d'installation quand l’appareil est raccordé au réseau
d’alimentation. Cependant, des règles nationales d'installation peuvent être différentes.
Si un appareil compris dans le domaine d’application de cette norme comporte également des
fonctions qui sont couvertes par une autre partie 2 de la CEI 60335, la partie 2
correspondante est appliquée à chaque fonction séparément, dans la limite du raisonnable. Si
cela est applicable, on tient compte de l’influence d’une fonction sur les autres fonctions.
Cette norme est une norme de famille de produits traitant de la sécurité d’appareils et a
préséance sur les normes horizontales et génériques couvrant le même sujet.
Un appareil conforme au texte de la présente norme ne sera pas nécessairement jugé
conforme aux principes de sécurité de la norme si, lorsqu'il est examiné et soumis aux essais,
il apparaît qu'il présente d'autres caractéristiques qui compromettent le niveau de sécurité
visé par ces exigences.
Un appareil utilisant des matériaux ou présentant des modes de construction différents de
ceux décrits dans les exigences de cette norme peut être examiné et essayé en fonction de
l'objectif poursuivi par ces exigences et, s'il est jugé pratiquement équivalent, il peut être
estimé conforme aux principes de sécurité de la norme.

60335-2-61  IEC:2005 – 9 –
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions. It also covers abnormal
situations that can be expected in practice.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
– 10 – 60335-2-61  CEI:2005
APPAREILS ÉLECTRODOMESTIQUES ET ANALOGUES
SÉCURITÉ –
Partie 2-61: Règles particulières pour les appareils
de chauffage à accumulation
1 Domaine d’application
L’article de la Partie 1 est remplacé par l’article ci-après.
La présente Norme internationale traite de la sécurité des appareils de chauffage
électriques à accumulation pour usages domestiques et analogues, destinés à chauffer la
pièce dans laquelle ils sont situés, dont la tension assignée n'est pas supérieure à 250 V
pour les appareils monophasés et à 480 V pour les autres appareils.
Les appareils non destinés à un usage domestique normal, mais qui peuvent néanmoins
constituer une source de danger pour le public, tels que les appareils destinés à être utilisés
par des usagers non avertis dans des magasins, chez des artisans et dans des fermes, sont
compris dans le domaine d'application de la présente norme.
Dans la mesure du possible, la présente norme traite des risques ordinaires présentés par les
appareils, encourus par tout individu à l'intérieur et autour de l'habitation. Cependant, cette
norme ne tient en général pas compte:
– de l'utilisation des appareils par des jeunes enfants ou des personnes handicapées, sans
surveillance;
– de l’emploi de l’appareil comme jouet par des jeunes enfants.
NOTE 101 L’attention est attirée sur le fait que
– cette norme ne s’applique qu’aux appareils de chauffage à accumulation autonomes. Toutefois, elle peut
être utilisée comme un guide, pour autant qu’elle puisse raisonnablement s’appliquer, pour déterminer les
exigences et les spécifications d’essais applicables aux autres appareils de chauffage à accumulation;
– pour les appareils comportant des éléments de chauffage direct, la CEI 60335-2-30 est également applicable;
– pour les appareils destinés à être utilisés dans des véhicules ou à bord de navires ou d'avions, des exigences
supplémentaires peuvent être nécessaires;
– dans de nombreux pays, des exigences supplémentaires sont spécifiées par les organismes nationaux de la
santé publique, par les organismes nationaux responsables de la protection des travailleurs et par des
organismes analogues.
NOTE 102 La présente norme ne s’applique pas
– aux appareils destinés exclusivement à des usages industriels;
– aux appareils de chauffage incorporés dans la structure des bâtiments;
– aux systèmes de chauffage central;
– aux appareils de chauffage pour saunas (CEI 60335-2-53);
– aux films souples chauffants pour le chauffage des locaux (CEI 60335-2-96);
– aux appareils de chauffage à accumulation destinés à être utilisés dans les locaux présentant des conditions
particulières telles que la présence d'une atmosphère corrosive ou explosive (poussière, vapeur ou gaz).
2 Références normatives
L’article de la Partie 1 est applicable avec l’exception suivante.
Addition:
CEI 60335-2-30, Appareils électrodomestiques et analogues – Sécurité – Partie 2-30: Règles
particulières pour les appareils de chauffage des locaux

60335-2-61  IEC:2005 – 11 –
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-61: Particular requirements for thermal-storage room heaters

1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric thermal-storage room heaters
for household and similar purposes that are intended to heat the room in which they are
located, their rated voltage being not more than 250 V for single-phase appliances and 480 V
for other appliances.
Appliances not intended for normal household use but which nevertheless may be a source of
danger to the public, such as appliances intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by
appliances that are encountered by all persons in and around the home. However, in general,
it does not take into account:
– the use of appliances by young children or infirm persons without supervision;
– playing with the appliance by young children.
NOTE 101 Attention is drawn to the fact that
– this standard only applies to self-contained thermal-storage room heaters. However, it may be used as a
guide, in so far as it reasonably applies, to determine the requirements and test specifications for other
thermal-storage room heaters;
– for heaters incorporating direct-acting heating elements, IEC 60335-2-30 is also applicable;
– for heaters intended to be used in vehicles or on board ships or aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 102 This standard does not apply to
– appliances intended exclusively for industrial purposes;
– heaters incorporated in the building structure;
– central heating systems;
– heaters for saunas (IEC 60335-2-53);
– flexible sheet heating elements for room heating (IEC 60335-2-96);
– heaters intended to be used in locations where special conditions prevail, such as the presence of a corrosive
or explosive atmosphere (dust, vapour or gas).
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-30, Household and similar electrical appliances – Safety – Part 2-30: Particular
requirements for room heaters
– 12 – 60335-2-61  CEI:2005
3 Définitions
L’article de la Partie 1 est applicable avec l’exception suivante.
3.1.9 Remplacement:
conditions de fonctionnement normal
fonctionnement de l’appareil dans les conditions suivantes
L’appareil est mis en fonctionnement suivant des cycles, chaque cycle ayant une durée de
24 h et comprenant une période de charge et une période de décharge. La période de charge
est terminée lorsque tous les éléments chauffants sont déconnectés pour la première fois par
des dispositifs commandant la température du noyau (dispositifs de commande de charge)
3.101
appareil de chauffage à accumulation
appareil de chauffage construit pour accumuler de la chaleur obtenue à partir de l’énergie
électrique dans un noyau accumulateur de chaleur et pour la restituer à tout moment
3.102
appareil à décharge réglable
appareil de chauffage à accumulation dont le flux thermique peut être commandé par des
moyens tels que des ventilateurs, des clapets ou des registres
3.103
appareil à décharge non réglable
appareil de chauffage à accumulation, dont le flux thermique est dégagé par convection
naturelle et par rayonnement et qui ne peut être modifié que par un réglage de la charge
3.104
temps assigné de charge
période de charge la plus longue ininterrompue assignée à l’appareil par le fabricant
3.105
charge assignée
consommation d’énergie électrique assignée à l’appareil par le fabricant pour le temps
assigné de charge
4 Exigences générales
L’article de la Partie 1 est applicable.
5 Conditions générales d’essais
L’article de la Partie 1 est applicable avec l’exception suivante.
5.5 Addition:
Pour les appareils à décharge réglables munis de sorties d’air auxiliaires, les essais sont,
en général, effectués seulement lorsque l’air est dégagé par la sortie d’air principale dans la
pièce où est situé l’appareil.
NOTE 101 L’expression «partie mobile» inclut les accessoires fournis avec les appareils de chauffage, tels que
les étagères et les humidificateurs.

60335-2-61  IEC:2005 – 13 –
3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions
The heater is operated in cycles, each cycle having a duration of 24 h and consisting of a
charging period and a discharging period. The charging period is terminated when all heating
elements are disconnected for the first time by the devices controlling the temperature of the
core (charge controls).
3.101
thermal-storage room heater
heater constructed to store heat obtained from electrical energy in a heat-accumulating core
and to discharge it at any time
3.102
controlled-output heater
thermal-storage room heater, the heat output of which can be controlled by means such as
fans, shutters or flaps
3.103
free-output heater
thermal-storage room heater, the heat output of which is discharged by natural convection
and radiation and can only be varied by adjusting the charge
3.104
rated charging period
longest uninterrupted charging period assigned to the heater by the manufacturer
3.105
rated charge
energy consumption assigned to the heater by the manufacturer for a rated charging period
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.5 Addition:
For controlled-output heaters having auxiliary air-outlets, air is discharged only through the
main outlet into the room where the heater is situated.
NOTE 101 Movable parts include accessories supplied with the heater, such as shelves and humidifiers.

– 14 – 60335-2-61  CEI:2005
5.6 Addition:
Les thermostats sensibles à la température ambiante de la pièce, tels que ceux dont
l’élément sensible se trouve dans l’entrée d’air, sont court-circuités.
5.9 Addition:
Lorsqu’il est spécifié que des éléments de chauffage direct sont mis en fonctionnement en
même temps que des éléments de chauffage à accumulation, cela ne s’applique que si la
construction le permet.
6 Classification
L’article de la Partie 1 est applicable avec les exceptions suivantes.
6.1 Modification:
Les appareils de chauffage à accumulation doivent être de la classe I, de la classe II ou
de la classe III.
7 Marquage et instructions
L’article de la Partie 1 est applicable avec les exceptions suivantes.
7.1 Modification:
Les appareils doivent porter l’indication de la puissance assignée.
Addition:
Les appareils doivent porter les indications suivantes:
– le temps assigné de charge, en heures;
– la masse de l’appareil assemblé, en kilogrammes.
Pour les appareils munis de plusieurs moyens de raccordement à l’alimentation, chaque
circuit d’alimentation doit porter l’indication de la tension assignée, de la puissance
assignée et le symbole de la nature du courant.
Les appareils doivent porter l’avertissement «Ne pas couvrir» ou le symbole 5641 de la
CEI 60417-1 si les échauffements déterminés au cours des essais de l’Article 19 dépassent
les limites spécifiées à l’Article 11.
7.6 Addition:
[symbole 5641 de la CEI 60417-1] ne pas couvrir

7.10 Addition:
Les dispositifs de commande de charge ne doivent pas porter l’indication de la position arrêt
à moins qu’ils ne comportent une séparation des contacts sur tous les pôles pour assurer une
coupure totale dans des conditions de surtension de la catégorie III.

60335-2-61  IEC:2005 – 15 –
5.6 Addition:
Thermostats sensitive to the room air temperature, such as those having a sensing element
located in the air-inlet, are short-circuited.
5.9 Addition:
When it is specified that direct-acting heating elements are operated together with the storage
heating elements, this only applies if allowed by the construction.
6 Classification
The clause of Part 1 is applicable except as follows.
6.1 Modification:
Thermal-storage room heaters shall be class I, class II or class III.
7 Marking and instructions
The clause of Part 1 is applicable except as follows.
7.1 Modification:
Appliances shall be marked with rated power input.
Addition:
Appliances shall be marked with
– the rated charging period, in hours;
– the mass of the assembled appliance, in kilograms.
For appliances provided with more than one means of connection to the supply, each supply
circuit shall be marked with rated voltage, rated power input and the symbol for nature of
supply.
Appliances shall be marked with “Do not cover” or with symbol 5641 of IEC 60417-1 if the
temperature rises determined during the tests of Clause
...


IEC 60335-2-61
Edition 2.1 2005-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-61: Particular requirements for thermal storage room heaters

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-61: Règles particulières pour les appareils de chauffage à accumulation

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IEC 60335-2-61
Edition 2.1 2005-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-61: Particular requirements for thermal storage room heaters

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-61: Règles particulières pour les appareils de chauffage à accumulation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CF
CODE PRIX
ICS 13.120; 97.100.10 ISBN 2-8318- 8206-0

– 2 – 60335-2-61  CEI:2002+A1:2005

SOMMAIRE
AVANT-PROPOS.4

INTRODUCTION.8

1 Domaine d’application .10

2 Références normatives.12

3 Définitions .12

4 Exigences générales .12

5 Conditions générales d’essais .14

6 Classification.14
7 Marquage et instructions .14
8 Protection contre l’accès aux parties actives .18
9 Démarrage des appareils à moteur.18
10 Puissance et courant .18
11 Echauffements .20
12 Vacant.24
13 Courant de fuite et rigidité diélectrique à la température de régime .24
14 Surtensions transitoires.24
15 Résistance à l’humidité.24
16 Courant de fuite et rigidité diélectrique .24
17 Protection contre la surcharge des transformateurs et des circuits associés.24
18 Endurance.24
19 Fonctionnement anormal .24
20 Stabilité et dangers mécaniques .28
21 Résistance mécanique .30
22 Construction .30
23 Conducteurs internes .32
24 Composants .32
25 Raccordement au réseau et câbles souples extérieurs .32
26 Bornes pour conducteurs externes .34
27 Dispositions en vue de la mise à la terre .34
28 Vis et connexions .34
29 Distances dans l'air, lignes de fuite et isolation solide .34

30 Résistance à la chaleur et au feu.34
31 Protection contre la rouille.34
32 Rayonnement, toxicité et dangers analogues.34

Annexes .38
Annexe AA (informative) Entourages immédiats des grilles de sortie d'air .38

Bibliographie.39

Figure 101 – Dispositif pour déterminer l’échauffement de l’air .36

Tableau 101 – Echauffement des surfaces.22

60335-2-61  IEC:2002+A1:2005 – 3 –

CONTENTS
FOREWORD.5

INTRODUCTION.9

1 Scope.11

2 Normative references.13

3 Definitions.13

4 General requirement.13

5 General conditions for the tests .15

6 Classification.15
7 Marking and instructions.15
8 Protection against access to live parts.19
9 Starting of motor-operated appliances .19
10 Power input and current .19
11 Heating.21
12 Void .25
13 Leakage current and electric strength at operating temperature.25
14 Transient overvoltages .25
15 Moisture resistance.25
16 Leakage current and electric strength.25
17 Overload protection of transformers and associated circuits .25
18 Endurance.25
19 Abnormal operation.25
20 Stability and mechanical hazards .29
21 Mechanical strength .31
22 Construction.31
23 Internal wiring.33
24 Components.33
25 Supply connection and external flexible cords .33
26 Terminals for external conductors.35
27 Provision for earthing .35
28 Screws and connections .35
29 Clearances, creepage distances and solid insulation .35

30 Resistance to heat and fire.35
31 Resistance to rusting.35
32 Radiation, toxicity and similar hazards.35

Annexes .39
Annex AA (informative) Immediate surrounds of air-outlet grilles .39

Bibliography.41

Figure 101 – Device for determining the air temperature rise .37

Table 101 – Temperature rises of surfaces .23

– 4 – 60335-2-61 © CEI:2002+A1:2005

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE

___________
APPAREILS ÉLECTRODOMESTIQUES ET ANALOGUES

SÉCURITÉ –
Partie 2-61: Règles particulières pour les appareils

de chauffage à accumulation
AVANT-PROPOS
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La présente partie de la Norme internationale CEI 60335 a été établie par le comité d'études 61
de la CEI: Sécurité des appareils électrodomestiques et analogues.
La présente version consolidée de la CEI 60335-2-61 comprend la deuxième édition (2002)
[documents 61/2173/FDIS et 61/2254/RVD] et son amendement 1 (2005) [documents
61/2814/FDIS et 61/2854/RVD].
Le contenu technique de cette version consolidée est donc identique à celui de l'édition de
base et à son amendement; cette version a été préparée par commodité pour l'utilisateur.
Elle porte le numéro d'édition 2.1.
Une ligne verticale dans la marge indique où la publication de base a été modifiée par
l'amendement 1.
La version française de cette norme n’a pas été soumise au vote.

60335-2-61 © IEC:2002+A1:2005 – 5 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-61: Particular requirements for thermal-storage room heaters

FOREWORD
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expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

This part of International Standard IEC 60335 has been prepared by IEC technical committee 61:
Safety of household and similar electrical appliances.
This consolidated version of IEC 60335-2-61 consists of the second edition (2002)
[documents 61/2173/FDIS and 61/2254/RVD] and its amendment 1 (2005) [documents
61/2814/FDIS and 61/2854/RVD].
The technical content is therefore identical to the base edition and its amendment and has
been prepared for user convenience.
It bears the edition number 2.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
The French version of this standard has not been voted upon.

– 6 – 60335-2-61  CEI:2002+A1:2005

Cette version bilingue (2005-09) remplace la version monolingue anglaise.

La présente partie 2 doit être utilisée conjointement avec la dernière édition de la CEI 60335-1
et ses amendements. Elle a été établie sur la base de la quatrième édition (2001) de cette
norme.
NOTE 1 L’expression «Partie 1» utilisée dans la présente norme fait référence à la CEI 60335-1.

La présente partie 2 complète ou modifie les articles correspondants de la CEI 60335-1 de

façon à transformer cette publication en norme CEI : Règles de sécurité pour les appareils de
chauffage électriques à accumulation

Lorsqu'un paragraphe particulier de la Partie 1 n'est pas mentionné dans cette partie 2, ce
paragraphe s'applique pour autant qu’il soit raisonnable. Lorsque la présente norme spécifie
«addition», «modification» ou «remplacement», le texte correspondant de la Partie 1 doit être
adapté en conséquence.
NOTE 2 Le système de numérotation suivant est utilisé:
– paragraphes, tableaux et figures: ceux qui sont numérotés à partir de 101 sont complémentaires à ceux de la
Partie 1;
– notes: à l’exception de celles qui sont dans un nouveau paragraphe ou de celles qui concernent des notes de
la Partie 1, les notes sont numérotées à partir de 101, y compris celles des articles ou paragraphes qui sont
modifiés ou remplacés;
– annexes: les annexes supplémentaires sont appelées AA, BB, etc.
NOTE 3 Les caractères d'imprimerie suivants sont utilisés:
– exigences : caractères romains;
– modalités d'essais: caractères italiques;
– notes: petits caractères romains.
Les mots en gras dans le texte sont définis à l'Article 3. Lorsqu'une définition concerne un adjectif, l'adjectif et le
nom associé figurent également en gras.
Les différences suivantes existent dans les pays indiqués ci-après.
– 7.1: Tous les appareils de chauffage à accumulation doivent porter un marquage contre le recouvrement
(Suède).
Le comité a décidé que le contenu de la publication de base et de ses amendements ne sera
pas modifié avant la date de maintenance indiquée sur le site web de la CEI sous
"http://webstore.iec.ch" dans les données relatives à la publication recherchée. A cette date,
la publication sera
• reconduite,
• supprimée,
• remplacée par une édition révisée, ou
• amendée.
60335-2-61  IEC:2002+A1:2005 – 7 –

This bilingual version (2005-09) replaces the English version.

This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) of that standard.

NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.

This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to

convert that publication into the IEC standard: Safety requirements for electric thermal-

storage room heaters.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states "addition", "modification", or "replacement",
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The following differences exist in the countries indicated below.
– 7.1: All thermal-storage room heaters have to be marked with a warning against covering (Sweden).
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 8 – 60335-2-61  CEI:2002+A1:2005

INTRODUCTION
Il a été considéré en établissant la présente Norme internationale que l'exécution de ses dis-

positions était confiée à des personnes expérimentées et ayant une qualification appropriée.

Cette norme reconnaît le niveau de protection internationalement accepté contre les risques

électriques, mécaniques, thermiques, liés au feu et au rayonnement des appareils, lorsqu'ils

fonctionnent comme en usage normal en tenant compte des instructions du fabricant. Elle

couvre également les situations anormales auxquelles on peut s'attendre dans la pratique et

prend en considération les phénomènes électromagnétiques qui peuvent affecter le

fonctionnement en toute sécurité des appareils.

Cette norme tient compte autant que possible des exigences de la CEI 60364, de façon à
rester compatible avec les règles d'installation quand l’appareil est raccordé au réseau
d’alimentation. Cependant, des règles nationales d'installation peuvent être différentes.
Si un appareil compris dans le domaine d’application de cette norme comporte également des
fonctions qui sont couvertes par une autre partie 2 de la CEI 60335, la partie 2
correspondante est appliquée à chaque fonction séparément, dans la limite du raisonnable. Si
cela est applicable, on tient compte de l’influence d’une fonction sur les autres fonctions.
Cette norme est une norme de famille de produits traitant de la sécurité d’appareils et a
préséance sur les normes horizontales et génériques couvrant le même sujet.
Un appareil conforme au texte de la présente norme ne sera pas nécessairement jugé
conforme aux principes de sécurité de la norme si, lorsqu'il est examiné et soumis aux essais,
il apparaît qu'il présente d'autres caractéristiques qui compromettent le niveau de sécurité
visé par ces exigences.
Un appareil utilisant des matériaux ou présentant des modes de construction différents de
ceux décrits dans les exigences de cette norme peut être examiné et essayé en fonction de
l'objectif poursuivi par ces exigences et, s'il est jugé pratiquement équivalent, il peut être
estimé conforme aux principes de sécurité de la norme.

60335-2-61  IEC:2002+A1:2005 – 9 –

INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its

provisions is entrusted to appropriately qualified and experienced persons.

This standard recognizes the internationally accepted level of protection against hazards such

as electrical, mechanical, thermal, fire and radiation of appliances when operated as in

normal use taking into account the manufacturer's instructions. It also covers abnormal

situations that can be expected in practice and takes into account the way in which

electromagnetic phenomena can affect the safe operation of appliances.

This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
– 10 – 60335-2-61  CEI:2002+A1:2005

APPAREILS ÉLECTRODOMESTIQUES ET ANALOGUES

SÉCURITÉ –
Partie 2-61: Règles particulières pour les appareils

de chauffage à accumulation
1 Domaine d’application
L’article de la Partie 1 est remplacé par l’article ci-après.
La présente Norme internationale traite de la sécurité des appareils de chauffage
électriques à accumulation pour usages domestiques et analogues, destinés à chauffer la
pièce dans laquelle ils sont situés, dont la tension assignée n'est pas supérieure à 250 V
pour les appareils monophasés et à 480 V pour les autres appareils.
Les appareils non destinés à un usage domestique normal, mais qui peuvent néanmoins
constituer une source de danger pour le public, tels que les appareils destinés à être utilisés
par des usagers non avertis dans des magasins, chez des artisans et dans des fermes, sont
compris dans le domaine d'application de la présente norme.
Dans la mesure du possible, la présente norme traite des risques ordinaires présentés par les
appareils, encourus par tout individu à l'intérieur et autour de l'habitation. Cependant, cette
norme ne tient en général pas compte:
– de l'utilisation des appareils par des jeunes enfants ou des personnes handicapées, sans
surveillance;
– de l’emploi de l’appareil comme jouet par des jeunes enfants.
NOTE 101 L’attention est attirée sur le fait que
– cette norme ne s’applique qu’aux appareils de chauffage à accumulation autonomes. Toutefois, elle peut
être utilisée comme un guide, pour autant qu’elle puisse raisonnablement s’appliquer, pour déterminer les
exigences et les spécifications d’essais applicables aux autres appareils de chauffage à accumulation;
– pour les appareils comportant des éléments de chauffage direct, la CEI 60335-2-30 est également applicable;
– pour les appareils destinés à être utilisés dans des véhicules ou à bord de navires ou d'avions, des exigences
supplémentaires peuvent être nécessaires;
– dans de nombreux pays, des exigences supplémentaires sont spécifiées par les organismes nationaux de la
santé publique, par les organismes nationaux responsables de la protection des travailleurs et par des
organismes analogues.
NOTE 102 La présente norme ne s’applique pas

– aux appareils destinés exclusivement à des usages industriels;
– aux appareils de chauffage incorporés dans la structure des bâtiments;
– aux systèmes de chauffage central;
– aux appareils de chauffage pour saunas (CEI 60335-2-53);
– aux films souples chauffants pour le chauffage des locaux (CEI 60335-2-96);
– aux appareils de chauffage à accumulation destinés à être utilisés dans les locaux présentant des conditions
particulières telles que la présence d'une atmosphère corrosive ou explosive (poussière, vapeur ou gaz).

60335-2-61  IEC:2002+A1:2005 – 11 –

HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-61: Particular requirements for thermal-storage room heaters

1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric thermal-storage room heaters
for household and similar purposes that are intended to heat the room in which they are
located, their rated voltage being not more than 250 V for single-phase appliances and 480 V
for other appliances.
Appliances not intended for normal household use but which nevertheless may be a source of
danger to the public, such as appliances intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by
appliances that are encountered by all persons in and around the home. However, in general,
it does not take into account:
– the use of appliances by young children or infirm persons without supervision;
– playing with the appliance by young children.
NOTE 101 Attention is drawn to the fact that
– this standard only applies to self-contained thermal-storage room heaters. However, it may be used as a
guide, in so far as it reasonably applies, to determine the requirements and test specifications for other
thermal-storage room heaters;
– for heaters incorporating direct-acting heating elements, IEC 60335-2-30 is also applicable;
– for heaters intended to be used in vehicles or on board ships or aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 102 This standard does not apply to
– appliances intended exclusively for industrial purposes;
– heaters incorporated in the building structure;

– central heating systems;
– heaters for saunas (IEC 60335-2-53);
– flexible sheet heating elements for room heating (IEC 60335-2-96);
– heaters intended to be used in locations where special conditions prevail, such as the presence of a corrosive
or explosive atmosphere (dust, vapour or gas).

– 12 – 60335-2-61  CEI:2002+A1:2005

2 Références normatives
L’article de la Partie 1 est applicable avec l’exception suivante.

Addition:
CEI 60335-2-30, Appareils électrodomestiques et analogues – Sécurité – Partie 2-30: Règles

particulières pour les appareils de chauffage des locaux

ISO 3864-1, Symboles graphiques – Couleurs de sécurité et signaux de sécurité – Partie 1:

Principes de conception pour les signaux de sécurité sur les lieux de travail et dans les lieux
publics
3 Définitions
L’article de la Partie 1 est applicable avec l’exception suivante.
3.1.9 Remplacement:
conditions de fonctionnement normal
fonctionnement de l’appareil dans les conditions suivantes
L’appareil est mis en fonctionnement suivant des cycles, chaque cycle ayant une durée de
24 h et comprenant une période de charge et une période de décharge. La période de charge
est terminée lorsque tous les éléments chauffants sont déconnectés pour la première fois par
des dispositifs commandant la température du noyau (dispositifs de commande de charge)
3.101
appareil de chauffage à accumulation
appareil de chauffage construit pour accumuler de la chaleur obtenue à partir de l’énergie
électrique dans un noyau accumulateur de chaleur et pour la restituer à tout moment
3.102
appareil à décharge réglable
appareil de chauffage à accumulation dont le flux thermique peut être commandé par des
moyens tels que des ventilateurs, des clapets ou des registres
3.103
appareil à décharge non réglable
appareil de chauffage à accumulation, dont le flux thermique est dégagé par convection
naturelle et par rayonnement et qui ne peut être modifié que par un réglage de la charge

3.104
temps assigné de charge
période de charge la plus longue ininterrompue assignée à l’appareil par le fabricant
3.105
charge assignée
consommation d’énergie électrique assignée à l’appareil par le fabricant pour le temps
assigné de charge
4 Exigences générales
L’article de la Partie 1 est applicable.

60335-2-61  IEC:2002+A1:2005 – 13 –

2 Normative references
This clause of Part 1 is applicable except as follows.

Addition:
IEC 60335-2-30, Household and similar electrical appliances – Safety – Part 2-30: Particular

requirements for room heaters
ISO 3864-1, Graphical symbols – Safety colours and safety signs – Part 1: Design principles

for safety signs in workplaces and public areas
3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions
The heater is operated in cycles, each cycle having a duration of 24 h and consisting of a
charging period and a discharging period. The charging period is terminated when all heating
elements are disconnected for the first time by the devices controlling the temperature of the
core (charge controls).
3.101
thermal-storage room heater
heater constructed to store heat obtained from electrical energy in a heat-accumulating core
and to discharge it at any time
3.102
controlled-output heater
thermal-storage room heater, the heat output of which can be controlled by means such as
fans, shutters or flaps
3.103
free-output heater
thermal-storage room heater, the heat output of which is discharged by natural convection
and radiation and can only be varied by adjusting the charge

3.104
rated charging period
longest uninterrupted charging period assigned to the heater by the manufacturer
3.105
rated charge
energy consumption assigned to the heater by the manufacturer for a rated charging period
4 General requirement
This clause of Part 1 is applicable.

– 14 – 60335-2-61  CEI:2002+A1:2005

5 Conditions générales d’essais

L’article de la Partie 1 est applicable avec l’exception suivante.

5.5 Addition:
Pour les appareils à décharge réglables munis de sorties d’air auxiliaires, les essais sont,

en général, effectués seulement lorsque l’air est dégagé par la sortie d’air principale dans la

pièce où est situé l’appareil.

NOTE 101 L’expression «partie mobile» inclut les accessoires fournis avec les appareils de chauffage, tels que
les étagères et les humidificateurs.
5.6 Addition:
Les thermostats sensibles à la température ambiante de la pièce, tels que ceux dont
l’élément sensible se trouve dans l’entrée d’air, sont court-circuités.
5.9 Addition:
Lorsqu’il est spécifié que des éléments de chauffage direct sont mis en fonctionnement en
même temps que des éléments de chauffage à accumulation, cela ne s’applique que si la
construction le permet.
6 Classification
L’article de la Partie 1 est applicable avec les exceptions suivantes.
6.1 Modification:
Les appareils de chauffage à accumulation doivent être de la classe I, de la classe II ou
de la classe III.
7 Marquage et instructions
L’article de la Partie 1 est applicable avec les exceptions suivantes.
7.1 Modification:
Les appareils doivent porter l’indication de la puissance assignée.
Addition:
Les appareils doivent porter les indications suivantes:
– le temps assigné de charge, en heures;
– la masse de l’appareil assemblé, en kilogrammes.
Pour les appareils munis de plusieurs moyens de raccordement à l’alimentation, chaque
circuit d’alimentation doit porter l’indication de la tension assignée, de la puissance
assignée et le symbole de la nature du courant.

60335-2-61  IEC:2002+A1:2005 – 15 –

5 General conditions for the tests

This clause of Part 1 is applicable except as follows.

5.5 Addition:
For controlled-output heaters having auxiliary air-outlets, air is discharged only through the

main outlet into the room where the heater is situated.

NOTE 101 Movable parts include accessories supplied with the heater, such as shelves and humidifiers.

5.6 Addition:
Thermostats sensitive to the room air temperature, such as those having a sensing element
located in the air-inlet, are short-circuited.
5.9 Addition:
When it is specified that direct-acting heating elements are operated together with the storage
heating elements, this only applies if allowed by the construction.
6 Classification
The clause of Part 1 is applicable except as follows.
6.1 Modification
...


IEC 60335-2-61 ®
Edition 2.2 2009-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-61: Particular requirements for thermal storage room heaters

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-61: Règles particulières pour les appareils de chauffage à accumulation

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IEC 60335-2-61 ®
Edition 2.2 2009-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –

Part 2-61: Particular requirements for thermal storage room heaters

Appareils électrodomestiques et analogues – Sécurité –

Partie 2-61: Règles particulières pour les appareils de chauffage à accumulation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120; 97.100.10 ISBN 2-8318-9977-X

– 2 – 60335-2-61 © IEC:2002+A1:2005
+A2:2008
CONTENTS
FOREWORD.5
INTRODUCTION.5
1 Scope.6
2 Normative references.7
3 Definitions.7
4 General requirement.7
5 General conditions for the tests .8
6 Classification.8
7 Marking and instructions.8
8 Protection against access to live parts.10
9 Starting of motor-operated appliances .10
10 Power input and current .10
11 Heating.11
12 Void .12
13 Leakage current and electric strength at operating temperature.12
14 Transient overvoltages .13
15 Moisture resistance.13
16 Leakage current and electric strength.13
17 Overload protection of transformers and associated circuits .13
18 Endurance.13
19 Abnormal operation.13
20 Stability and mechanical hazards .15
21 Mechanical strength.15
22 Construction.16
23 Internal wiring.17
24 Components.17
25 Supply connection and external flexible cords .17
26 Terminals for external conductors.17
27 Provision for earthing .17
28 Screws and connections .18
29 Clearances, creepage distances and solid insulation .18
30 Resistance to heat and fire.18
31 Resistance to rusting.18
32 Radiation, toxicity and similar hazards.18

Annexes .20
Annex AA (informative) Immediate surrounds of air-outlet grilles .20

Bibliography.

Figure 101 – Device for determining the air temperature rise .19

Table 101 – Temperature rises of surfaces .12

60335-2-61 © IEC:2002+A1:2005 – 3 –
+A2:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-61: Particular requirements for thermal-storage room heaters
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendments has
been prepared for user convenience.
IEC 60335-2-61 edition 2.2 contains the second edition (2002) [documents 61/2173/FDIS
and 61/2254/RVD], its amendment 1 (2005) [documents 61/2814/FDIS and 61/2854/RVD]
and its amendment 2 (2008) [documents 61/3642/FDIS and 61/3682/RVD].
A vertical line in the margin shows where the base publication has been modified by
amendments 1 and 2.
This part of International Standard IEC 60335 has been prepared by IEC technical committee
61: Safety of household and similar electrical appliances.
The French version of this standard has not been voted upon.

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This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electric thermal-
storage room heaters.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states "addition", "modification", or "replacement",
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The following differences exist in the countries indicated below.
– 7.1: All thermal-storage room heaters have to be marked with a warning against covering (Sweden).
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of the amendment 2 be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.

60335-2-61 © IEC:2002+A1:2005 – 5 –
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INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions. It also covers abnormal
situations that can be expected in practice and takes into account the way in which
electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
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HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-61: Particular requirements for thermal-storage room heaters

1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric thermal-storage room heaters
for household and similar purposes that are intended to heat the room in which they are
located, their rated voltage being not more than 250 V for single-phase appliances and 480 V
for other appliances.
Appliances not intended for normal household use but which nevertheless may be a source of
danger to the public, such as appliances intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by
appliances that are encountered by all persons in and around the home. However, in general,
it does not take into account:
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
NOTE 101 Attention is drawn to the fact that
– this standard only applies to self-contained thermal-storage room heaters. However, it may be used as a
guide, in so far as it reasonably applies, to determine the requirements and test specifications for other
thermal-storage room heaters;
– for heaters incorporating direct-acting heating elements, IEC 60335-2-30 is also applicable;
– for heaters intended to be used in vehicles or on board ships or aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 102 This standard does not apply to
– appliances intended exclusively for industrial purposes;
– heaters incorporated in the building structure;
– central heating systems;
– heaters for saunas (IEC 60335-2-53);
– flexible sheet heating elements for room heating (IEC 60335-2-96);
– heaters intended to be used in locations where special conditions prevail, such as the presence of a corrosive
or explosive atmosphere (dust, vapour or gas).

60335-2-61 © IEC:2002+A1:2005 – 7 –
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2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-30, Household and similar electrical appliances – Safety – Part 2-30: Particular
requirements for room heaters
ISO 3864-1, Graphical symbols – Safety colours and safety signs – Part 1: Design principles
for safety signs in workplaces and public areas
3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions
The heater is operated in cycles, each cycle having a duration of 24 h and consisting of a
charging period and a discharging period. The charging period is terminated when all heating
elements are disconnected for the first time by the devices controlling the temperature of the
core (charge controls).
3.101
thermal-storage room heater
heater constructed to store heat obtained from electrical energy in a heat-accumulating core
and to discharge it at any time
3.102
controlled-output heater
thermal-storage room heater, the heat output of which can be controlled by means such as
fans, shutters or flaps
3.103
free-output heater
thermal-storage room heater, the heat output of which is discharged by natural convection
and radiation and can only be varied by adjusting the charge
3.104
rated charging period
longest uninterrupted charging period assigned to the heater by the manufacturer
3.105
rated charge
energy consumption assigned to the heater by the manufacturer for a rated charging period
4 General requirement
This clause of Part 1 is applicable.

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5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.5 Addition:
For controlled-output heaters having auxiliary air-outlets, air is discharged only through the
main outlet into the room where the heater is situated.
NOTE 101 Movable parts include accessories supplied with the heater, such as shelves and humidifiers.
5.6 Addition:
Thermostats sensitive to the room air temperature, such as those having a sensing element
located in the air-inlet, are short-circuited.
5.9 Addition:
When it is specified that direct-acting heating elements are operated together with the storage
heating elements, this only applies if allowed by the construction.
6 Classification
The clause of Part 1 is applicable except as follows.
6.1 Modification:
Thermal-storage room heaters shall be class I, class II or class III.
7 Marking and instructions
The clause of Part 1 is applicable except as follows.
7.1 Modification:
Appliances shall be marked with rated power input.
Addition:
Appliances shall be marked with
– the rated charging period, in hours;
– the mass of the assembled appliance, in kilograms.
For appliances provided with more than one means of connection to the supply, each supply
circuit shall be marked with rated voltage, rated power input and the symbol for nature of
supply.
60335-2-61 © IEC:2002+A1:2005 – 9 –
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If the temperature rises determined during the tests of Clause 19 exceed the limits specified
in Clause 11, appliances shall be marked with symbol IEC 60417-5641 (DB:2002-10)
combined with the prohibition sign of ISO 3864-1, except for colours, or with the substance of
the following:
WARNING: Do not cover.
NOTE 101 This marking may be on a label that is permanently attached to the appliance.
7.6 Addition:
Do not cover
NOTE This symbol incorporates symbol IEC 60417-5641(DB:2002-10) combined with the prohibition sign of
ISO 3864-1, except for colours.
7.10 Addition:
Charging controls shall not be marked with the off position unless they have a contact
separation in all poles to provide full disconnection under overvoltage category III conditions.
However, disconnection of the neutral pole is not required for single phase appliances
permanently connected to a system with an earthed neutral (TN-S-C system).
7.12 Addition:
The instructions shall be given on a durable card or in a booklet and shall include the
substance of the following:
– these instructions should be retained for future reference;
– fumes may be emitted during the first few operations of the heater and the room should be
kept well ventilated.
The instructions shall also include
– the rated charge;
– the minimum distance to be maintained between the heater and combustible materials,
such as furniture and curtains.
If the temperature rises determined during the tests of Clause 19 exceed the limits specified
in Clause 11, the instructions shall include the substance of the following:
– do not cover;
– do not place objects in contact with the heater.
If the “Do not cover” symbol is marked on the appliance, its meaning shall be explained.
7.12.1 Addition:
The installation instructions shall include the substance of the following:
– the installation of the heater should be carried out by trained personnel;
– if, during reassembly of the heater, a part of the thermal insulation shows damage or
deterioration, it should be replaced by an identical part;

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– to maintain stability, it is essential that the heater is placed on a level surface and care
should be taken to avoid irregular surfaces, such as may result from carpets or tiled
surrounds partially protruding under the heater.
The installation instructions shall also include
– a circuit diagram with a clear indication of the terminals;
– details for fixing the heater to the floor or for fixing the heater to the wall, including the
minimum mounting height (if applicable).
7.14 Addition:
The height of the “Do not cover” symbol shall be at least 15 mm.
The height of the words “Do not cover” shall be at least 3 mm.
Compliance is checked by measurement.
7.15 Addition:
The marking concerning covering shall be visible after the heater has been installed.
8 Protection against access to live parts
This clause of Part 1 is applicable.
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is applicable except as follows.
10.1 Addition:
Heaters are installed as specified in 11.2.
The power input of the storage heating elements is measured during the charging period, any
fans, shutters, flaps and similar devices being adjusted to cause minimum heat discharge.
The power input of direct-acting heating elements is measured during a discharge period, any
fans, shutters, flaps and similar devices being adjusted to cause maximum heat discharge.
The total power input for each means of connection to the supply is measured with all controls
adjusted to the position resulting in the highest power input.
NOTE 101 For heaters incorporating motors, the tolerances specified for heating appliances apply.

60335-2-61 © IEC:2002+A1:2005 – 11 –
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10.101 The heater shall accept at least 100 % of the rated charge.
Compliance is checked by measuring the energy consumption for one rated charging period.
The heater is initially at room temperature and is operated at rated power input. Charge
controls, if adjustable by the user, are placed at the maximum setting. Any fans, shutters,
flaps and similar devices are adjusted to cause minimum heat discharge.
11 Heating
The clause of Part 1 is applicable except as follows.
11.2 Replacement:
Built-in appliances are built in.
Other heaters are placed in a test corner.
Dull black-painted plywood approximately 20 mm thick is used for the test corner and for the
installation of built-in heaters. The test corner extends at least 300 mm beyond the heater. A
wooden board, having a height of 120 mm and a thickness of 15 mm, is fixed along the full
length of the walls of the test corner and in contact with the floor.
Apertures on the underside of the heater that are within 25 mm of the floor are blocked.
Heaters are positioned in the test corner as follows:
– heaters normally used on a floor are placed on the floor as near to the walls as possible;
– heaters normally fixed to a wall are mounted on one of the walls, as near to the other wall
and to the floor as is likely, unless otherwise stated in the installation instructions.
If a stationary heater has an opening at floor level, a felt pad 20 mm thick is placed on the
floor and pushed without appreciable force into the opening as far as the construction will
permit. If a guard is provided or if the opening is too small to permit the entry of the pad, the
pad is pushed as close as possible against the opening.
NOTE The purpose of the felt pad is to simulate a carpet that might restrict the airflow.
A dull black-painted plywood block having dimensions of 75 mm x 75 mm x 20 mm is placed
on the floor of the test corner under the hottest part of the heater, if possible.
11.3 Addition:
The temperature rises of the felt pad and the plywood block are also determined by means of
thermocouples attached to the small blackened disks.
Thermocouples are placed on the surface of the felt pad and on the centre of the plywood
block.
11.6 Replacement:
Combined appliances are operated as heating appliances.

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11.7 Replacement:
Controlled-output heaters are subjected to three cycles of normal operation and free-
output heaters are subjected to two cycles of normal operation.
The heater is charged until the charge control operates for the first time.
For controlled-output heaters, during the discharge period for the first and third cycles of
operation, shutters, flaps and similar devices are adjusted to cause minimum heat discharge.
During this period, fans are operated at minimum speed or are switched off, if possible. For
the second cycle of operation, fans, shutters and similar devices are adjusted to cause
maximum heat discharge during the discharge period and are operated 15 min after the end
of the charging period.
If it is likely that higher temperature rises will result if fans, shutters, flaps and similar devices
are adjusted to cause intermediate heat discharge, an additional cycle of normal operation is
carried out under these conditions.
If direct-acting heating elements can be operated simultaneously, they are energised during
the test.
11.8 Addition:
In Table 3, heaters are considered liable to be operated continuously for long periods.
The temperature rises of surfaces of heaters shall not exceed the values shown in Table 101,
the measurements commencing 20 min after the end of the charging period.
Table 101 – Temperature rises of surfaces
Surface Temperature rise
K
a b
Air-outlet grilles and their immediate surrounds that are accessible to the test rod :
– heaters incorporating fans having the air-outlet grille located on the sides or front
of the heater
– other heaters 130
b
Other surfaces that are accessible to the test rod 85
Surface of the felt pad or plywood block 60
a
Immediate surrounds are the surfaces within a distance of 100 mm from the air-outlet grille measured vertically
above the openings and within a distance of 25 mm in the other directions. See Annex AA for typical cross-
sections of immediate surrounds of air-outlets.
b
The test rod is 75 mm in diameter, of unrestricted length and with a hemispherical end.

12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.1 Modification:
The tests are carried out at the end of the charging period of the last cycle of operation
specified in 11.7, before operation of the charge control.

60335-2-61 © IEC:2002+A1:2005 – 13 –
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The tests are also carried out with motors and direct-acting heating elements operating during
the discharge period.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.2 Addition:
For appliances having a horizontal surface at the top, 0,25 l of water containing approximately
1 % NaCl is poured over the top of the appliance during a period of 5 s.
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Modification:
Instead of the tests specified, appliances are subjected to the tests of 19.3, 19.11, 19.12
and 19.101.
Appliances incorporating motors are also subjected to the test of 19.7.
19.3 Replacement:
Appliances are operated as specified in Clause 11 but under the conditions of 19.3.101 to
19.3.104, the power input being 1,24 times rated power input.
19.3.101 Controlled-output heaters are subjected to one cycle of normal operation under
conditions of minimum heat discharge.

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19.3.102 Heaters are subjected to one cycle of normal operation under conditions of
maximum heat discharge.
During the discharge period, a woollen blanket having a specific mass of approximately
470 g/m² and having the same width as the heater is placed from the wall, over the top and
down the front of the heater.
NOTE The blanket between the wall and the heater is allowed to drop behind the heater. Care is to be taken to
ensure that the blanket is not held away from the front of the heater.
The temperature rise of the surface of the heater under the blanket is determined.
19.3.103 Heaters are subjected to one cycle of normal operation under conditions of
maximum heat discharge.
During the discharge period, a black-painted plywood board is placed in the most
unfavourable position against the front surface of the heater. The board has a thickness of
13 mm, its height is at least equal to the height of the heater and its width equal to 75 % of
the width of the heater or 60 cm, whichever is greater.
Direct-acting heating elements are in operation.
The temperature rise of the board is determined by means of thermocouples attached to the
back of small blackened disks of copper or brass 15 mm in diameter and 1 mm thick. The
front of the disk is flush with the surface of the board.
19.3.104 Heaters are subjected to one cycle of normal operation under conditions of
maximum heat discharge.
During the discharge period, a folded woollen blanket having a specific mass of approximately
470 g/m² is placed on top of the heater. The blanket has the same width as the length of the
heater and is folded into six thicknesses, each fold being equal in width to the distance from
the front of the heater to the wall.
The temperature rise of the surface of the heater under the blanket is determined.
The temperature rise of the air is determined, commencing 20 min after the end of the
charging period. The measurement is made at a distance of 10 mm from the air-outlet grille
using the device shown in Figure 101.
19.13 Addition:
During the tests of 19.3, the temperature rises of the plywood board and the surfaces of the
heater under the blanket shall not exceed 180 K.
The temperature rise of the air shall not exceed 180 K.
19.101 Appliances are operated under normal operation and supplied at rated voltage.
The following fault conditions are introduced one at a time for one cycle of operation, fans,
shutters, flaps and similar devices being adjusted to cause the most unfavourable conditions:
– interrupting one of the phases of the supply;
– short-circuiting any control that operates during the test of Clause 11;
– simulating failure of the air-mixing device in the most unfavourable position, unless it can
only fail in a safe position.
60335-2-61 © IEC:2002+A1:2005 – 15 –
+A2:2008
NOTE 1 Failure of the air-mixing device can be simulated by rendering the control inoperative. If the air-mixing
device is provided with more than one control, these are rendered inoperative in turn.
NOTE 2 The tests are limited to those conditions that may be expected to give the most unfavourable results.
During the test simulating failure of the air-mixing device, temperature rises shall not exceed
– for air-outlet grilles and immediate surrounds
• 180 K, for heaters incorporating fans and having the air-outlet grille located on the
front or sides,
• 180 K, for other heaters during the first 5 min and 155 K after this period;
– 140 K, for other external surfaces of the heater;
– 100 K, for the floor of the test corner.
19.102 Appliances provided with outlets to supply air to more than one room shall not be
damaged by a reverse airflow in any of the outlets or ducts.
The appliance is operated as specified for the first cycle of operation in 11.7 and supplied at
rated voltage. Air is injected at a pressure of 25 Pa to each air-outlet in turn, all other outlets
being closed and fans switched off. The test is carried out until steady conditions are
established.
The temperature rises shall not exceed
– 150 K, for surfaces of the heater;
– 60 K, for walls and floor of the test corner.
The heater shall not be damaged to such an extent that compliance with this standard is
impaired.
20 Stability and mechanical hazards
This clause of Part 1 is applicable except as follows.
20.1 Modification:
Instead of the test on the plane inclined at an angle of 15°, the appliance is placed on a
horizontal surface and a force of 200 N is applied to the top of the heater in the most
unfavourable horizontal direction.
The heater shall not overturn.
NOTE 101 Suitable means may be used to prevent the heater from sliding.
21 Mechanical strength
This clause of Part 1 is applicable except as follows.
21.1 Addition:
A mass of 80 kg is placed gently on the top of the heater over an area of 230 mm diameter.
There shall be no distortion of the enclosure to such an extent that compliance with this
standard is impaired.
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22 Construction
This clause of Part 1 is applicable except as follows.
22.17 Addition:
NOTE 101 The requirement only applies after the appliance has been installed.
22.101 Appliances shall be constructed so that compliance with this standard is not impaired
if objects are inserted through air-outlet grilles or heated particles from the heat-accumulating
core, thermal insulation or other material penetrates into air ducts within the heater.
Compliance is checked by inspection.
22.102 Appliances shall be constructed so that heating elements maintain their original
position during normal use. It shall not be possible for parts of a broken heating element to
fall out of the appliance or be blown through air-outlet grilles.
Compliance is checked by inspection.
22.103 Appliances shall be constructed so that it is not possible for molten or flaming
material to fall through the base of the heater.
Compliance is checked by inspection.
NOTE This requirement is considered to be met if the heating element cannot be seen through the base of the
heater.
22.104 Appliances shall be constructed so that the components can be easily assembled
during installation. The heat-accumulating core and the heating elements shall be arranged so
that they can be placed in position before making the internal connections.
Internal wiring and terminals shall be arranged and marked so that incorrect connections are
unlikely. If the internal connections are made by means of multiple-pin connectors, they shall
be polarized.
Compliance is checked by inspection and, if necessary, by assembling the heater.
22.105 Appliances shall be constructed to allow the resetting of thermal cut-outs and the
replacement of controls and heating elements without damaging thermal insulation.
Compliance is checked by inspection.
22.106 Appliances shall be constructed so that objects are prevented from falling or being
inserted behind the heater. Guards provided for this purpose shall not be more than 50 mm
below the top of the heater and not more than 50 mm from the sides.
These requirements do not apply if the heater is provided with spacers ensuring a distance of
at least 75 mm between the rear face of the heater and the wall.
The height of any recess provided for a skirting board shall not exceed 250 mm.
Compliance is checked by inspection and by measurement.

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