IEC 60335-2-35:2012

Household and similar electrical appliances - Safety - Part 2-35: Particular requirements for instantaneous water heaters

IEC 60335-2-35:2012 deals with the safety of electric instantaneous water heaters for household and similar purposes and intended for heating water below boiling temperature, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances. Instantaneous water heaters incorporating bare heating elements are within the scope of this standard. Appliances not intended for normal household use but that 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 or children playing with the appliance. This fifth edition cancels and replaces the fourth edition published in 2002, including its Amendment 1 (2006) and its Amendment 2 (2009). The principal changes in this edition as compared with the fourth edition of IEC 60335-2-31 are as follows:
- converted notes to normative text (7.12, 7.102, 8.1.5, 22.104, and 22.109.3);
- deleted notes in 19.13, 22.109, and A.101;
- added Annex R and 22.108 for appliances with programmable electronic circuits and added requirements for water heaters (22.50, 22.51). 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 this publication be adopted for implementation nationally not earlier than 12 months or later than 36 months from the date of publication. Keywords: Water heater, Instantaneous, open-outlet, bare-element.
This publication is to be read in conjunction with IEC 60335-1:2010.

Appareils électrodomestiques et analogues - Sécurité - Partie 2-35: Exigences particulières pour les chauffe-eau instantanés

La CEI 60335-2-35:2012 traite de la sécurité des chauffe-eau électriques instantanés pour usages domestiques et analogues, destinés à chauffer l'eau au-dessous de la température d'ébullition, et dont la tension assignée n'est pas supérieure à 250 V pour les appareils monophasés et à 480 V pour les autres appareils. Les chauffe-eau instantanés comportant des éléments chauffants nus sont compris dans le domaine d'application de la présente norme. 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 dans les magasins, chez les artisans et dans les 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 qui sont encourus par tous les individus à l'intérieur et autour de l'habitation. Cependant, cette norme ne tient pas compte en général des personnes (y compris des enfants) dont les capacités physiques, sensorielles ou mentales; ou le manque d'expérience et de connaissance les empêchent d'utiliser l'appareil en toute sécurité sans surveillance ou instruction; de l'utilisation de l'appareil comme jouet par des enfants. Cette cinquième édition annule et remplace la quatrième édition publiée en 2002, son Amendement 1 (2006) et son Amendement 2 (2009). Par rapport à la quatrième édition de la CEI 60335-2-35, les principales modifications indiquées ci-après ont été apportées dans la présente édition (les modifications mineures ne sont pas mentionnées):
- transposition de certaines notes en texte normatif (7.12, 7.102, 8.1.5, 22.104 et 22.109.3);
- suppression de certaines notes en 19.13, 22.109 et en A.101;
- ajout de l'Annexe R et de 22.108 pour les appareils équipés de circuits électroniques programmables;
- ajout d'exigences pour les chauffe-eau (22.50, 22.51). L'attention des Comités Nationaux est attirée sur le fait que les fabricants d'appareils et les organismes d'essai peuvent avoir besoin d'une période transitoire après la publication d'une nouvelle publication CEI, ou d'une publication amendée ou révisée, pour fabriquer des produits conformes aux nouvelles exigences et pour adapter leurs équipements aux nouveaux essais ou aux essais révisés. Le comité recommande que le contenu de cette publication soit entériné au niveau national au plus tôt 12 mois et au plus tard 36 mois après la date de publication. Mots-clés: chauffe-eau, instantané, écoulement libre, éléments nus
Cette publication doit être lue conjointement avec la CEI 60335-1:2010.

General Information

• Status: Published
• Publication Date: 06-Nov-2012
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• 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: PPUB - Publication issued
• Start Date: 15-Dec-2012
• Completion Date: 07-Nov-2012

Relations

• Amended By: IEC 60335-2-35:2012/AMD2:2020 - Amendment 2 - Household and similar electrical appliances - Safety - Part 2-35: Particular requirements for instantaneous water heaters
• Effective Date: 05-Sep-2023
• Amended By: IEC 60335-2-35:2012/AMD1:2016 - Amendment 1 - Household and similar electrical appliances - Safety - Part 2-35: Particular requirements for instantaneous water heaters
• Effective Date: 05-Sep-2023
• Revises: IEC 60335-2-35:2002/AMD2:2009 - Amendment 2 - Household and similar electrical appliances - Safety - Part 2-35: Particular requirements for instantaneous water heaters
• Effective Date: 05-Sep-2023
• Revises: IEC 60335-2-35:2002/AMD1:2006 - Amendment 1 - Household and similar electrical appliances - Safety - Part 2-35: Particular requirements for instantaneous water heaters
• Effective Date: 05-Sep-2023
• Revises: IEC 60335-2-35:2002 - Household and similar electrical appliances - Safety - Part 2-35: Particular requirements for instantaneous water heaters
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60335-2-35 ®
Edition 5.0 2012-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-35: Particular requirements for instantaneous water heaters

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-35: Exigences particulières pour les chauffe-eau instantanés

All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
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IEC 60335-2-35 ®
Edition 5.0 2012-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –

Part 2-35: Particular requirements for instantaneous water heaters

Appareils électrodomestiques et analogues – Sécurité –

Partie 2-35: Exigences particulières pour les chauffe-eau instantanés

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 13.120; 97.040.50 ISBN 978-2-83220-455-9

– 2 – 60335-2-35 © IEC:2012
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 General requirement . 9
5 General conditions for the tests . 9
6 Classification . 10
7 Marking and instructions . 10
8 Protection against access to live parts . 11
9 Starting of motor-operated appliances . 12
10 Power input and current. 12
11 Heating. 12
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 . 13
17 Overload protection of transformers and associated circuits . 13
18 Endurance . 13
19 Abnormal operation . 13
20 Stability and mechanical hazards. 14
21 Mechanical strength . 14
22 Construction . 14
23 Internal wiring . 18
24 Components . 18
25 Supply connection and external flexible cords . 19
26 Terminals for external conductors . 19
27 Provision for earthing . 19
28 Screws and connections . 20
29 Clearances, creepage distances and solid insulation . 20
30 Resistance to heat and fire . 20
31 Resistance to rusting . 20
32 Radiation, toxicity and similar hazards . 20
Annexes . 23
Annex A (informative) Routine tests . 23
Annex R (normative) Software evaluation . 24
Bibliography . 25

Figure 101 – Diagram for the leakage current measurement for single-phase bare-
element water heaters . 21

60335-2-35 © IEC:2012 – 3 –
Figure 102 – Diagram for the leakage current measurement for three-phase bare-
element water heaters . 21
Figure 103 – Diagram for the leakage current measurement for single-phase bare-
element water heaters supplied by a supply cord fitted with a plug. 22

– 4 – 60335-2-35 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-35: Particular requirements for instantaneous water 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
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
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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
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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This part of International Standard IEC 6033
...

IEC 60335-2-35 ®
Edition 5.2 2020-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-35: Particular requirements for instantaneous water heaters
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-35: Exigences particulières pour les chauffe-eau instantanés
All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
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et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
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les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
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CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
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and withdrawn publications. Also known as the International Electrotechnical Vocabulary
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Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
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[e-mail].
IEC 60335-2-35 ®
Edition 5.2 2020-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-35: Particular requirements for instantaneous water heaters
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-35: Exigences particulières pour les chauffe-eau instantanés
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120; 97.040.50 ISBN 978-2-8322-8457-5

colour
inside
IEC 60335-2-35 ®
Edition 5.2 2020-06
REDLINE VERSION
VERSION REDLINE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-35: Particular requirements for instantaneous water heaters
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-35: Exigences particulières pour les chauffe-eau instantanés
– 2 – IEC 60335-2-35:2012+AMD1:2016
+AMD2:2020 CSV © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 General requirement . 9
5 General conditions for the tests . 9
6 Classification . 10
7 Marking and instructions . 10
8 Protection against access to live parts . 12
9 Starting of motor-operated appliances . 12
10 Power input and current. 12
11 Heating. 12
12 Void . 13
13 Leakage current and electric strength at operating temperature . 13
14 Transient overvoltages . 14
15 Moisture resistance . 14
16 Leakage current and electric strength . 14
17 Overload protection of transformers and associated circuits . 14
18 Endurance . 14
19 Abnormal operation . 14
20 Stability and mechanical hazards. 15
21 Mechanical strength . 15
22 Construction . 15
23 Internal wiring . 19
24 Components . 19
25 Supply connection and external flexible cords . 21
26 Terminals for external conductors . 21
27 Provision for earthing . 21
28 Screws and connections . 21
29 Clearances, creepage distances and solid insulation . 21
30 Resistance to heat and fire . 21
31 Resistance to rusting . 22
32 Radiation, toxicity and similar hazards . 22
Annexes . 24
Annex A (informative) Routine tests . 24
Annex R (normative) Software evaluation . 25
Bibliography . 26
Figure 101 – Diagram for the leakage current measurement for single-phase bare-
element water heaters . 22

+AMD2:2020 CSV © IEC 2020
Figure 102 – Diagram for the leakage current measurement for three-phase bare-
element water heaters . 23
Figure 103 – Diagram for the leakage current measurement for single-phase bare-

element water heaters supplied by a supply cord fitted with a plug. 23
Figure 104 – Probe for measuring surface temperatures . 24

Table 101 – Maximum temperature rises for specified external accessible surfaces
under normal operating conditions . 13

– 4 – IEC 60335-2-35:2012+AMD1:2016
+AMD2:2020 CSV © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-35: Particular requirements for instantaneous water 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
bet
...

IEC 60335-2-35 ®
Edition 5.1 2016-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-35: Particular requirements for instantaneous water heaters

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-35: Exigences particulières pour les chauffe-eau instantanés

All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
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iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
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and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
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Centre: [e-mail].
A propos de l'IEC
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Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

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IEC 60335-2-35 ®
Edition 5.1 2016-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –

Part 2-35: Particular requirements for instantaneous water heaters

Appareils électrodomestiques et analogues – Sécurité –

Partie 2-35: Exigences particulières pour les chauffe-eau instantanés

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120, 97.040.50 ISBN 978-2-8322-3752-6

IEC 60335-2-35 ®
Edition 5.1 2016-11
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-35: Particular requirements for instantaneous water heaters

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-35: Exigences particulières pour les chauffe-eau instantanés

– 2 – IEC 60335-2-35:2012+AMD1:2016 CSV
© IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 General requirement . 9
5 General conditions for the tests . 9
6 Classification . 10
7 Marking and instructions . 10
8 Protection against access to live parts . 12
9 Starting of motor-operated appliances . 12
10 Power input and current. 12
11 Heating. 12
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. 14
21 Mechanical strength . 14
22 Construction . 14
23 Internal wiring . 19
24 Components . 19
25 Supply connection and external flexible cords . 20
26 Terminals for external conductors . 20
27 Provision for earthing . 20
28 Screws and connections . 20
29 Clearances, creepage distances and solid insulation . 20
30 Resistance to heat and fire . 20
31 Resistance to rusting . 21
32 Radiation, toxicity and similar hazards . 21
Annexes . 23
Annex A (informative) Routine tests . 23
Annex R (normative) Software evaluation . 24
Bibliography . 25

Figure 101 – Diagram for the leakage current measurement for single-phase bare-
element water heaters . 21

© IEC 2016
Figure 102 – Diagram for the leakage current measurement for three-phase bare-
element water heaters . 22
Figure 103 – Diagram for the leakage current measurement for single-phase bare-
element water heaters supplied by a supply cord fitted with a plug. 22

– 4 – IEC 60335-2-35:2012+AMD1:2016 CSV
© IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-35: Particular requirements for instantaneous water 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,
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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 respo
...