Household and similar electrical appliances - Safety - Part 2-74: Particular requirements for portable immersion heaters

IEC 60335-2-74:2002+A1:2006+A2:2009 Deals with the safety of portable electric immersion heaters, their rated voltage voltage being not more than 250 V, for household and similar purposes. Also includes appliances intended for use by laymen in shops, in light industry and on farms. This consolidated version consists of the second edition (2002), its amendment 1 (2006) and its amendment 2 (2009). Therefore, no need to order amendments in addition to this publication.
This publication is to be read in conjunction with  IEC 60335-1:2006.

Appareils électrodomestiques et analogues - Sécurité - Partie 2-74: Règles particulières pour les thermoplongeurs mobiles

La CEI 60335-2-74:2002+A1:2006+A2:2009 Traite de la sécurité des thermoplongeurs mobiles électriques pour usages domestiques et analogues dont la tension assignée n'est pas supérieure à 250 V. Inclus aussi les appareils destinés à être utilisés par des usagers non avertis dans des magasins, chez des artisans et dans des fermes.  Cette version consolidée comprend la deuxième édition (2002), son amendement 1 (2006) et son amendement 2 (2009). Il n'est donc pas nécessaire de commander les amendements avec cette publication.
Cette publication doit être lue conjointement avec la  CEI 60335-1:2006.

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Status
Published
Publication Date
24-Nov-2009
Current Stage
PPUB - Publication issued
Start Date
25-Nov-2009
Completion Date
25-Nov-2009
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IEC 60335-2-74
Edition 2.2 2009-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-74: Particular requirements for portable immersion heaters
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-74: Règles particulières pour les thermoplongeurs mobiles
IEC 60335-2-74:2002+A1:2006+A2:2009
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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---------------------- Page: 2 ----------------------
IEC 60335-2-74
Edition 2.2 2009-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-74: Particular requirements for portable immersion heaters
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-74: Règles particulières pour les thermoplongeurs mobiles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX
ICS 13.120; 97.040.50 ISBN 978-2-88910-165-8
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – 60335-2-74 © IEC:2002+A1:2006
+A2:2009
CONTENTS

FOREWORD...........................................................................................................................3

INTRODUCTION.....................................................................................................................5

1 Scope...............................................................................................................................6

2 Normative references.......................................................................................................6

3 Definitions........................................................................................................................6

4 General requirement.........................................................................................................7

5 General conditions for the tests ........................................................................................7

6 Classification....................................................................................................................7

7 Marking and instructions...................................................................................................7

8 Protection against access to live parts..............................................................................7

9 Starting of motor-operated appliances ..............................................................................8

10 Power input and current ...................................................................................................8

11 Heating............................................................................................................................8

12 Void ...............................................................................................................................8

13 Leakage current and electric strength at operating temperature........................................8

14 Transient overvoltages .....................................................................................................8

15 Moisture resistance..........................................................................................................8

16 Leakage current and electric strength...............................................................................8

17 Overload protection of transformers and associated circuits .............................................8

18 Endurance........................................................................................................................8

19 Abnormal operation..........................................................................................................9

20 Stability and mechanical hazards .....................................................................................9

21 Mechanical strength.........................................................................................................9

22 Construction.....................................................................................................................9

23 Internal wiring...................................................................................................................9

24 Components.....................................................................................................................9

25 Supply connection and external flexible cords ................................................................10

26 Terminals for external conductors...................................................................................10

27 Provision for earthing .....................................................................................................10

28 Screws and connections .................................................................................................10

29 Clearances, creepage distances and solid insulation ......................................................10

30 Resistance to heat and fire.............................................................................................10

31 Resistance to rusting......................................................................................................10

32 Radiation, toxicity and similar hazards............................................................................10

Annexes ...............................................................................................................................

Bibliography..........................................................................................................................

---------------------- Page: 4 ----------------------
60335-2-74 © IEC:2002+A1:2006 – 3 –
+A2:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––––
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-74: Particular requirements for portable immersion 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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

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 60335-2-74 consists of the second edition (2002)

[documents 61/2177/FDIS and 61/2258/RVD], its amendment 1 (2006) [documents

61/2962/CDV and 61/3028/RVC] and its amendment 2 (2009) [documents 61/3867/FDIS and

61/3913/RVD].

The technical content is therefore identical to the base edition and its amendments and has

been prepared for user convenience.
It bears the edition number 2.2.

A vertical line in the margin shows where the base publication has been modified by

amendments 1 and 2.
The French version of this standard has not been voted upon.
---------------------- Page: 5 ----------------------
– 4 – 60335-2-74 © IEC:2002+A1:2006
+A2:2009

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 portable electric

immersion 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.

– 19.2: The test is carried out with the appliance suspended by its supply cord (Poland).

– Clause 21: The additional test is only carried out on appliances with a non-metallic enclosure (USA).

– 24.101: This requirement is not applicable (USA).

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 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.

---------------------- Page: 6 ----------------------
60335-2-74 © IEC:2002+A1:2006 – 5 –
+A2:2009
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.
---------------------- Page: 7 ----------------------
– 6 – 60335-2-74 © IEC:2002+A1:2006
+A2:2009
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-74: Particular requirements for portable immersion heaters
1 Scope
This clause of Part 1 is replaced by the following.

This International Standard deals with the safety of portable electric immersion heaters for

household and similar purposes, their rated voltage being not more than 250 V.

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

– for appliances 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;

– appliances intended to be used in locations where special conditions prevail, such as the presence of a

corrosive or explosive atmosphere (dust, vapour or gas);

– heating elements incorporated in portable appliances, such as appliances for heating liquids

(IEC 60335-2-15);
– aquarium heaters (IEC 60335-2-55);
– fixed immersion heaters (IEC 60335-2-73).
2 Normative references
This clause of Part 1 is applicable.
3 Definitions
This clause of Part 1 is applicable except as follows.
---------------------- Page: 8 ----------------------
60335-2-74 © IEC:2002+A1:2006 – 7 –
+A2:2009
3.1.9 Replacement:
normal operation

operation of the appliance in a vessel filled with water to the minimum depth of immersion

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.
5.3 Addition:
The additional test of 21.1 is carried out before the tests of Clause 8.
6 Classification
This clause of Part 1 is applicable except as follows.
6.2 Addition:
Immersion heaters shall be at least IPX7.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances shall be marked with the maximum and minimum depths of immersion.

NOTE 101 The depths of immersion may be indicated by lines only, provided that they are explained in the

instructions.
NOTE 102 The marking is not required on appliances intended to float.
7.12 Addition:
The instructions shall include the substance of the following:
– details of suitable vessels to be used;
– unplug the immersion heater before removing it from the liquid;

– after unplugging, the heating element will remain hot and should not be touched or placed

on combustible surfaces.

The instructions shall state that the appliance is not intended to be operated by means of an

external timer or a separate remote-control system.
8 Protection against access to live parts
This clause of Part 1 is applicable.
---------------------- Page: 9 ----------------------
– 8 – 60335-2-74 © IEC:2002+A1:2006
+A2:2009
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.
11 Heating
This clause of Part 1 is applicable except as follows.
11.7 Addition:

Appliances are operated for 15 min after the water temperature has reached 95 °C. However, if

this temperature cannot be attained, the immersion heater is operated for 15 min after the

water temperature has stabilized, or for 15 min after a thermal control has operated.

12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable.
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.
---------------------- Page: 10 ----------------------
60335-2-74 © IEC:2002+A1:2006 – 9 –
+A2:2009
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Addition:

Only appliances intended to prevent water from freezing in animal troughs are subjected to

the tests of 19.4 and 19.5.
19.2 Addition:

Appliances are placed on the floor of the test corner in the most unfavourable position.

19.13 Addition:

A temperature rise of 200 K is allowed during the first minute of operation for the walls and

floor of the test corner.
20 Stability and mechanical hazards
This clause of Part 1 is applicable.
21 Mechanical strength
This clause of Part 1 is applicable except as follows.
21.1 Addition:

The appliance is dropped from a height of 1 m onto a hardwood board having a thickness of

50 mm. It is dropped four times, once on the handle, once on the end of the heating element

and twice from a horizontal position.
22 Construction
This clause of Part 1 is applicable.
23 Internal wiring
This clause of Part 1 is applicable.
24 Components
This clause of Part 1 is applicable except as follows.

24.101 Thermal cut-outs incorporated in appliances in order to comply with Clause 19 shall

not be self-resetting.
Compliance is checked by inspection.
---------------------- Page: 11 ----------------------
– 10 – 60335-2-74 © IEC:2002+A1:2006
+A2:2009
25 Supply connection and external flexible cords
This clause of Part 1 is applicable except as follows.
25.5 Modification:
Appliances shall not be fitted with type X attachments.
Type Z attachment is allowed.
26 Terminals for external conductors
This clause of Part 1 is applicable.
27 Provision for earthing
This clause of Part 1 is applicable.
28 Screws and connections
This clause of Part 1 is applicable.
29 Clearances, creepage distances and solid insulation
This clause of Part 1 is applicable.
30 Resistance to heat and fire
This clause of Part 1 is applicable except as follows.
30.2 Addition:

For appliances intended to prevent water from freezing in animal troughs, 30.2.3 is applicable.

For other appliances, 30.2.2 is applicable.
31 Resistance to rusting
This clause of Part 1 is applicable.
32 Radiation, toxicity and similar hazards
This clause of Part 1 is applicable.
---------------------- Page: 12 ----------------------
60335-2-74 © IEC:2002+A1:2006 – 11 –
+A2:2009
Annexes
The annexes of Part 1 are applicable.
Bibliography
The bibliography of Part 1 is applicable except as follows.
Addition:

IEC 60335-2-15, Household and similar electrical appliances – Safety – Part 2-15: Particular

requirements for appliances for heating liquids

IEC 60335-2-55, Household and similar electrical appliances – Safety – Part 2-55: Particular

requirements for electrical appliances for use with aquariums and garden pools

IEC 60335-2-73, Household and similar electrical appliances – Safety – Part 2-73: Particular

requirements for fixed immersion heaters

ISO 13732-1, Ergonomics of the thermal environment – Methods for the assessment of human

responses to contact with surfaces – Part 1: Hot surfaces
___________
---------------------- Page: 13 ----------------------
– 12 – 60335-2-74 © CEI:2002+A1:2006
+A2:2009
SOMMAIRE

AVANT-PROPOS..................................................................................................................13

INTRODUCTION...................................................................................................................15

1 Domaine d’application....................................................................................................16

2 Références normatives...................................................................................................16

3 Définitions......................................................................................................................16

4 Prescriptions générales..................................................................................................17

5 Conditions générales d’essais ........................................................................................17

6 Classification..................................................................................................................17

7 Marquage et instructions ................................................................................................17

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............................................................................................................................18

13 Courant de fuite et rigidité diélectrique à la température de régime ................

...

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