IEC 60335-2-12:2024
(Main)Household and similar electrical appliances - Safety - Part 2-12: Particular requirements for warming plates and similar appliances
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.
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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
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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
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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
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the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
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 the IEC website.
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.
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: Particular requirements for warming plates and similar
appliances.
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 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.
– 6 – IEC 60335-2-12:2024 CMV © IEC 2024
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 document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations can 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.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.
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.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
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 can 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 Horizontal publications, basic safety publications and group safety
publications 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 1
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.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters. 2
– 8 – IEC 60335-2-12:2024 CMV © IEC 2024
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 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. 3
Appliances intended for normal household and similar use and that may can also be used by
laymen 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. 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 in aircraft, additional
requirements may 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.
NOTE 102 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 or industrial purposes
(IEC 60335-2-49, IEC 60335-2-50);
– appliances intended exclusively industrial purposes;
– warming cabinets.
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60320-1:2021, Appliance couplers for household and similar purposes – Part 1: General
requirements
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.9 Replacement Modification:
normal operation
Replace the first paragraph with the following:
operation of the appliance under the following conditions:
The appliance is operated with a shallow pan, 150 mm in diameter and filled with water to a
height of at least 25 mm, placed on the heated surface. If vessels are supplied with the
appliance, or specified in the instructions, these are used instead.
The appliance is operated without a pan if this condition is more unfavourable.
3.6 Definitions relating to parts of appliances
3.6.101
hot functional surface
surface that is intentionally heated by an internal heat source and that has to be hot to carry
out the intended function of the appliance
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.
5.2 Addition:
NOTE 101 If the test of 15.101 has to be carried out, three additional samples are required.
6 Classification
This clause of Part 1 is applicable.
– 10 – IEC 60335-2-12:2024 CMV © IEC 2024
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances intended to be partially immersed in water for cleaning shall be marked with the
maximum level of immersion and with the substance of the following:
Do not immerse beyond this level.
When the provisions of footnote b to Table 101 apply, the appliance shall be marked with:
– the substance of "CAUTION: Hot surface", or
– symbol IEC 60417-5041 (2002-10).
7.6 Addition:
[symbol IEC 60417-5041 (2002-10)] caution, hot surface
7.12 Addition:
The instructions shall include the substance of the following:
This appliance is intended to be used in household and similar applications such as:
– staff kitchen areas in shops, offices and other working environments;
– farm houses;
– by clients in hotels, motels and other residential type environments;
– bed and breakfast type environments.
NOTE 101 If the manufacturer wants to limit the use of the appliance to less than the above,
this has to shall be clearly stated in the instructions.
The instructions for appliances incorporating an appliance inlet and intended to be partially or
completely immersed in water for cleaning, shall state that the connector must be removed
before the appliance is cleaned and that the appliance inlet must be dried before the appliance
is used again.
The instructions for appliances intended to be used with a connector incorporating a thermostat
shall state that only the appropriate connector must be used.
The instructions for appliances having surfaces of glass-ceramic or similar material that forms
part of the enclosure of live parts shall include the substance of the following:
WARNING: Do not use the appliance if the surface is cracked.
The instructions for appliances that have to be used with particular vessels that are not supplied
shall specify the vessels to be used.
If symbol IEC 60417-5041 (2002-10) is marked on appliances, its meaning shall be explained
and the location of areas where the limits are exceeded shall be stated or shown by a drawing.
7.14 Addition:
The height of the triangle in symbol IEC 60417-5041 (2002-10) shall be at least 10 mm.
Compliance is checked by measurement.
7.15 Addition:
The marking specified for hot surfaces shall be clearly visible when the appliance is operated
as in normal use, including when actuating any switch, adjusting any control or opening a lid or
door. It shall not be placed on a hot functional surface or on surfaces that are exempted from
the limits of Table 101.
8 Protection against access to live parts
This clause of Part 1 is applicable except as follows.
8.1.1 Addition:
For parts of appliances situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18. 4
8.1.3 Addition:
Test probe 19 is not applied.
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.
11.2 Modification Addition:
Portable appliances are placed away from the walls of the test corner.
11.3 Addition:
Where the external accessible surfaces are suitably flat and access permits, then the test
probe of Figure 101 is used to measure the temperature rises of external accessible surfaces
specified in Table 101. The probe is applied with a force of 4 N ± 1 N to the surface in such a
way that the best possible contact between the probe and the surface is ensured. The
measurement is performed after a contact period of 30 s.
The probe may be held in place using a laboratory stand clamp or similar device. Any measuring
instrument giving the same results as the probe may be used.
– 12 – IEC 60335-2-12:2024 CMV © IEC 2024
11.7 Replacement Modification:
Replace the first paragraph with the following:
Appliances are operated until steady conditions are established.
11.8 Addition Modification:
Replace the first paragraph with the following:
During the test, the temperature rises are monitored continuously and shall not exceed the
values shown in Table 3 and Table 101.
Addition:
When an appliance connector incorporates a thermostat, the temperature rise limit for the pins
of the inlet does not apply.
Table 101 – Maximum temperature rises of external accessible surfaces
under normal operating conditions
a
Temperature rise of external accessible surfaces
K
Surface
Appliances and parts situated Appliances and parts situated
not more than 850 mm above more than 850 mm above the
b
the floor after installation b
floor after installation
Bare metal 38 42
c
42 49
Coated metal
Glass and ceramic 51 56
d e
58 62
Plastic and plastic coating > 0,4 mm ,
NOTE The temperature rise limits of handles, knobs, grips, keyboards, keypads and similar parts are specified
in Table 3. 5
a
The following surfaces or elements shall not be taken into consideration:
– hot functional surfaces;
– handles or control knobs including keypads, keyboards and the like: part of the equipment that a user
needs to touch to operate or adjust the equipment. The equipment has to be installed according to the
manufacturer’s instructions;
– surfaces within 5 mm of touch controls regardless of their shape;
– surfaces within 25 mm of the outline of the hot functional surfaces;
– underside surfaces that are not accessible to a 75 mm diameter probe having a hemispherical end;
– lids and covers.
b
When the required values are not met, the maximum temperature rise shall not be higher than two times the
values indicated.
c
Metal is considered coated when a coating having a minimum thickness of 90 µm made of enamel, powder or
non-substantially plastic coating is used.
d
The temperature rise limit of plastic also applies for plastic material having a metal finish of thickness less
than 0,1 mm.
e
When the thickness of the plastic coating does not exceed 0,4 mm, the temperature rise limits of the coated
metal or of glass and ceramic material apply.
12 Void Charging of metal-ion batteries
This clause of Part 1 is applicable. 6
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.2 Modification Addition:
For appliances that are intended to be used with particular metallic vessels, the vessels are
placed on the heated surface and connected to accessible metal parts. The metal foil is not
in contact with the heated surface.
For other appliances, vessels are not placed on the heated surface, the metal foil being in
contact with accessible surfaces of insulating material.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.2 Addition:
Appliances without containers, other than appliances intended to be used for warming crockery
only, are tested with 0,01 l of saline the spillage solution for each 100 cm of the heated surface.
The solution is poured steadily over the surface over a period of 1 min.
NOTE 101 Appliances that can only be used for warming crockery are not subjected to this test.
15.101 Appliances intended to be partially or completely immersed in water for cleaning shall
have adequate protection against the effects of immersion.
Compliance is checked by the following tests, which are carried out on three additional
appliances.
The appliances are operated under normal operation at 1,15 times rated power input, until
the thermostat operates for the first time. Appliances without a thermostat are operated until
steady conditions are established. The appliances are disconnected from the supply, any
appliance connector being withdrawn. They are then completely immersed in water containing
approximately 1 % NaCl and having a temperature between 10 °C and 25 °C, unless they are
marked with the maximum level of immersion, in which case they are immersed 50 mm deeper
than this level.
After 1 h, the appliances are removed from the saline solution, dried and subjected to the
leakage current test of 16.2. They are then dried, taking care that all moisture is removed from
the insulation around the pins of the appliance inlets, and are then subjected to the leakage
current test of 16.2.
NOTE Care is to be taken to ensure that all moisture is removed from the insulation around the pins of appliance
inlets.
– 14 – IEC 60335-2-12:2024 CMV © IEC 2024
This test is carried out four more times, after which the appliances shall withstand the electric
strength test of 16.3, the voltage being as specified in Table 4.
The appliance having the highest leakage current after the fifth immersion is dismantled and
inspection shall show that there is no trace of liquid on insulation that could result in a reduction
of clearances and creepage distances below the values specified in Clause 29.
The remaining two appliances are operated under normal operation at 1,15 times rated power
input for 240 h. After this period, the appliances are disconnected from the supply and
immersed again for 1 h. They are then dried and subjected to the electric strength test of 16.3,
the voltage being as specified in Table 4.
Inspection shall show that there is no trace of liquid on insulation that could result in a reduction
of clearances and creepage distances below the values specified in Clause 29.
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Modification:
Instead of being subjected to the tests of 19.2 and 19.3, appliances are subjected to the test of
19.101.
19.101 The appliance is operated at rated power input with the heated surface completely
covered with felt strips for 7 h.
The felt strips have a width of 100 mm and are lined with a single layer of textile material. The
2 2
felt has a specific mass of 4 kg/m ± 0,4 kg/m and a thickness of approximately 25 mm. The
textile material consists of pre-washed double-hemmed cotton sheet having a mass between
2 2
and 175 g/m in the dry condition.
140 g/m
If a thermostat operates, the test is repeated with the one-third of the heated surface furthest
from the temperature-sensing element covered.
20 Stability and mechanical hazards
This clause of Part 1 is applicable except as follows.
20.2 Addition:
e the floor after installation or in
For parts of appliances situated not more than 850 mm abov
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18. 7
21 Mechanical strength
This clause of Part 1 is applicable except as follows.
21.1 Addition:
For appliances having surfaces of glass-ceramic or similar material that forms part of the
enclosure of live parts, three blows having an impact energy of 0,70 J are also applied to parts
of such surfaces that are not exposed to impacts during the test of 21.101.
21.101 Appliances having surfaces of glass-ceramic or similar material that forms part of the
enclosure of live parts, shall withstand the stresses liable to occur in normal use.
Compliance is checked by the following test.
A vessel with its base horizontal is dropped from a height of 150 mm onto the surface. The
vessel has a copper or aluminium base that is flat over a diameter of 120 mm ± 10 mm, its
edges being rounded with a radius of at least 10 mm. It is uniformly filled with at least 1,3 kg of
sand or shot so that the total mass is 1,80 kg ± 0,01 kg. The vessel is dropped 10 times.
The appliance is then supplied at rated voltage and operated until steady conditions are
established. A wet pad having dimensions approximately 100 mm × 100 mm is then applied to
the most unfavourable part of the surface. The pad is formed from a cotton sheet of
2 2
400 mm × 400 mm having a mass between 140 g/m and 175 g/m in the dry condition. The
sheet is folded four times to form the pad, which is then soaked with water containing
approximately 1 % NaCl.
The surface shall not be broken and the appliance shall withstand the leakage current test of
16.2.
22 Construction
This clause of Part 1 is applicable except as follows.
22.40 Addition:
Warming plates and similar appliances are not considered to be appliances that could give rise
to a hazard when operated continuously, automatically, or remotely.
22.49 Not applicable.
22.51 Not applicable. 8
22.101 Portable appliances shall not have openings on the underside that would allow small
items to penetrate and touch live parts.
– 16 – IEC 60335-2-12:2024 CMV © IEC 2024
Compliance is checked by inspection and by measuring the distance between the supporting
surface and live parts through openings. This distance shall be at least 6 mm. However, if the
appliance is fitted with legs, this distance is increased to 10 mm if the appliance is intended to
stand on the table and to 20 mm if it is intended to stand on the floor.
22.102 Thermal controls shall not be incorporated in connectors complying with the standard
sheets of IEC 60320-3.
Compliance is checked by inspection. 9
23 Internal wiring
This clause of Part 1 is applicable.
24 Components
This clause of Part 1 is applicable except as follows.
24.1.5 Addition:
For appliance couplers incorporating thermostats, thermal cut-outs or fuses in the connector,
IEC 60320-1:2021 is applicable except that
– the earthing contact of the connector is allowed to be accessible, provided that this contact
is not likely to be gripped during insertion or withdrawal of the connector;
– the temperature required for the test of Clause 18 is that measured on the pins of the
appliance inlet during the heating test of Clause 11 of this standard;
– the breaking-capacity test of Clause 19 is carried out using the inlet of the appliance;
– the temperature rise of current-carrying parts specified in Clause 21 is not determined.
NOTE 101 Thermal controls are not allowed in connectors complying with the standard sheets of IEC 60320-1.
25 Supply connection and external flexible cords
This clause of Part 1 is applicable except as follows.
25.1 Addition:
Appliances incorporating an appliance inlet that does not comply with the standard sheets of
IEC 60320-1 shall be supplied with a cord set. 10
25.7 Addition:
Light polyvinyl chloride sheathed cord (code designation 60227 IEC 52) is allowed, irrespective
of the mass of the appliance.
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.
30.2.2 Not 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.
Key
A adhesive
ameter according to IEC 60584-1 Type K (chrome alumel)
B thermocouple wires 0,3 mm di
C handle arrangement permitting a contact force of 4 N ± 1 N
D polycarbonate tube: inside diameter 3 mm, outside diameter 5 mm
E tinned copper disc: 5 mm diameter, 0,5 mm thick with flat contact face
Figure 101 – Probe for measuring surface temperatures
– 18 – IEC 60335-2-12:2024 CMV © IEC 2024
Annexes
The annexes of Part 1 are applicable except as follows.
Annex B
(normative)
Battery-operated appliances, detachable batteries
and separable batteries for battery-operated appliances
This annex of Part 1 is applicable except as follows:
B.22.3 For parts of appliances situated not more than 850 mm above the floor after installation
or in normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also
applied wherever test probe 18 is used and with the same test conditions used for test probe
18.
B.22.4 For parts of batteries situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18. 11
– 20 – IEC 60335-2-12:2024 CMV © IEC 2024
Bibliography
The Bibliography of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-49, Household and similar electrical appliances – Safety – Part 2-49: Particular
requirements for commercial electric appliances for keeping food and crockery warm
IEC 60335-2-50, Household and similar electrical appliances – Safety – Part 2-50: Particular
requirements for commercial electric bains-marie
List of comments
1 This revision is for alignment with IEC 60335-1:2020.
2 This revision is for alignment with IEC 60335-1:2020.
3 This revision is for alignment with IEC 60335-1:2020.
4 Appliance can be located on the floor where they would be accessible to children up to 3
years in age, so test probe 19 is applicable. However, appliances and parts of appliances
located above 850 mm from the floor are not considered to be within reach of these
children, so test probe 19 is not applied.
5 This Note is added to align with other 60335 Part 2 standards and to clarify that surface
temperatures on these parts in Table 3 are still applicable.
6 This revision is for alignment with IEC 60335-1:2020.
7 Appliance can be located on the floor where they would be accessible to children up to 3
years in age, so test probe 19 is applicable. However, appliances and parts of appliances
located above 850 mm from the floor are not considered to be within reach of these
children, so test probe 19 is not applied.
8 Additional requirements for remote operation were added to IEC 60335-1:2020. However,
the remote operation requirements in Subclauses 22.40, 22.49 and 22.51 are not applicable
for appliances covered by this Part 2 standard because they are not considered to give rise
to a hazard when operated continuously, automatically or remotely.
9 This requirement is relocated from NOTE 101 of Subclause 24.1.5 for alignment with other
60335 Part 2 standards.
10 This revision is for alignment with IEC 60335‑1:2020 because this is now covered by
Subclause 22.58.
11 Battery-operated appliance can be loca
...
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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
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 . 134
Figure 12 – Example of the placement of the cylinder . 135
Figure 13 – Small parts cylinder . 136
Figure 14 – Example of a specified operating region of a lithium-ion cell during
charging . 137
Figure 101 – Probe for measuring surface temperatures . 138
– 4 – IEC 60335-2-12:2024 EXV © IEC 2024
Figure B.1 – Examples of battery-operated appliance constructions and application of
normative Annex B (1 of 2) . 160
Figure B.2 – Examples of correct polarity connection marking representing three
batteries . 161
Figure I.1 – Simulation of faults . 171
Figure L.1 – Sequence for the determination of clearances . 174
Figure L.2 – Sequence for the determination of creepage distances . 175
Figure L.3 – Measurement of clearances . 176
Figure O.1 – Tests for resistance to heat . 179
Figure O.2 – Selection and sequence of tests for resistance to fire in hand-held
appliances . 180
Figure O.3 – Selection and sequence of tests for resistance to fire in attended
appliances . 180
Figure O.4 – Selection and sequence of tests for resistance to fire in unattended
appliances . 181
Figure O.5 – Some applications of the term "within a distance of 3 mm" . 183
Figure Q.1 – Flowchart outlining the sequence of tests for the evaluation of electronic
circuits (1 of 2) . 187
Figure S.1 – Flowchart giving guidance on measurement of power input and current
concerning the representative period . 203
Table 1 – Power input deviation . 45
Table 2 – Current deviation . 46
Table 3 – Maximum normal temperature rises . 50
Table 101 – Maximum temperature rises of external accessible surfaces under normal
operating conditions. 53
Table 4 – Voltage for electric strength test . 57
Table 5 – Characteristics of high-voltage sources . 57
Table 6 – Impulse test voltage . 58
Table 7 – Test voltages. 63
Table 8 – Maximum winding temperature . 67
Table 9 – Maximum abnormal temperature rise . 72
Table 10 – Dimensions of cables and conduits . 98
Table 11 – Minimum cross-sectional area of conductors . 100
Table 12 – Pull force and torque . 102
Table 13 – Nominal cross-sectional area of conductors . 107
Table 14 – Torque for testing screws and nuts . 111
Table 15 – Rated impulse voltage . 113
Table 16 – Minimum clearances . 113
Table 17 – Minimum creepage distances for basic insulation . 117
Table 18 – Minimum creepage distances for functional insulation . 118
Table 19 – Minimum thickness for accessible parts of reinforced insulation consisting
of a single layer . 120
Table A.1 – Test voltages . 140
Table B.1 – Artificial source characteristics . 143
Table B.2 – Total area of openings for metal-ion cells . 151
Table B.3 – Volume of air injected at 2 070 kPa . 151
Table C.1 – Test conditions . 162
Table R.1 – General fault/error conditions . 191
Table R.2 – Specific fault/error conditions . 193
Table R.3 – Semi-formal methods . 199
Table R.4 – Software architecture specification . 199
Table R.5 – Module design specification . 200
Table R.6 – Design and coding standards . 201
Table R.7 – Software safety validation . 201
Table T.1 – Minimum property retention limits after UV-C exposure . 205
Table T.2 – Minimum electric strength for internal wiring after UV-C exposure . 206
Table U.1 – Examples of acceptable measures against unauthorised access and
transmission fault/error modes . 209
– 6 – IEC 60335-2-12:2024 EXV © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a) patent(s).
IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect
thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which may
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not be held responsible for identifying any or all such patent rights.
This extended version (EXV) of the official IEC Standard provides the user with the full
content of the Standard.
made to IEC 60335-1:2020.
The specific content of IEC 60335-2-12:2024 is displayed on a blue background.
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 the IEC website.
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.
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: Particular requirements for warming plates and similar
appliances.
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.
– 8 – IEC 60335-2-12:2024 EXV © IEC 2024
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 document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations can 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.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.
INTRODUCTION to IEC 60335-1:2020
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.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website –
www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
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 the functions of an appliance are covered by different parts 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.
Throughout this publication, when "part 2" is mentioned, it refers to the relevant part of
IEC 60335.
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 publications, basic safety publications and group safety publications 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.
Individual countries may wish to consider the application of this standard, as far as is
reasonable, to appliances not mentioned in a part 2, and to appliances designed on new
principles. In this case, consideration should be given to defining normal operation, specifying
the classification of the appliance according to Clause 6 and specifying whether the appliance
is operated attended or unattended. Consideration should also be given to particular categories
of likely users and to related specific risks such as access to live parts, hot surfaces or
hazardous moving parts.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of this standard if, when examined and tested, it is found to
have other features which impair the level of safety covered by these requirements.
– 10 – IEC 60335-2-12:2024 EXV © IEC 2024
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 this
standard.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.
INTRODUCTION to IEC 60335-2-12:2024
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.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
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 can 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 publications, basic safety publications and group safety publications 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.
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.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.
– 12 – IEC 60335-2-12:2024 EXV © IEC 2024
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
1 Scope
This part of IEC 60335 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. 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.
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60034-1, Rotating electrical machines – Part 1: Rating and performance
IEC 60061-1, Lamp caps and holders together with gauges for the control of interchangeability
and safety – Part 1: Lamp caps
IEC 60065:2014, Audio, video and similar electronic apparatus – Safety requirements
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-31, Environmental testing – Part 2-31: Tests – Test Ec: Rough handling shocks,
primarily for equipment-type specimens
IEC 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady state
IEC TR 60083, Plugs and socket-outlets for domestic and similar general use standardized in
member countries of IEC
IEC 60085:2007, Electrical insulation – Thermal evaluation and designation
IEC 60112:2003, Method for the determination of the proof and the comparative tracking indices
of solid insulating materials
IEC 60112:2003/AMD1:2009
IEC 60127 (all parts), Miniature fuses
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
IEC 60227-5:2011, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 5: Flexible cables (cords)
IEC 60238, Edison screw lampholders
IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including 450/750 V
IEC 60252-1:2010, AC motor capacitors – Part 1: General – Performance, testing and rating –
Safety requirements – Guidance for installation and operation
IEC 60252-1:2010/AMD1:2013
IEC 60309-2, Plugs, socket-outlets and couplers for industrial purposes – Part 2: Dimensional
interchangeability requirements for pin and contact-tube accessories
IEC 60320 (all parts), Appliance couplers for household and similar general purposes
IEC 60320-1:2021, Appliance couplers for household and similar purposes – Part 1: General
requirements
___________
There exists a consolidated edition 4.1:2009 that includes edition 4 and its Amendment 1.
There exists a consolidated edition 2.1:2013 that includes edition 2 and its Amendment 1.
– 14 – IEC 60335-2-12:2024 EXV © IEC 2024
IEC 60320-2-3, Appliance couplers for household and similar general purposes – Part 2-3:
Appliance couplers with a degree of protection higher than IPX0
IEC 60320-3, Appliance couplers for household and similar general purposes – Part 3: Standard
sheets and gauges
IEC 60384-14:2013, Fixed capacitors for use in electronic equipment – Part 14: Sectional
specification – Fixed capacitors for electromagnetic interference suppression and connection
to the supply mains
IEC 60384-14:2013/AMD1:2016
IEC 60417, Graphical symbols for use on equipment
IEC 60445:2017, Basic and safety principles for man-machine interface, marking and
identification – Identification of equipment terminals, conductor terminations and conductors
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
IEC 60598-1:2014, Luminaires – Part 1: General requirements and tests
IEC 60598-1:2014/AMD1:2017
IEC 60603-11, Connectors for frequencies below 3 MHz for use with printed boards – Part 11:
Detail specification for concentric connectors (dimensions for free connectors and fixed
connectors)
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements
...
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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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
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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
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 the IEC website.
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.
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: Particular requirements for warming plates and similar
appliances.
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.
– 6 – IEC 60335-2-12:2024 © IEC 2024
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations can 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.
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.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
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 can 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 publications, basic safety publications and group safety publications 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.
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.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.
– 8 – IEC 60335-2-12:2024 © IEC 2024
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 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. 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.
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.
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60320-1:2021, Appliance couplers for household and similar purposes – Part 1: General
requirements
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.9 Modification:
normal operation
Replace the first paragraph with the following:
operation of the appliance under the following conditions:
The appliance is operated with a shallow pan, 150 mm in diameter and filled with water to a
height of at least 25 mm, placed on the heated surface. If vessels are supplied with the
appliance, or specified in the instructions, these are used instead.
The appliance is operated without a pan if this condition is more unfavourable.
3.6 Definitions relating to parts of appliances
3.6.101
functional surface
surface that is intentionally heated by an internal heat source and that has to be hot to carry
out the intended function of the appliance
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.
5.2 Addition:
If the test of 15.101 has to be carried out, three additional samples are required.
6 Classification
This clause of Part 1 is applicable.
– 10 – IEC 60335-2-12:2024 © IEC 2024
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances intended to be partially immersed in water for cleaning shall be marked with the
maximum level of immersion and with the substance of the following:
Do not immerse beyond this level.
When the provisions of footnote b to Table 101 apply, the appliance shall be marked with:
– the substance of "CAUTION: Hot surface", or
– symbol IEC 60417-5041 (2002-10).
7.6 Addition:
[symbol IEC 60417-5041 (2002-10)] caution, hot surface
7.12 Addition:
The instructions shall include the substance of the following:
This appliance is intended to be used in household and similar applications such as:
– staff kitchen areas in shops, offices and other working environments;
– farm houses;
– by clients in hotels, motels and other residential type environments;
– bed and breakfast type environments.
If the manufacturer wants to limit the use of the appliance to less than the above, this shall be
clearly stated in the instructions.
The instructions for appliances incorporating an appliance inlet and intended to be partially or
completely immersed in water for cleaning, shall state that the connector must be removed
before the appliance is cleaned and that the appliance inlet must be dried before the appliance
is used again.
The instructions for appliances intended to be used with a connector incorporating a thermostat
shall state that only the appropriate connector must be used.
The instructions for appliances having surfaces of glass-ceramic or similar material that forms
part of the enclosure of live parts shall include the substance of the following:
WARNING: Do not use the appliance if the surface is cracked.
The instructions for appliances that have to be used with particular vessels that are not supplied
shall specify the vessels to be used.
If symbol IEC 60417-5041 (2002-10) is marked on appliances, its meaning shall be explained
and the location of areas where the limits are exceeded shall be stated or shown by a drawing.
7.14 Addition:
The height of the triangle in symbol IEC 60417-5041 (2002-10) shall be at least 10 mm.
Compliance is checked by measurement.
7.15 Addition:
The marking specified for hot surfaces shall be clearly visible when the appliance is operated
as in normal use, including when actuating any switch, adjusting any control or opening a lid or
door. It shall not be placed on a functional surface or on surfaces that are exempted from the
limits of Table 101.
8 Protection against access to live parts
This clause of Part 1 is applicable except as follows.
8.1.1 Addition:
For parts of appliances situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18.
8.1.3 Addition:
Test probe 19 is not applied.
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.
11.2 Addition:
Portable appliances are placed away from the walls of the test corner.
11.3 Addition:
Where the external accessible surfaces are suitably flat and access permits, then the test
probe of Figure 101 is used to measure the temperature rises of external accessible surfaces
specified in Table 101. The probe is applied with a force of 4 N ± 1 N to the surface in such a
way that the best possible contact between the probe and the surface is ensured. The
measurement is performed after a contact period of 30 s.
The probe may be held in place using a laboratory stand clamp or similar device. Any measuring
instrument giving the same results as the probe may be used.
– 12 – IEC 60335-2-12:2024 © IEC 2024
11.7 Modification:
Replace the first paragraph with the following:
Appliances are operated until steady conditions are established.
11.8 Modification:
Replace the first paragraph with the following:
During the test, the temperature rises are monitored continuously and shall not exceed the
values shown in Table 3 and Table 101.
Addition:
When an appliance connector incorporates a thermostat, the temperature rise limit for the pins
of the inlet does not apply.
Table 101 – Maximum temperature rises of external accessible surfaces
under normal operating conditions
a
Temperature rise of external accessible surfaces
K
Surface
Appliances and parts situated Appliances and parts situated
not more than 850 mm above more than 850 mm above the
b
the floor after installation b
floor after installation
Bare metal 38 42
c
42 49
Coated metal
Glass and ceramic 51 56
d e
58 62
Plastic and plastic coating > 0,4 mm ,
NOTE The temperature rise limits of handles, knobs, grips, keyboards, keypads and similar parts are specified
in Table 3.
a
The following surfaces or elements shall not be taken into consideration:
– functional surfaces;
– handles or control knobs including keypads, keyboards and the like: part of the equipment that a user
needs to touch to operate or adjust the equipment. The equipment has to be installed according to the
manufacturer’s instructions;
– surfaces within 5 mm of touch controls regardless of their shape;
– surfaces within 25 mm of the outline of the functional surfaces;
– underside surfaces that are not accessible to a 75 mm diameter probe having a hemispherical end;
– lids and covers.
b
When the required values are not met, the maximum temperature rise shall not be higher than two times the
values indicated.
c
Metal is considered coated when a coating having a minimum thickness of 90 µm made of enamel, powder or
non-substantially plastic coating is used.
d
The temperature rise limit of plastic also applies for plastic material having a metal finish of thickness less
than 0,1 mm.
e
When the thickness of the plastic coating does not exceed 0,4 mm, the temperature rise limits of the coated
metal or of glass and ceramic material apply.
12 Charging of metal-ion batteries
This clause of Part 1 is applicable.
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.2 Addition:
For appliances that are intended to be used with particular metallic vessels, the vessels are
placed on the heated surface and connected to accessible metal parts. The metal foil is not
in contact with the heated surface.
For other appliances, vessels are not placed on the heated surface, the metal foil being in
contact with accessible surfaces of insulating material.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.2 Addition:
Appliances without containers, other than appliances intended to be used for warming crockery
only, are tested with 0,01 l of the spillage solution for each 100 cm of the heated surface. The
solution is poured steadily over the surface over a period of 1 min.
15.101 Appliances intended to be partially or completely immersed in water for cleaning shall
have adequate protection against the effects of immersion.
Compliance is checked by the following tests, which are carried out on three additional
appliances.
The appliances are operated under normal operation at 1,15 times rated power input, until
the thermostat operates for the first time. Appliances without a thermostat are operated until
steady conditions are established. The appliances are disconnected from the supply, any
appliance connector being withdrawn. They are then completely immersed in water containing
approximately 1 % NaCl and having a temperature between 10 °C and 25 °C, unless they are
marked with the maximum level of immersion, in which case they are immersed 50 mm deeper
than this level.
After 1 h, the appliances are removed from the saline solution. They are then dried, taking care
that all moisture is removed from the insulation around the pins of the appliance inlets, and are
then subjected to the leakage current test of 16.2.
This test is carried out four more times, after which the appliances shall withstand the electric
strength test of 16.3, the voltage being as specified in Table 4.
– 14 – IEC 60335-2-12:2024 © IEC 2024
The appliance having the highest leakage current after the fifth immersion is dismantled and
inspection shall show that there is no trace of liquid on insulation that could result in a reduction
of clearances and creepage distances below the values specified in Clause 29.
The remaining two appliances are operated under normal operation at 1,15 times rated power
input for 240 h. After this period, the appliances are disconnected from the supply and
immersed again for 1 h. They are then dried and subjected to the electric strength test of 16.3,
the voltage being as specified in Table 4.
Inspection shall show that there is no trace of liquid on insulation that could result in a reduction
of clearances and creepage distances below the values specified in Clause 29.
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Modification:
Instead of being subjected to the tests of 19.2 and 19.3, appliances are subjected to the test of
19.101.
19.101 The appliance is operated at rated power input with the heated surface completely
covered with felt strips for 7 h.
The felt strips have a width of 100 mm and are lined with a single layer of textile material. The
2 2
felt has a specific mass of 4 kg/m ± 0,4 kg/m and a thickness of approximately 25 mm. The
textile material consists of pre-washed double-hemmed cotton sheet having a mass between
2 2
140 g/m and 175 g/m in the dry condition.
If a thermostat operates, the test is repeated with the one-third of the heated surface furthest
from the temperature-sensing element covered.
20 Stability and mechanical hazards
This clause of Part 1 is applicable except as follows.
20.2 Addition:
For parts of appliances situated not more than 850 mm above the floor after installation or in
normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also applied
wherever test probe 18 is used and with the same test conditions used for test probe 18.
21 Mechanical strength
This clause of Part 1 is applicable except as follows.
21.1 Addition:
For appliances having surfaces of glass-ceramic or similar material that forms part of the
enclosure of live parts, three blows having an impact energy of 0,70 J are also applied to parts
of such surfaces that are not exposed to impacts during the test of 21.101.
21.101 Appliances having surfaces of glass-ceramic or similar material that forms part of the
enclosure of live parts, shall withstand the stresses liable to occur in normal use.
Compliance is checked by the following test.
A vessel with its base horizontal is dropped from a height of 150 mm onto the surface. The
vessel has a copper or aluminium base that is flat over a diameter of 120 mm ± 10 mm, its
edges being rounded with a radius of at least 10 mm. It is uniformly filled with at least 1,3 kg of
sand or shot so that the total mass is 1,80 kg ± 0,01 kg. The vessel is dropped 10 times.
The appliance is then supplied at rated voltage and operated until steady conditions are
established. A wet pad having dimensions approximately 100 mm × 100 mm is then applied to
the most unfavourable part of the surface. The pad is formed from a cotton sheet of
2 2
400 mm × 400 mm having a mass between 140 g/m and 175 g/m in the dry condition. The
sheet is folded four times to form the pad, which is then soaked with water containing
approximately 1 % NaCl.
The surface shall not be broken and the appliance shall withstand the leakage current test of
16.2.
22 Construction
This clause of Part 1 is applicable except as follows.
22.40 Addition:
Warming plates and similar appliances are not considered to be appliances that could give rise
to a hazard when operated continuously, automatically, or remotely.
22.49 Not applicable.
22.51 Not applicable.
22.101 Portable appliances shall not have openings on the underside that would allow small
items to penetrate and touch live parts.
Compliance is checked by inspection and by measuring the distance between the supporting
surface and live parts through openings. This distance shall be at least 6 mm. However, if the
appliance is fitted with legs, this distance is increased to 10 mm if the appliance is intended to
stand on the table and to 20 mm if it is intended to stand on the floor.
22.102 Thermal controls shall not be incorporated in connectors complying with the standard
sheets of IEC 60320-3.
Compliance is checked by inspection.
– 16 – IEC 60335-2-12:2024 © IEC 2024
23 Internal wiring
This clause of Part 1 is applicable.
24 Components
This clause of Part 1 is applicable except as follows.
24.1.5 Addition:
For appliance couplers incorporating thermostats, thermal cut-outs or fuses in the connector,
IEC 60320-1:2021 is applicable except that
– the earthing contact of the connector is allowed to be accessible, provided that this contact
is not likely to be gripped during insertion or withdrawal of the connector;
– the temperature required for the test of Clause 18 is that measured on the pins of the
appliance inlet during the heating test of Clause 11 of this standard;
– the breaking-capacity test of Clause 19 is carried out using the inlet of the appliance;
– the temperature rise of current-carrying parts specified in Clause 21 is not determined.
25 Supply connection and external flexible cords
This clause of Part 1 is applicable except as follows.
25.7 Addition:
Light polyvinyl chloride sheathed cord (code designation 60227 IEC 52) is allowed, irrespective
of the mass of the appliance.
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.
30.2.2 Not 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.
Key
A adhesive
B thermocouple wires 0,3 mm diameter according to IEC 60584-1 Type K
C handle arrangement permitting a contact force of 4 N ± 1 N
D polycarbonate tube: inside diameter 3 mm, outside diameter 5 mm
E tinned copper disc: 5 mm diameter, 0,5 mm thick with flat contact face
Figure 101 – Probe for measuring surface temperatures
– 18 – IEC 60335-2-12:2024 © IEC 2024
Annexes
The annexes of Part 1 are applicable except as follows.
Annex B
(normative)
Battery-operated appliances, detachable batteries
and separable batteries for battery-operated appliances
This annex of Part 1 is applicable except as follows:
B.22.3 For parts of appliances situated not more than 850 mm above the floor after installation
or in normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also
applied wherever test probe 18 is used and with the same test conditions used for test probe
18.
B.22.4 For parts of batteries situated not more than 850 mm above the floor after installation
or in normal use, in addition to the use of test probe 18, test probe 19 of IEC 61032 is also
applied wherever test probe 18 is used and with the same test conditions used for test probe 18.
– 20 – IEC 60335-2-12:2024 © IEC 2024
Bibliography
The Bibliography of Part 1 is applicable except as follows.
Addition:
IEC 60335-2-49, Household and similar electrical appliances – Safety – Part 2-49: Particular
requirements for commercial electric appliances for keeping food and crockery warm
IEC 60335-2-50, Household and similar electrical appliances – Safety – Part 2-50: Particular
requirements for commercial electric bains-marie
___________
– 22 – IEC 60335-2-12:2024 © IEC 2024
SOMMAIRE
AVANT-PROPOS . 24
INTRODUCTION . 27
1 Domaine d’application . 28
2 Références normatives . 29
3 Termes et définitions . 29
4 Exigence générale . 29
5 Conditions générales
...
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