IEC 60335-2-12:2024

Household and similar electrical appliances - Safety - Part 2-12: Particular requirements for warming plates and similar appliances

IEC 60335-2-12:2024 deals with the safety of electric warming plates, warming trays and similar appliances intended to keep food or vessels warm, for household and similar purposes, their rated voltage being not more than 250 V including direct current (DC) supplied appliances and battery-operated appliances.
Appliances intended for normal household and similar use and that can also be used by laypersons in shops, in light industry and on farms are within the scope of this standard. However, if the appliance is intended to be used professionally to keep vessels warm or to process food for commercial consumption, the appliance is not considered to be for household and similar use only.
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.
Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or in aircraft, additional requirements can 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.
This standard does not apply to
– appliances made of flexible material, such as textile material;
– appliances intended exclusively to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas);
– appliances intended exclusively for commercial catering (IEC 60335 2 49, IEC 60335 2 50);
– appliances intended exclusively industrial purposes;
– warming cabinets.
This sixth edition cancels and replaces the fifth edition published in 2002, Amendment 1:2008 and Amendment 2:2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) alignment with IEC 60335-1:2020;
b) conversion of some notes to normative text (Clause 1, 5.2, 7.12, 15.2, 15.101, 24.1.5);
c) application of test probe 19 (8.1.1, 20.2, B.22.3, B.22.4);
d) clarification of applicability of requirements for remote operation (22.40, 22.49, 22.51).
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its amendments unless that edition precludes it; in that case, the latest edition that does not preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.

Appareils électrodomestiques et analogues - Sécurité - Partie 2-12: Règles particulières pour les chauffe-plats et appareils analogues

L’IEC 60335-2-12:2024 traite de la sécurité des chauffe-plats électriques et appareils analogues destinés à maintenir au chaud des aliments ou des récipients, pour usages domestiques et analogues, dont la tension assignée est inférieure ou égale à 250 V, y compris les appareils alimentés en courant continu et les appareils alimentés par batteries.
Les appareils destinés à un usage domestique et analogue normal et qui peuvent être également utilisés par des usagers non avertis dans des magasins, chez des artisans et dans des fermes sont compris dans le domaine d'application de la présente norme. Toutefois, si l’appareil est destiné à être utilisé professionnellement pour garder des récipients au chaud ou pour préparer des aliments à des fins commerciales, l’appareil n’est pas considéré comme étant seulement à usage domestique et analogue.
Dans la mesure du possible, la présente norme traite des dangers courants que présentent les appareils et auxquels sont exposés tous les individus à l'intérieur et autour de l'habitation.
Cependant, elle ne tient en général pas compte
– 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.
L’attention est attirée sur le fait que
– pour les appareils destinés à être utilisés dans des véhicules ou à bord de navires ou d’aéronefs, des exigences supplémentaires peuvent être nécessaires;
– dans de nombreux pays, des exigences supplémentaires sont spécifiées par les organismes nationaux de la santé publique, par les organismes nationaux responsables de la protection des travailleurs et par des organismes analogues.
La présente norme ne s'applique pas
– aux appareils constitués de matériaux souples tels que le tissu;
– aux appareils destinés à être utilisés exclusivement dans des locaux qui présentent des conditions particulières, telles que la présence d'une atmosphère corrosive ou explosive (poussière, vapeur ou gaz);
– aux appareils prévus exclusivement pour la restauration commerciale (IEC 60335 2 49, IEC 60335 2 50);
– aux appareils prévus exclusivement pour des usages industriels;
– aux meubles de maintien au chaud.
Cette sixième édition annule et remplace la cinquième édition parue en 2002, son Amendement 1:2008 et son Amendement 2:2017. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) texte aligné sur l'IEC 60335-1:2020;
b) transformation de certaines notes en texte normatif (Articles et paragraphes 1, 5.2, 7.12, 15.2, 15.101, 24.1.5);
c) application du calibre d’essai 19 (8.1.1, 20.2, B.22.3, B.22.4);
d) clarification de l'applicabilité des exigences pour la commande à distance (22.40, 22.49, 22.51).
La présente partie 2 doit être utilisée conjointement avec la dernière édition de l'IEC 60335-1 et ses amendements sauf si cette édition l'exclut; dans ce cas, la dernière édition qui n'exclut pas la présente partie 2 est utilisée. Elle a été établie sur la base de la sixième édition (2020) de cette norme.

General Information

• Status: Published
• Publication Date: 22-Aug-2024
• ICS: 13.120 - Domestic safety
• ICS: 97.040.50 - Small kitchen appliances
• Technical Committee: TC 61 - Safety of household and similar electrical appliances
• Drafting Committee: MT 37 - TC 61/MT 37
• Current Stage: PPUB - Publication issued
• Start Date: 20-Sep-2024
• Completion Date: 23-Aug-2024

Relations

• Revises: IEC 60335-2-12:2002 - Household and similar electrical appliances - Safety - Part 2-12: Particular requirements for warming plates and similar appliances
• Effective Date: 05-Sep-2023
• Revises: IEC 60335-2-12:2002/AMD2:2017 - Amendment 2 - Household and similar electrical appliances - Safety - Part 2-12: Particular requirements for warming plates and similar appliances
• Effective Date: 05-Sep-2023
• Revises: IEC 60335-2-12:2002/AMD1:2008 - Amendment 1 - Household and similar electrical appliances - Safety - Part 2-12: Particular requirements for warming plates and similar appliances
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60335-2-12 ®
Edition 6.0 2024-08
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances
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IEC 60335-2-12 ®
Edition 6.0 2024-08
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120, 97.040.50 ISBN 978-2-8322-9611-0
– 2 – IEC 60335-2-12:2024 CMV © IEC 2024
CONTENTS
FOREWORD .4
INTRODUCTION .7
1 Scope .8
2 Normative references .9
3 Terms and definitions .9
4 General requirement .9
5 General conditions for the tests .9
6 Classification .9
7 Marking and instructions . 10
8 Protection against access to live parts . 11
9 Starting of motor-operated appliances . 11
10 Power input and current . 11
11 Heating . 11
12 Void Charging of metal-ion batteries . 13
13 Leakage current and electric strength at operating temperature . 13
14 Transient overvoltages . 13
15 Moisture resistance . 13
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 . 14
21 Mechanical strength . 15
22 Construction . 15
23 Internal wiring . 16
24 Components . 16
25 Supply connection and external flexible cords . 16
26 Terminals for external conductors . 16
27 Provision for earthing . 16
28 Screws and connections . 17
29 Clearances, creepage distances and solid insulation . 17
30 Resistance to heat and fire . 17
31 Resistance to rusting. 17
32 Radiation, toxicity and similar hazards . 17
Annexes . 18
Annex B (normative) Battery-operated appliances, detachable batteries and separable
batteries for battery-operated appliances . 19
Bibliography . 20
List of comments . 21

Figure 101 – Probe for measuring surface temperatures . 17

Table 101 – Maximum temperature rises of external accessible surfaces under normal
operating conditions . 12

– 4 – IEC 60335-2-12:2024 CMV © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
FOREWORD
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This commented version (CMV) of the official standard IEC 60335-2-12:2024 edition 6.0
allows the user to identify the changes made to the previous IEC 60335-2-
12:2002+AMD1:2008+AMD2:2017 CSV edition 5.2. Furthermore, comments from IEC TC
61 experts are provided to explain the reasons of the most relevant changes, or to clarify
any part of the content.
A vertical bar appears in the margin wherever a change has been made. Additions are in
green text, deletions are in strikethrough red text. Experts' comments are identified by a
blue-background number. Mouse over a number to display a pop-up note with the
comment.
This publication contains the CMV and the official standard. The full list of comments is
available at the end of the CMV.

IEC 60335-2-12 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This sixth edition cancels and replaces the fifth edition published in 2002, Amendment 1:2008
and Amendment 2:2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with IEC 60335-1:2020;
b) conversion of some notes to normative text (Clause 1, 5.2, 7.12, 15.2, 15.101, 24.1.5);
c) application of test probe 19 (8.1.1, 20.2, B.22.3, B.22.4);
d) clarification of applicability of requirements for remote operation (22.40, 22.49, 22.51).
The text of this International Standard is based on the following documents:
Draft Report on voting
61/7265/FDIS 61/7283/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on t
...

IEC 60335-2-12 ®
Edition 6.0 2024-08
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This full version of IEC 60335-2-12:2024 includes the content of the references made to
IEC 60335-1:2020
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances
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
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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.

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IEC 60335-2-12 ®
Edition 6.0 2024-08
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This full version of IEC 60335-2-12:2024 includes the content of the references made to
IEC 60335-1:2020
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120; 97.040.50 ISBN 978-2-8322-9614-1

IEC 60335-1:2020/ISH1:2021 – 1 –
© IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC 60335-1
Edition 6.0  2020-09
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –

Part 1: General requirements
INTERPRETATION SHEET 1
This interpretation sheet has been prepared by IEC technical committee 61: Safety of
household and similar electrical appliances.
The text of this Interpretation Sheet is based on the following documents:
Draft Report on voting
61/5999/DISH 61/6009/RVDISH
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
___________
INTRODUCTION
Edition 6 of IEC 60335-1:2020 defines and introduces requirements for a detachable
power supply part of an appliance. In the document, 24.2 prohibits the use of a power
supply in a flexible cord.
QUESTION:
Does Subclause 24.2 prohibit the use of a detachable power supply part?
ANSWER
No, a "detachable power supply part" is a defined term and is not captured by the term
"power supply" as used in Subclause 24.2.
NOTE A detachable power supply part is captured by the defined term when the output of the power supply
part is detachable from the class III construction part of the appliance at:
– the power supply part, or
– the class III construction part of the appliance.
However, the supply cord (if any) does not have to be detachable from the detachable power supply part.
ICS 13.120; 97.030
IEC 60335-1:2020-09/ISH1:2021-11(en)

– 2 – IEC 60335-2-12:2024 EXV © IEC 2024
CONTENTS
FOREWORD . 6
INTRODUCTION to IEC 60335-1:2020 . 9
INTRODUCTION to IEC 60335-2-12:2024 . 11
1 Scope . 12
2 Normative references . 12
3 Terms and definitions . 17
4 General requirement . 29
5 General conditions for the tests . 29
6 Classification . 33
7 Marking and instructions . 33
8 Protection against access to live parts . 43
9 Starting of motor-operated appliances . 45
10 Power input and current . 45
11 Heating . 47
12 Charging of metal-ion batteries . 53
13 Leakage current and electric strength at operating temperature . 55
14 Transient overvoltages . 58
15 Moisture resistance . 58
16 Leakage current and electric strength . 62
17 Overload protection of transformers and associated circuits . 64
18 Endurance . 64
19 Abnormal operation . 64
20 Stability and mechanical hazards . 74
21 Mechanical strength . 76
22 Construction . 78
23 Internal wiring . 90
24 Components . 92
25 Supply connection and external flexible cords . 97
26 Terminals for external conductors . 105
27 Provision for earthing . 108
28 Screws and connections . 109
29 Clearances, creepage distances and solid insulation . 112
30 Resistance to heat and fire . 120
31 Resistance to rusting . 124
32 Radiation, toxicity and similar hazards . 124
Annex A (informative) Routine tests . 139
Annex B (normative) Battery-operated appliances, separable batteries and detachable
batteries for battery-operated appliances . 141
Annex C (normative) Ageing test on motors . 162
Annex D (normative) Thermal motor protectors . 163
Annex E (normative) Needle-flame test . 164
Annex F (normative) Capacitors . 165

Annex G (normative) Safety isolating transformers . 167
Annex H (normative) Switches . 168
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 170
Annex J (normative) Coated printed circuit boards . 172
Annex K (informative) Overvoltage categories . 173
Annex L (informative) Guidance for the measurement of clearances and creepage

distances . 174
Annex M (informative) Pollution degree . 177
Annex N (normative) Proof tracking test . 178
Annex O (informative) Selection and sequence of the tests of Clause 30 . 179
Annex P (informative) Guidance for the application of this standard to appliances
used in tropical climates . 184
Annex Q (informative) Sequence of tests for the evaluation of electronic circuits . 186
Annex R (normative) Software evaluation . 189
Annex S (informative) Guidance for the application of this standard on measurement
of power input and current based on the requirements of 10.1 and 10.2 concerning the

representative period . 203
Annex T (normative) UV-C radiation effect on non-metallic materials . 204
Annex U (normative) Appliances intended for remote communication through public
networks . 207
Bibliography . 211
Index of defined terms . 214

Figure 1 – Circuit diagram for leakage current measurement at operating temperature
for single-phase connection of class II appliances and for parts of class ll construction . 125
Figure 2 – Circuit diagram for leakage current measurement at operating temperature
for single-phase connection of other than class II appliances or parts of class ll
construction . 126
Figure 3 – Circuit diagram for leakage current measurement at operating temperature
for three-phase with neutral class II appliances and for parts of class ll construction . 127
Figure 4 – Circuit diagram for leakage current measurement at operating temperature
for three-phase with neutral appliances other than those of class II or parts of class ll
construction . 128
Figure 5 – Small part . 129
Figure 6 – Example of an electronic circuit with low-power points . 129
Figure 7 – Test finger nail . 130
Figure 8 – Flexing test apparatus . 131
Figure 9 – Constructions of cord anchorages . 132
Figure 10 – An example of parts of an earthing terminal . 133
Figure 11 – Examples of clearances .
...

IEC 60335-2-12 ®
Edition 6.0 2024-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-12: Règles particulières pour les chauffe-plats et appareils analogues
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International Standards for all electrical, electronic and related technologies.

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IEC 60335-2-12 ®
Edition 6.0 2024-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –

Part 2-12: Particular requirements for warming plates and similar appliances

Appareils électrodomestiques et analogues – Sécurité –

Partie 2-12: Règles particulières pour les chauffe-plats et appareils analogues

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120, 97.040.50 ISBN 978-2-8322-9559-5

– 2 – IEC 60335-2-12:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 9
4 General requirement . 9
5 General conditions for the tests . 9
6 Classification . 9
7 Marking and instructions . 10
8 Protection against access to live parts . 11
9 Starting of motor-operated appliances . 11
10 Power input and current . 11
11 Heating . 11
12 Charging of metal-ion batteries . 13
13 Leakage current and electric strength at operating temperature . 13
14 Transient overvoltages . 13
15 Moisture resistance . 13
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 . 14
21 Mechanical strength . 15
22 Construction . 15
23 Internal wiring . 16
24 Components . 16
25 Supply connection and external flexible cords . 16
26 Terminals for external conductors . 16
27 Provision for earthing . 16
28 Screws and connections . 16
29 Clearances, creepage distances and solid insulation . 16
30 Resistance to heat and fire . 16
31 Resistance to rusting . 17
32 Radiation, toxicity and similar hazards . 17
Annexes . 18
Annex B (normative) Battery-operated appliances, detachable batteries and separable
batteries for battery-operated appliances . 19
Bibliography . 20

Figure 101 – Probe for measuring surface temperatures . 17

Table 101 – Maximum temperature rises of external accessible surfaces under normal
operating conditions . 12

– 4 – IEC 60335-2-12:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
FOREWORD
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