IEC 60335-2-74:2002

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

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.

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

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

General Information

• Status: Published
• Publication Date: 08-Oct-2002
• ICS: 13.120 - Domestic safety
• ICS: 97.040.50 - Small kitchen appliances
• Technical Committee: TC 61 - Safety of household and similar electrical appliances
• Current Stage: DELPUB - Deleted Publication
• Start Date: 03-Sep-2021
• Completion Date: 20-Nov-2020

Relations

• Amended By: IEC 60335-2-74:2002/AMD2:2009 - Amendment 2 - Household and similar electrical appliances - Safety - Part 2-74: Particular requirements for portable immersion heaters
• Effective Date: 05-Sep-2023
• Amended By: IEC 60335-2-74:2002/AMD1:2006 - Amendment 1 - Household and similar electrical appliances - Safety - Part 2-74: Particular requirements for portable immersion heaters
• Effective Date: 05-Sep-2023
• Revised: IEC 60335-2-74:2021 - Household and similar electrical appliances - Safety - Part 2-74: Particular requirements for portable immersion heaters
• Effective Date: 05-Sep-2023

Overview

IEC 60335-2-74:2002 is the International Electrotechnical Commission (IEC) safety standard that sets particular requirements for portable immersion heaters used for household and similar purposes. It applies to appliances with a rated voltage of not more than 250 V and covers units intended for use by laymen in homes, shops, light industry and on farms. This Part 2 standard is to be used together with the general safety requirements in IEC 60335-1.

Key topics and requirements

• Scope and exclusions: Covers portable electric immersion heaters; excludes appliances intended exclusively for industrial use, aquarium heaters (IEC 60335-2-55), fixed immersion heaters (IEC 60335-2-73) and certain heating elements covered by other parts.
• Rated voltage: Appliances with rated voltage up to 250 V.
• Ingress protection: Immersion heaters shall be at least IPX7, addressing water immersion resistance.
• Marking and instructions:
  • Appliances must be marked with maximum and minimum depths of immersion (marking lines are allowed if explained in instructions).
  • Instructions must include suitable vessel details, a clear warning to unplug before removing the heater from liquid, and that the heating element remains hot after unplugging and should not be touched or placed on combustible surfaces.
• Heating tests: Operation for 15 minutes after water temperature reaches 95 °C (or after stabilized temperature/thermal control operation) to verify safe thermal behavior.
• Electrical safety tests: Clauses covering leakage current, electric strength at operating temperature, transient overvoltages, and moisture resistance are applied as per Part 1 with the particular adaptations in this part.
• Abnormal operation and mechanical tests: Specific abnormal operation tests (some limited to frost-prevention trough heaters) and mechanical placement tests (e.g., appliances placed in most unfavourable position) are specified; a 200 K temperature rise allowance is noted during the first minute for some test surfaces.
• General conformity: This Part 2 supplements and modifies IEC 60335-1; where not replaced, Part 1 clauses apply.

Applications - who uses this standard

• Manufacturers and product designers of portable immersion heaters - for design, safety validation and product documentation.
• Test laboratories and certification bodies - to perform required safety and performance tests.
• Regulatory and compliance teams - to demonstrate conformity with international household appliance safety requirements.
• Importers, distributors, and procurement professionals - to verify product compliance and safe use instructions.
• Safety engineers and risk assessors - for hazard analysis and user-instruction content.

Related standards

• IEC 60335-1 (general requirements for household electrical appliances)
• IEC 60335-2-15 (portable liquid heaters - related heating elements)
• IEC 60335-2-55 (aquarium heaters)
• IEC 60335-2-73 (fixed immersion heaters)
• IEC 60364 (wiring rules referenced in the Introduction)

Keywords: IEC 60335-2-74, portable immersion heaters, safety standard, IPX7, immersion heater marking, household appliance safety, leakage current test, heating test.

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
60335-2-74
Second edition
2002-10
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

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
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enables you to search by a variety of criteria including text searches, technical
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INTERNATIONAL IEC
STANDARD
60335-2-74
Second edition
2002-10
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 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: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
L
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 60335-2-74  IEC:2002(E)

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 . 7
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. 8
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. 9
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.11
Bibliography.11

60035-2-74  IEC:2002(E) – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

–––––––––––––
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-74: Particular requirements for portable immersion 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 1994. It constitutes a
technical revision.
The text of this part of IEC 60335 is based on the following documents:
FDIS Report on voting
61/2177/FDIS 61/2258/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 portable electric
immersion heaters.
– 4 – 60335-2-74  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.
– 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).
A bilingual version of this publication may be issued at a later date.

60035-2-74  I
...

IEC 60335-2-74
Edition 2.1 2006-05
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

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by

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IEC 60335-2-74
Edition 2.1 2006-05
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
CD
CODE PRIX
ICS 13.120; 97.040.50 ISBN 2-8318-8662-7

– 2 – 60335-2-74  CEI:2002+A1:2006

SOMMAIRE
AVANT-PROPOS.4

INTRODUCTION.8

1 Domaine d’application.10

2 Références normatives.10

3 Définitions.10

4 Prescriptions générales.12

5 Conditions générales d’essais .12
6 Classification.12
7 Marquage et instructions .12
8 Protection contre l’accès aux parties actives .12
9 Démarrage des appareils à moteur.14
10 Puissance et courant .14
11 Echauffements.14
12 Vacant.14
13 Courant de fuite et rigidité diélectrique à la température de régime .14
14 Surtensions transitoires.14
15 Résistance à l’humidité.14
16 Courant de fuite et rigidité diélectrique .14
17 Protection contre la surcharge des transformateurs et des circuits associés.14
18 Endurance.14
19 Fonctionnement anormal.16
20 Stabilité et dangers mécaniques .16
21 Résistance mécanique.16
22 Construction.16
23 Conducteurs internes .16
24 Composants.16
25 Raccordement au réseau et câbles souples extérieurs .18
26 Bornes pour conducteurs externes .18

27 Dispositions en vue de la mise à la terre .18
28 Vis et connexions.18
29 Distances dans l’air, lignes de fuite et isolation solide .18
30 Résistance à la chaleur et au feu.18
31 Protection contre la rouille.18
32 Rayonnement, toxicité et dangers analogues.18

Annexes .20

Bibliographie.20

60335-2-74  IEC:2002+A1:2006 – 3 –

CONTENTS
FOREWORD.5

INTRODUCTION.9

1 Scope.11

2 Normative references.11

3 Definitions.11

4 General requirement.13

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

27 Provision for earthing .19
28 Screws and connections .19
29 Clearances, creepage distances and solid insulation .19
30 Resistance to heat and fire.19
31 Resistance to rusting.19
32 Radiation, toxicity and similar hazards.19

Annexes .21

Bibliography.21

– 4 – 60335-2-74 © CEI:2002+A1:2006

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE

___________
APPAREILS ÉLECTRODOMESTIQUES ET ANALOGUES –

SÉCURITÉ –
Partie 2-74: Règles particulières pour les thermoplongeurs mobiles

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 0335-2-74 comprend la deuxième édition (2002)
[documents 61/2177/FDIS et 61/2258/RVD] et son amendement 1 (2006) [documents
61/2962/CDV et 61/3028/RVC].
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.

60335-2-74 © IEC:2002+A1:2006 – 5 –

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 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.
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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] and its amendment 1 (2006) [documents
61/2962/CDV and 61/3028/RVC].
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 – 60335-2-74  CEI:2002+A1:2006

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 thermo-
plongeurs mobiles électriques.

Lorsqu'un paragraphe particulier de la Partie 1 n'est pas mentionné dans cette partie 2, ce
paragraphe s'applique pour autant qu'il est 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 compléme
...

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

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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

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CE
CODE PRIX
ICS 13.120; 97.040.50 ISBN 978-2-88910-165-8
– 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.

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.

– 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.

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.
– 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.

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.

– 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.

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.

– 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 eart
...