IEC 60335-2-31:2024
(Main)Household and similar electrical appliances - Safety - Part 2-31: Particular requirements for range hoods and other cooking fume extractors
Household and similar electrical appliances - Safety - Part 2-31: Particular requirements for range hoods and other cooking fume extractors
IEC 60335-2-31:2024 deals with the safety of electric range hoods and other cooking fume extractors intended for installing above, beside, behind or under household cooking ranges, hobs and similar cooking appliances, their rated voltage being not more than 250 V including direct current (DC) supplied appliances. The cooking appliance can be supplied by electricity or other fuels, such as gas. Appliances not intended for normal household use but that nevertheless can be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard. As far as is practicable, this standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home. However, in general, it does not take into account
- persons (including children) whose physical, sensory or mental capabilities; or lack of experience and knowledge prevents them from using the appliance safely without supervision or instruction;
- children playing with the appliance.
Attention is drawn to the fact that
- for appliances incorporating electrostatic air filters, IEC 60335-2-65 also applies;
- for appliances intended to be used in vehicles or on board ships or 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, the national authorities responsible for buildings and similar authorities.
This standard does not apply to
- appliances intended for commercial purposes (IEC 60335-2-99);
- appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas).
This sixth edition cancels and replaces the fifth edition published in 2012, Amendment 1:2016 and Amendment 2:2018. 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, 22.8, 22.101, 22.102);
c) update of the installation requirements for the heating test to include down-draft systems (11.2);
d) addition of accessible surface temperature limits (11.3, 11.8);
e) introduction of IEC TR 62854 to determine compliance in case of doubt (22.14);
f) clarification of remote operation requirements for range hoods and other cooking fume extraction appliances (22.40, 22.49, 22.51);
g) clarification of 30.101 with respect to grease filters and odour extraction filters.
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 2-31: Exigences particulières pour les hottes de cuisine et autres extracteurs de fumées de cuisson
L'IEC 60335-2-31:2024 traite de la sécurité des hottes de cuisine électriques et autres extracteurs électriques de fumées de cuisson destinés à être installés au-dessus, à côté, derrière ou sous des cuisinières, tables de cuisson ou appareils de cuisson analogues, dont la tension assignée est inférieure ou égale à 250 V, y compris les appareils alimentés en courant continu. Les appareils de cuisson peuvent être alimentés à l'électricité ou avec d'autres combustibles, tels que le gaz. Les appareils non destinés à un usage domestique normal, mais qui peuvent néanmoins constituer une source de danger pour le public, tels que les appareils destinés à être utilisés par des utilisateurs non avertis dans des magasins, chez des artisans et dans des fermes, sont compris dans le domaine d'application de la présente norme. Dans la mesure du possible, la présente norme traite des dangers courants que présentent les appareils et auxquels sont exposés tous les individus situés 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;
- des enfants qui jouent avec l'appareil.
L'attention est attirée sur le fait que
- pour les appareils qui comportent des filtres à air électrostatiques, l'IEC 60335-2-65 s'applique également;
- pour les appareils destinés à être utilisés dans des véhicules ou à bord de navires ou d'avions, des exigences supplémentaires peuvent être nécessaires;
- dans de nombreux pays, des exigences supplémentaires sont spécifiées par les organismes nationaux de la santé, par les organismes nationaux responsables de la protection des travailleurs, par les organismes nationaux responsables du bâtiment et par des organismes similaires.
La présente norme ne s'applique pas:
- aux appareils destinés à des usages commerciaux (IEC 60335-2-99);
- aux appareils destinés à être utilisés dans des locaux qui présentent des conditions particulières, telles que la présence d'une atmosphère corrosive ou explosive (poussière, vapeur ou gaz).
Cette sixième édition annule et remplace la cinquième édition parue en 2012, l'Amendement 1:2016 et l'Amendement 2:2018. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) le texte a été aligné sur l'IEC 60335-1:2020;
b) certaines notes ont été converties en texte normatif (Article 1, 22.8, 22.101, 22.102);
c) les exigences d’installation pour l’essai de chauffage ont été mises à jour afin d’inclure les systèmes d'extraction à flux descendant (11.2) ;
d) des limites de température ont été ajoutées pour les surfaces accessibles (11.3, 11.8);
e) une référence à l'IEC TR 62854 a été ajoutée afin de déterminer la conformité en cas de doute (22.14) ;
f) les exigences de fonctionnement à distance des hottes de cuisine et autres appareils d’extraction des fumées de cuisson ont été clarifées (22.40, 22.49, 22.51) ;
g) la vérification des filtres à graisse et des filtres pour l’extraction des odeurs a été clarifiée (30.101).
La présente partie 2 doit être utilisée conjointement avec la dernière édition de l'IEC 60335-1 et ses amendements sauf si cette édition l'exclut. Dans ce cas, la dernière édition qui n'exclut pas la présente partie 2 est utilisée. Elle a été établie sur la base de la sixième édition (2020) de cette norme.
General Information
Relations
Overview
IEC 60335-2-31:2024 (Edition 6.0) is the international safety standard for range hoods and other cooking fume extractors intended for installation above, beside, behind or under household cooking ranges, hobs and similar appliances. It covers electrically supplied appliances rated up to 250 V (including DC) and appliances used with other fuels (e.g., gas). This sixth edition is a technical revision that supersedes the 2012 edition and its amendments, and is to be used together with the latest IEC 60335-1 (general safety requirements).
Key topics and technical requirements
- Scope and exclusions: applies to household and similar appliances (including layman use in shops, light industry and farms); excludes commercial appliances (see IEC 60335-2-99) and devices intended for corrosive or explosive atmospheres or certain transport applications without additional requirements.
- Alignment with Part 1: supplements or modifies IEC 60335-1; where not mentioned, Part 1 applies.
- Electrical safety and tests: general requirements for leakage current, dielectric strength, transient overvoltages, moisture resistance, and overload protection consistent with household appliance safety testing.
- Heating and temperature control: updated installation requirements for the heating test, including provisions for down-draft systems; new limits for accessible surface temperatures to reduce burn risk.
- Construction and components: detailed construction clauses, internal wiring, earthing, terminals, grease/odour extraction filters and filter-related safety (clarified provisions for grease filters and odour extraction filters).
- Operational safety: endurance, abnormal operation, mechanical hazards, remote operation requirements (clarified for range hoods and extraction appliances).
- Special features: guidance where electrostatic air filters are fitted (IEC 60335-2-65 also applies) and the introduction of IEC TR 62854 for compliance determination in case of doubt.
- Testing and markings: marking, instructions for safe use and pictograms (e.g., replace cracked protective shield), and specific test layouts and probes referenced.
Practical applications - who uses this standard
- Appliance manufacturers and product designers to ensure safe design and compliance of residential range hoods and extractors.
- Test laboratories and certification bodies performing type and safety testing.
- Safety and compliance engineers documenting conformity to international electrical and thermal safety requirements.
- Regulators and national standards bodies adopting IEC requirements or mapping national rules to international practice.
- Installers and specifiers referencing installation, mounting and user instruction requirements.
Related standards
- IEC 60335-1 (household appliance general requirements) - mandatory companion document.
- IEC 60335-2-65 - for appliances with electrostatic air filters.
- IEC 60335-2-99 - commercial cooking appliances (exclusion reference).
- IEC TR 62854 - used to determine compliance in doubtful cases.
Keywords: IEC 60335-2-31, range hoods safety, cooking fume extractors standard, household appliance safety, accessible surface temperature, heating test, grease filters, IEC 60335-1.
Standards Content (Sample)
IEC 60335-2-31 ®
Edition 6.0 2024-02
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-31: Particular requirements for range hoods and other cooking fume
extractors
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IEC 60335-2-31 ®
Edition 6.0 2024-02
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-31: Particular requirements for range hoods and other cooking fume
extractors
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120, 97.040.20 ISBN 978-2-8322-8324-0
– 2 – IEC 60335-2-31:2024 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 . 10
7 Marking and instructions . 10
8 Protection against access to live parts . 12
9 Starting of motor-operated appliances . 13
10 Power input and current . 13
11 Heating . 13
12 Void Charging of metal-ion batteries . 15
13 Leakage current and electric strength at operating temperature . 15
14 Transient overvoltages . 15
15 Moisture resistance . 15
16 Leakage current and electric strength . 16
17 Overload protection of transformers and associated circuits . 16
18 Endurance . 16
19 Abnormal operation . 16
20 Stability and mechanical hazards . 16
21 Mechanical strength . 17
22 Construction . 17
23 Internal wiring . 19
24 Components . 19
25 Supply connection and external flexible cords . 19
26 Terminals for external conductors . 19
27 Provision for earthing . 19
28 Screws and connections . 19
29 Clearances, creepage distances and solid insulation . 20
30 Resistance to heat and fire . 20
31 Resistance to rusting. 20
32 Radiation, toxicity and similar hazards . 21
Annexes . 24
Bibliography . 25
List of comments . 26
Figure 101 – "Replace any cracked protective shield" pictogram . 21
Figure 101 102 – Hob layout for the heating test . 22
Figure 103 – Probe for measuring surface temperatures . 23
Table 101 – Maximum temperature rises for specified external accessible surfaces
under normal operating conditions . 15
– 4 – IEC 60335-2-31:2024 CMV © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-31: Particular requirements for range hoods
and other cooking fume extractors
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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 60335-2-31:2024 edition 6.0
allows the user to identify the changes made to the previous IEC 60335-2-
31:2012+AMD1:2016+AMD2:2018 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 60335-2-31 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 2012, Amendment 1:2016
and Amendment 2:2018. 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, 22.8, 22.101, 22.102);
c) update of the installation requirements for the heating test to include down-draft systems
(11.2);
d) addition of accessible surface temperature limits (11.3, 11.8);
e) introduction of IEC TR 62854 to determine compliance in case of doubt (22.14);
f) clarification of remote operation requirements for range hoods and other cooking fume
extraction appliances (22.40, 22.49, 22.51);
g) clarification of 30.101 with respect to grease filters and odour extraction filters.
The text of this International Standard is based on the following documents:
Draft Report on voting
61/7090/FDIS 61/7105/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/standardsdev/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 range hoods and other
cooking fume extractors.
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;
– 6 – IEC 60335-2-31:2024 CMV © IEC 2024
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The committee has decided that the contents of this 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.
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.
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 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 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.
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. 1
– 8 – IEC 60335-2-31:2024 CMV © IEC 2024
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-31: Particular requirements for range hoods
and other cooking fume extractors
1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 deals with the safety of electric range hoods and other cooking fume
extractors intended for installing above, beside, behind or under household cooking ranges,
hobs and similar cooking appliances, their rated voltage being not more than 250 V including
direct current (DC) supplied appliances. 2
NOTE 101 The cooking appliance can be supplied by electricity or other fuels, such as gas.
Appliances not intended for normal household use but that nevertheless may can be a source
of danger to the public, such as appliances intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by appliances
that are encountered by all persons in and around the home. However, in general, it does not
take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
NOTE 102 Attention is drawn to the fact that
– for appliances incorporating electrostatic air filters, IEC 60335-2-65 also applies;
– for appliances intended to be used in vehicles or on board ships or aircraft, additional
requirements could can be necessary;
– in many countries additional requirements are specified by the national health authorities,
the national authorities responsible for the protection of labour, the national authorities
responsible for buildings and similar authorities.
NOTE 103 This standard does not apply to
– appliances intended for commercial purposes (IEC 60335-2-99);
– appliances intended to be used in locations where special conditions prevail, such as the
presence of a corrosive or explosive atmosphere (dust, vapour or gas).
2 Normative references
This clause of Part 1 applies except as follows:
Addition:
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
IEC 61231, International lamp coding system (ILCOS)
IEC TR 62854:2014, Sharp edge testing apparatus and test procedure for lighting equipment −
Tests for sharpness of edge
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.5 Definitions relating to types of appliances
3.5.101
range hood
motor-operated appliance intended to collect contaminated air from above a hob
Note 1 to entry: The filtered air may be discharged back into the room or ducted away.
3.5.102
down-draft system
ventilation system intended for installation adjacent to household cooking ranges, hobs and
similar cooking appliances that draws contaminated air down into an internal exhaust duct
Note 1 to entry: The filtered air may be discharged back into the room or ducted away.
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.
5.7 Addition:
For down-draft systems, the tests specified in Clauses 11 and 13 are carried out at an ambient
temperature of 40 °C ± 2 °C.
5.10 Modification Addition:
Unless otherwise stated, Appliances are not connected to a duct.
5.101 Down-draft systems intended to be installed above the close to a cooking surface are
tested as specified for range hoods.
– 10 – IEC 60335-2-31:2024 CMV © IEC 2024
6 Classification
This clause of Part 1 is applicable.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances shall be marked on or near the lampholder with the maximum power input of
replaceable lamps as follows:
lamp max …. W
The word "lamp" may be replaced by symbol IEC 60417-5012 (2002-10).
If the voltage rating of the lamp is less than the rated voltage of the appliance, the voltage
rating of the lamp shall also be marked on or near the lampholder.
Range hoods intended to be used with self-shielded tungsten halogen lamps or metal halide
lamps only shall be marked with symbol “Use only with self-shielded tungsten halogen lamps
or self-shielded metal halide lamps” IEC 60417-6030 (2009-11) or with the substance of the
following:
Use only with self-shielded tungsten halogen lamps or self-shielded metal halide lamps. 3
Range hoods incorporating a protective shield required in 22.104 shall be marked with symbol
“Replace any cracked shield” the pictogram of Figure 101 or with the substance of the following:
Replace any cracked protective shield 4
7.6 Addition:
Use only with self-shielded
tungsten halogen lamps or self-
[symbol IEC 60417-6030
shielded metal halide lamps
(2009-11)]
use only with self-shielded
IEC
lamp
Replace any cracked shield
IEC
7.12 Addition:
The instructions shall state the substance of the following:
– there shall be adequate ventilation of the room when the range hood is used at the same
time as appliances burning gas or other fuels (not applicable to appliances that only
discharge the air back into the room);
– the details concerning the method and frequency of cleaning;
– there is a fire risk if cleaning is not carried out in accordance with the instructions;
– do not flambé under the range hood;
– CAUTION: Accessible parts may become hot when used with cooking appliances.
The instructions shall state the substance of the following:
– lamp type, shape description and image;
– rated wattage of the intended lamp;
– max wattage of a potential replacement lamp;
– rated voltage or voltage range of lamp or, for pre-heat starting fluorescent lamps starter
replacement details;
– the type of lamp cap;
– nominal dimension(s) of lamp.
An ILCOS D code (standard version code specified in IEC 61231) including both the letter and
figure sections is considered to provide the required instructions.
NOTE 101 Some examples of the required marking using the ILCOS D code are as follows:
Example 1 (for tungsten filament lamps – incandescent lamps):
Use type lamp (or use in alternative type lamp) IAA/C-40-220/230240-E27-60 (ILCOS D code in according to standard
IEC 61231).
– Tungsten filament lamp – clear pear-shaped lamp
– Max wattage: 40 W
– Voltage range: 220 V – 240 V
– Dimensions: Nominal diameter 60 mm.
Example 2 (for fluorescent lamps):
Use type lamp (or use in alternative type lamp) FBRI-23-230/240-E14-82/127 (ILCOS D code in according to standard
IEC 61231).
– Self-ballasted fluorescent reflector lamp – Integral induction type ballast
– Max wattage: 23 W
– Voltage range: 230 V – 240 V
– Dimensions: diameter 82 mm/length 127 mm.
If symbol “Use only with self-shielded tungsten halogen lamps IEC 60417-6030 (2009-11) or
self-shielded metal halide lamps” or symbol “Replace any cracked shield” the pictogram of
Figure 101 is used, its meaning shall be explained.
7.12.1 Addition:
The installation instructions shall include the substance of the following:
– the air must not be discharged into a flue that is used for exhausting fumes from appliances
burning gas or other fuels (not applicable to appliances that only discharge the air back into
the room);
– the minimum distance between the supporting surface for the cooking vessels on the hob
and the lowest part of the range hood. (When the range hood is located above a gas
appliance, this distance shall be at least 65 cm. If the instructions for installation for the gas
hob specify a greater distance, this has to be taken into account. The distance of 65 cm can
be reduced for
• non-combustible parts of range hoods, or
• parts operating at safety extra low voltage,
provided these parts do not give access to live parts if deformed);
– regulations concerning the discharge of air have to be fulfilled.
– 12 – IEC 60335-2-31:2024 CMV © IEC 2024
If the range hood is only intended to be installed over a hob with no more than four hob
elements, this shall be stated.
The installation instructions for range hoods with accessible metallic enclosures of class II
construction shall include details that indicate the location and maximum permitted lengths for
any fixing or mounting screw or other fixing device that penetrates into the range hood to attach
an accessory such as a facia or duct fitting.
Where fixing or mounting screws or other fixing devices are used, that penetrate into the range
hood with an accessible metallic enclosure of class II construction, to attach an accessory,
the instructions shall indicate the required location of these screws or fixing devices and include
the substance of the following warning.
Warning: Failure to install the screws or fixing device in accordance with these instructions
may result in electrical hazards
The warning shall be in the same part of the instructions that include details of how to mount
the equipment.
The installation instructions for down-draft systems shall also include the substance of the
following:
– the following warning (for down-draft systems not intended to be used with gas hobs):
CAUTION: This appliance is not intended to be used with gas hobs.
– details of the gas appliance (for down-draft systems intended to be used together with gas
hobs).
– for down-draft systems not intended to be used with gas hobs, the substance of the
following warning:
CAUTION: This appliance is not intended to be used with gas hobs.
– for down-draft systems intended to be used together with gas hobs, details of the gas
appliance.
NOTE 101 This information can only be given if the down-draft system has been tested in conjunction with
the designated appliance.
7.14 Addition:
The height of symbol “Use only with self-shielded tungsten halogen lamps or self-shielded metal
halide lamps” or symbol “Replace any cracked shield”IEC 60417-6030 (2009-11) and the
pictogram of Figure 101 shall be at least 15 mm.
7.15 Addition:
The marking for maximum power input of a replaceable lamp shall be visible during replacement
of the lamp.
Symbol IEC 60417-6030 (2009-11) or the marking "Use only with self-shielded tungsten
halogen lamps or self-shielded metal halide lamps" or the marking “Use only with self-shielded
tungsten halogen lamps or self-shielded metal halide lamps” shall be visible during replacement
of the lamp. Symbol “Replace any cracked shield” or the marking “Replace any cracked shield”
The pictogram of Figure 101 or the marking "Replace any cracked protective shield" shall be
visible when the appliance is installed as in normal use.
8 Protection against access to live parts
This clause of Part 1 is applicable except as follows.
8.1.1 Addition:
Test probe 18 is not applicable to parts that according to the instructions are intended to be
installed more than 1,8 m above the floor. 5
8.2 Addition:
After the removal of detachable parts during user maintenance, the basic insulation of
internal wiring may be touched provided it is electrically equivalent to the insulation of cords
complying with IEC 60227 or IEC 60245.
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 Replacement:
Built-in appliances are installed in accordance with the instructions. Other appliances are fixed
to a vertical support.
The appliance is located above a hob so that the distance between its lowest point and the hob
surface is the minimum distance specified in the instructions. For down-draft systems, the
appliance is located at the minimum distance to the cooking surface specified in the instructions. 6
A vertical side wall extending to the top of the range hood is placed at right angles to the
vertical support, 100 mm from one side of the range hood. Dull black-painted plywood
approximately 20 mm thick is used for the vertical support, the side wall and for the installation
of built-in range appliances.
If the range hood or down-draft system is intended to be installed over used with a hob having
four hob elements, the hob shall have two 2 kW electric elements at the back and two 1,5 kW
electric elements at the front.
If the range hood or down-draft system is intended to be installed over used with a hob having
six hob elements, the hob shall have three 2 kW electric elements at the back and three 1,5 kW
electric elements at the front.
The layout of the hobs used in the tests is shown in Figure 101 Figure 102. The hobs are
centrally situated with respect to the range hood.
Vessels, without lids, containing water are placed on the hob elements. The diameter of the
vessels is approximately equal to that of the hob elements. The hob elements are operated to
maintain vigorous boiling.
The appliance is also tested without the hob elements in operation.
– 14 – IEC 60335-2-31:2024 CMV © IEC 2024
For appliances delivered for installation with the control and filter boxes separate from the fan,
the duct length on input and output shall be 4 times fan diameter. However, if the fan is intended
to be mounted on the external structure of a building, the fan is not ducted on the output side.
11.3 Addition:
Where the external accessible surfaces are suitably flat and access permits, then the test
probe of Figure 103 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. 7
11.7 Replacement Modification:
Replace the first paragraph with the following: 8
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. 9
Addition:
The temperature rise limit for external enclosures, external accessible surfaces and wood
does not apply when the hob elements are in operation. When the appliance is tested without
the hob elements in operation, only the temperature rises of the external enclosures, external
accessible surfaces and wood are measured, the temperature rise limit for wood being 65 K.
Temperature rises of lampholders and the enclosure are also determined with the fan motor
switched off and lights switched on. Enclosure temperatures are not measured within a distance
of 35 mm around the lamp glass regardless of its shape.
For down-draft systems, the temperature rises shall not exceed the values given in Table 3
reduced by 15 K.
The temperature rise of handles or grips of vents and air shutters shall not exceed the value
specified in Table 3 for surfaces of handles, knobs, grips and similar parts which are held for
short periods only in normal use. 10
Table 101 – Maximum temperature rises for specified external
accessible surfaces under normal operating conditions
a, b
Surface
Temperature rise of external accessible surfaces
K
Bare metal 42
c
Coated metal
Glass and ceramic 56
d, e
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
Within 25 mm from air outlets, the above limits are increased by 5 K.
b
Temperature rise on surfaces that are inaccessible to a 75 mm diameter probe having a hemispherical end.
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 coated metal
for underlying metal apply or the temperature rise limits for glass or ceramic material for underlying glass or
ceramic material apply.
12 Void Charging of metal-ion batteries
This clause of Part 1 is applicable. 11
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.1.1 Addition:
The outer part of fans intended to be installed in the external structure of a building is subjected
to the test of IEC 60529:1989, 14.2.4 a), the part of the fan not mounted on the outside surface
being protected against spray from the oscillating tube. The test is carried out with the appliance
in the rest position and then in operation while supplied at rated voltage, shutters or similar
devices being in the open position.
15.2 Addition:
A vessel with 0,5 l water containing approximately 1 % NaCl of the spillage solution is poured
steadily over a period of 15 s over critical parts of a down-draft system. 12
– 16 – IEC 60335-2-31:2024 CMV © IEC 2024
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 Addition:
Appliances are also subjected to the test of 19.101.
19.13 Addition:
During the test of 19.101, the temperature of the motor windings shall not exceed the values
specified in Table 8. The appliance shall not deform to such an extent that parts fall from it.
19.101 Appliances are operated above a hob as specified in Clause 11, but without vessels
and with only the two outer hob elements at the back being energized.
20 Stability and mechanical hazards
This clause of Part 1 is applicable except as follows.
20.2 Addition:
Filters are considered to be detachable parts and shall be removed unless a tool is required
for removal. 13
Test probe 18 is not applicable to parts that according to the instructions are intended to be
installed more than 1,8 m above the floor. 14
20.101 If a part of a range hood or down-draft system can be moved automatically, there
shall be no risk of entrapment or injury.
Compliance is checked by the following test.
The appliance is operated at rated voltage and is operated to open and close the driven part.
The driven part shall
a) decelerate to a speed lower than 15 mm/s in the last 50 mm of the movement, as it
approaches any position in which entrapment may can occur; or
b) when IEC 61032 probe 32 is placed at any potential entrapment point across the width and
height of the opening:
– stop and reverse direction before contacting the probe; or
– if the probe is touched by the driven part:
• not exert a force on the probe exceeding a value of 100 N; or
• not subject the probe to a shear force.
If compliance relies on the operation of an electronic circuit, the test is repeated under the
following conditions applied separately:
– the fault conditions in a) to g) of 19.11.2, are applied one at a time to the electronic circuit;
– the electromagnetic phenomena tests of 19.11.4.2 and 19.11.4.5 are applied in turn to the
appliance. The tests are carried out with surge protective devices disconnected, unless they
incorporate spark gaps. 15
The driven part shall
a) decelerate to a speed lower than 15 mm/s in the last 50 mm of the movement, as it
approaches any position in which entrapment may can occur; or
b) when IEC 61032 probe 32 is placed at any potential entrapment point across the width and
height of the opening:
– stop and reverse direction before contacting the probe; or
– if the probe is touched by the driven part:
• not exert a force on the probe exceeding a value of 100 N; or
• not subject the probe to a shear force.
21 Mechanical strength
This clause of Part 1 is applicable.
22 Construction
This clause of Part 1 is applicable except as follows.
22.8 Replacement:
For appliances having compartments to which access is gained during user maintenance, the
electrical connections, other than those of interconnection cords intended to be disconnected
before cleaning or user maintenance, shall be arranged so that they are not subjected to
pulling during cleaning or other user maintenance.
Compliance is checked by inspection and by the following test.
Detachable parts are removed. It shall not be possible to grasp wiring likely to that can be
touched in such a way that the connections are subjected to undue stress.
In case of doubt, the wiring is subjected to a pull of 10 N, applied without jerks three times in
succession, in the most unfavourable direction likely to that can occur during user
maintenance. There shall be no appreciable displacement of the connections.
NOTE 101 Interconnection cords intended to be disconnected before cleaning or user maintenance are not
subjected to the test.
22.14 Modification:
Replace the last paragraph with the following:
– 18 – IEC 60335-2-31:2024 CMV © IEC 2024
Compliance is checked by inspection and, in case of doubt, by the test described in
IEC TR 62854:2014, Clause 2 and Clause 5. 16
22.40 Addition:
Range hoods and other cooking fume extractors are considered to be appliances that can
operate continuously, automatically or remotely without giving rise to a hazard.
22.49 Not applicable.
22.51 Not applicable. 17
22.101 Appliances shall be constructed so that they can be fixed securely to a wall or other
support. Brackets and similar means shall be of metal that shall not be liable to creep or deform.
Compliance is checked by inspection.
NOTE Keyhole slots, hooks and similar means, without any further means to prevent the
appliance from being inadvertently lifted off the support, are not considered to be adequate
means for fixing the appliance securely.
Compliance is checked by
...
IEC 60335-2-31 ®
Edition 6.0 2024-02
EXTENDED VERSION
INTERNATIONAL
STANDARD
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inside
This extended version of IEC 60335-2-31:2024 includes the content of the references made to
IEC 60335-1:2020
Household and similar electrical appliances – Safety –
Part 2-31: Particular requirements for range hoods and other cooking fume
extractors
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IEC 60335-2-31 ®
Edition 6.0 2024-02
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60335-2-31:2024 includes the content of the references made to
IEC 60335-1:2020
Household and similar electrical appliances – Safety –
Part 2-31: Particular requirements for range hoods and other cooking fume
extractors
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120, 97.040.20 ISBN 978-2-8322-8325-7
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 60335-2-31:2024 EXV © IEC 2024
CONTENTS
FOREWORD . 6
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 15
4 General requirement . 27
5 General conditions for the tests . 27
6 Classification . 31
7 Marking and instructions . 32
8 Protection against access to live parts . 42
9 Starting of motor-operated appliances . 44
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 . 54
14 Transient overvoltages . 57
15 Moisture resistance . 58
16 Leakage current and electric strength . 61
17 Overload protection of transformers and associated circuits . 63
18 Endurance . 63
19 Abnormal operation . 63
20 Stability and mechanical hazards . 74
21 Mechanical strength . 76
22 Construction . 77
23 Internal wiring . 91
24 Components . 93
25 Supply connection and external flexible cords . 98
26 Terminals for external conductors . 106
27 Provision for earthing . 108
28 Screws and connections . 110
29 Clearances, creepage distances and solid insulation . 112
30 Resistance to heat and fire . 121
31 Resistance to rusting . 125
32 Radiation, toxicity and similar hazards . 126
Annex A (informative) Routine tests . 142
Annex B (normative) Battery-operated appliances, separable batteries and detachable
batteries for battery-operated appliances . 144
Annex C (normative) Ageing test on motors . 165
Annex D (normative) Thermal motor protectors . 166
Annex E (normative) Needle-flame test . 167
Annex F (normative) Capacitors . 168
Annex G (normative) Safety isolating transformers . 170
Annex H (normative) Switches . 171
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 173
Annex J (normative) Coated printed circuit boards . 175
Annex K (informative) Overvoltage categories . 176
Annex L (informative) Guidance for the measurement of clearances and creepage
distances . 177
Annex M (informative) Pollution degree . 180
Annex N (normative) Proof tracking test . 181
Annex O (informative) Selection and sequence of the tests of Clause 30 . 182
Annex P (informative) Guidance for the application of this standard to appliances
used in tropical climates . 187
Annex Q (informative) Sequence of tests for the evaluation of electronic circuits . 189
Annex R (normative) Software evaluation . 192
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 . 206
Annex T (normative) UV-C radiation effect on non-metallic materials . 207
Annex U (normative) Appliances intended for remote communication through public
networks . 210
Bibliography . 214
Index of defined terms . 217
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 . 127
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 . 128
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 . 129
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 . 130
Figure 5 – Small part . 131
Figure 6 – Example of an electronic circuit with low-power points . 131
Figure 7 – Test finger nail . 132
Figure 8 – Flexing test apparatus . 133
Figure 9 – Constructions of cord anchorages . 134
Figure 10 – An example of parts of an earthing terminal . 135
Figure 11 – Examples of clearances . 136
Figure 12 – Example of the placement of the cylinder . 137
Figure 13 – Small parts cylinder . 138
Figure 14 – Example of a specified operating region of a lithium-ion cell during
charging . 139
Figure 101 – "Replace any cracked protective shield" pictogram . 139
Figure 102 – Hob layout for the heating test. 140
Figure 103 – Probe for measuring surface temperatures . 141
– 4 – IEC 60335-2-31:2024 EXV © IEC 2024
Figure B.1 – Examples of battery-operated appliance constructions and application of
normative Annex B (1 of 2) . 162
Figure B.2 – Examples of correct polarity connection marking representing three
batteries . 164
Figure I.1 – Simulation of faults . 174
Figure L.1 – Sequence for the determination of clearances . 177
Figure L.2 – Sequence for the determination of creepage distances . 178
Figure L.3 – Measurement of clearances . 179
Figure O.1 – Tests for resistance to heat . 182
Figure O.2 – Selection and sequence of tests for resistance to fire in hand-held
appliances . 183
Figure O.3 – Selection and sequence of tests for resistance to fire in attended
appliances . 183
Figure O.4 – Selection and sequence of tests for resistance to fire in unattended
appliances . 184
Figure O.5 – Some applications of the term "within a distance of 3 mm" . 186
Figure Q.1 – Flowchart outlining the sequence of tests for the evaluation of electronic
circuits (1 of 2) . 190
Figure S.1 – Flowchart giving guidance on measurement of power input and current
concerning the representative period . 206
Table 1 – Power input deviation . 45
Table 2 – Current deviation . 46
Table 3 – Maximum normal temperature rises . 49
Table 101 – Maximum temperature rises for specified 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. 62
Table 8 – Maximum winding temperature . 66
Table 9 – Maximum abnormal temperature rise . 71
Table 10 – Dimensions of cables and conduits . 99
Table 11 – Minimum cross-sectional area of conductors . 101
Table 12 – Pull force and torque . 103
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 . 114
Table 17 – Minimum creepage distances for basic insulation . 118
Table 18 – Minimum creepage distances for functional insulation . 119
Table 19 – Minimum thickness for accessible parts of reinforced insulation consisting
of a single layer . 121
Table A.1 – Test voltages . 143
Table B.1 – Artificial source characteristics . 146
Table B.2 – Total area of openings for metal-ion cells . 154
Table B.3 – Volume of air injected at 2 070 kPa . 154
Table C.1 – Test conditions . 165
Table R.1 – General fault/error conditions . 194
Table R.2 – Specific fault/error conditions . 196
Table R.3 – Semi-formal methods . 202
Table R.4 – Software architecture specification . 202
Table R.5 – Module design specification . 203
Table R.6 – Design and coding standards . 204
Table R.7 – Software safety validation . 204
Table T.1 – Minimum property retention limits after UV-C exposure . 208
Table T.2 – Minimum electric strength for internal wiring after UV-C exposure . 209
Table U.1 – Examples of acceptable measures against unauthorised access and
transmission fault/error modes . 212
– 6 – IEC 60335-2-31:2024 EXV © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-31: Particular requirements for range hoods
and other cooking fume extractors
FOREWORD
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This extended version (EXV) of the official IEC Standard provides the user with the
comprehensive content of the Standard.
made to IEC 60335-1:2020.
The specific content of IEC 60335-2-31:2024 is displayed on a blue background.
IEC 60335-2-31 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 2012, Amendment 1:2016
and Amendment 2:2018. 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, 22.8, 22.101, 22.102);
c) update of the installation requirements for the heating test to include down-draft systems
(11.2);
d) addition of accessible surface temperature limits (11.3, 11.8);
e) introduction of IEC TR 62854 to determine compliance in case of doubt (22.14);
f) clarification of remote operation requirements for range hoods and other cooking fume
extraction appliances (22.40, 22.49, 22.51);
g) clarification of 30.101 with respect to grease filters and odour extraction filters.
The text of this International Standard is based on the following documents:
Draft Report on voting
61/7090/FDIS 61/7105/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/standardsdev/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 range hoods and other
cooking fume extractors.
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.
– 8 – IEC 60335-2-31:2024 EXV © IEC 2024
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The committee has decided that the contents of this 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 publication 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.
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.
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 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 and generic standards 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.
– 10 – IEC 60335-2-31:2024 EXV © IEC 2024
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-31: Particular requirements for range hoods
and other cooking fume extractors
1 Scope
This part of IEC 60335 deals with the safety of electric range hoods and other cooking fume
extractors intended for installing above, beside, behind or under household cooking ranges,
hobs and similar cooking appliances, their rated voltage being not more than 250 V including
direct current (DC) supplied appliances.
NOTE 101 The cooking appliance can be supplied by electricity or other fuels, such as gas.
Appliances not intended for normal household use but that nevertheless can be a source of
danger to the public, such as appliances intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by appliances
that are encountered by all persons in and around the home. However, in general, it does not
take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
Attention is drawn to the fact that
– for appliances incorporating electrostatic air filters, IEC 60335-2-65 also applies;
– for appliances intended to be used in vehicles or on board ships or 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, the national authorities
responsible for buildings and similar authorities.
This standard does not apply to
– appliances intended for commercial purposes (IEC 60335-2-99);
– appliances intended to be used in locations where special conditions prevail, such as the
presence of a corrosive or explosive atmosphere (dust, vapour or gas).
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, Appliance couplers for household and similar general purposes – Part 1: General
requirements
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
___________
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.
– 12 – IEC 60335-2-31:2024 EXV © IEC 2024
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 and tests
IEC 60664-3:2016, Insulation coordination for equipment within low-voltage systems – Part 3:
Use of coating, potting or moulding for protection against pollution
IEC 60664-4:2005, Insulation coordination for equipment within low-voltage systems – Part 4:
Consideration of high-frequency voltage stress
IEC 60691, Thermal-links – Requirements and application guide
IEC 60695-2-11:2014, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products (GWEPT)
IEC 60695-2-12, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods – Glow-
wire flammability index (GWFI) test method for materials
IEC 60695-2-13, Fire hazard testing – Part 2-13: Glowing/hot-wire based test methods – Glow-
wire ignition temperature (GWIT) test method for materials
IEC 60695-10-2, Fire hazard testing – Part 10-2: Abnormal heat – Ball pressure test
___________
There exists a consolidated edition 4.1:2016 that includes edition 4 and its Amendment 1.
There exists a consolidated edition 2.2:2013 that includes edition 2 and its Amendment 1 and Amendment 2.
There exists a consolidated edition 8.1:2017 that includes edition 8 and its Amendment 1.
IEC 60695-11-5:2016, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method
– Apparatus, confirmatory test arrangement and guidance
IEC 60695-11-10, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and vertical
flame test methods
IEC 60730-1:2013, Automatic electrical controls – Part 1: General requirements
IEC 60730-1:2013/AMD1:2015
IEC 60730-2-8:2018, Automatic electrical controls – Part 2-8: Particular requirements for
electrically operated water valves, including mechanical requirements
IEC 60730-2-9:2015, Automatic electrical controls – Part 2-9: Particular requirements for
temperature sensing controls
IEC 60730-2-9:2015/AMD1:2018
IEC 60730-2-10, Automatic electrical controls for household and similar use – Part 2-10:
Particular requirements for motor-starting relays
IEC 60738-1, Thermistors – Directly heated positive temperature coefficient – Part 1: Generic
specification
IEC 60799, Electrical accessories – Cord sets and interconnection cord sets
IEC 60906-1, IEC system of plugs and socket-outlets for household and similar purposes –
Part 1: Plugs and socket-outlets 16 A 250 V a.c.
IEC 60934, Circuit-breakers for equipment (CBE)
IEC 60990:2016, Methods of measurement of touch current and protective conductor current
IEC 60999-1:1999, Connecting devices – Electrical copper conductors – Safety requirements
for screw-type and screwless-type clamping units – Part 1: General requirements and particular
2 2
requirements for clamping units for conductors from 0,2 mm up to 35 mm (included)
IEC 61000-4-2, Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement
techniques – Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement
techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4, Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement
techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement
techniques – Surge immunity test
IEC 61000-4-6, Electromagnetic compatibility (EMC) – Part 4-6: Testing and measurement
techniques – Immunity to conducted disturbances, induced by radio-frequency fields
___________
There exists a consolidated edition 5.1:2015 that includes editi
...
IEC 60335-2-31 ®
Edition 6.0 2024-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-31: Particular requirements for range hoods and other cooking fume
extractors
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-31: Exigences particulières pour les hottes de cuisine et autres
extracteurs de fumées de cuisson
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IEC 60335-2-31 ®
Edition 6.0 2024-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-31: Particular requirements for range hoods and other cooking fume
extractors
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-31: Exigences particulières pour les hottes de cuisine et autres
extracteurs de fumées de cuisson
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120, 97.040.20 ISBN 978-2-8322-8243-4
– 2 – IEC 60335-2-31:2024 © 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 . 10
7 Marking and instructions . 10
8 Protection against access to live parts . 12
9 Starting of motor-operated appliances . 13
10 Power input and current . 13
11 Heating . 13
12 Charging of metal-ion batteries . 15
13 Leakage current and electric strength at operating temperature . 15
14 Transient overvoltages . 15
15 Moisture resistance . 15
16 Leakage current and electric strength . 16
17 Overload protection of transformers and associated circuits . 16
18 Endurance . 16
19 Abnormal operation . 16
20 Stability and mechanical hazards . 16
21 Mechanical strength . 17
22 Construction . 17
23 Internal wiring . 19
24 Components . 19
25 Supply connection and external flexible cords . 19
26 Terminals for external conductors . 19
27 Provision for earthing . 19
28 Screws and connections . 19
29 Clearances, creepage distances and solid insulation . 19
30 Resistance to heat and fire . 19
31 Resistance to rusting . 20
32 Radiation, toxicity and similar hazards . 20
Annexes . 23
Bibliography . 24
Figure 101 – "Replace any cracked protective shield" pictogram . 20
Figure 102 – Hob layout for the heating test . 21
Figure 103 – Probe for measuring surface temperatures . 22
Table 101 – Maximum temperature rises for specified external accessible surfaces
under normal operating conditions . 15
– 4 – IEC 60335-2-31:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-31: Particular requirements for range hoods
and other cooking fume extractors
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
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
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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
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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)
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shall not be held responsible for identifying any or all such patent rights.
IEC 60335-2-31 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 2012, Amendment 1:2016
and Amendment 2:2018. 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, 22.8, 22.101, 22.102);
c) update of the installation requirements for the heating test to include down-draft systems
(11.2);
d) addition of accessible surface temperature limits (11.3, 11.8);
e) introduction of IEC TR 62854 to determine compliance in case of doubt (22.14);
f) clarification of remote operation requirements for range hoods and other cooking fume
extraction appliances (22.40, 22.49, 22.51);
g) clarification of 30.101 with respect to grease filters and odour extraction filters.
The text of this International Standard is based on the following documents:
Draft Report on voting
61/7090/FDIS 61/7105/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/standardsdev/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 range hoods and other
cooking fume extractors.
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 60335-2-31:2024 © 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.
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.
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 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 and generic standards 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 60335-2-31:2024 © IEC 2024
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-31: Particular requirements for range hoods
and other cooking fume extractors
1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 deals with the safety of electric range hoods and other cooking fume
extractors intended for installing above, beside, behind or under household cooking ranges,
hobs and similar cooking appliances, their rated voltage being not more than 250 V including
direct current (DC) supplied appliances.
NOTE 101 The cooking appliance can be supplied by electricity or other fuels, such as gas.
Appliances not intended for normal household use but that nevertheless can be a source of
danger to the public, such as appliances intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by appliances
that are encountered by all persons in and around the home. However, in general, it does not
take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
Attention is drawn to the fact that
– for appliances incorporating electrostatic air filters, IEC 60335-2-65 also applies;
– for appliances intended to be used in vehicles or on board ships or 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, the national authorities
responsible for buildings and similar authorities.
This standard does not apply to
– appliances intended for commercial purposes (IEC 60335-2-99);
– appliances intended to be used in locations where special conditions prevail, such as the
presence of a corrosive or explosive atmosphere (dust, vapour or gas).
2 Normative references
This clause of Part 1 applies except as follows:
Addition:
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
IEC 61231, International lamp coding system (ILCOS)
IEC TR 62854:2014, Sharp edge testing apparatus and test procedure for lighting equipment −
Tests for sharpness of edge
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.5 Definitions relating to types of appliances
3.5.101
range hood
motor-operated appliance intended to collect contaminated air from above a hob
Note 1 to entry: The filtered air may be discharged back into the room or ducted away.
3.5.102
down-draft system
ventilation system intended for installation adjacent to household cooking ranges, hobs and
similar cooking appliances that draws contaminated air down into an internal exhaust duct
Note 1 to entry: The filtered air may be discharged back into the room or ducted away.
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.
5.7 Addition:
For down-draft systems, the tests specified in Clauses 11 and 13 are carried out at an ambient
temperature of 40 °C ± 2 °C.
5.10 Addition:
Appliances are not connected to a duct.
5.101 Down-draft systems intended to be installed close to a cooking surface are tested as
specified for range hoods.
– 10 – IEC 60335-2-31:2024 © IEC 2024
6 Classification
This clause of Part 1 is applicable.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances shall be marked on or near the lampholder with the maximum power input of
replaceable lamps as follows:
lamp max …. W
The word "lamp" may be replaced by symbol IEC 60417-5012 (2002-10).
If the voltage rating of the lamp is less than the rated voltage of the appliance, the voltage
rating of the lamp shall also be marked on or near the lampholder.
Range hoods intended to be used with self-shielded tungsten halogen lamps or metal halide
lamps only shall be marked with symbol IEC 60417-6030 (2009-11) or with the substance of the
following:
Use only with self-shielded tungsten halogen lamps or self-shielded metal halide lamps.
Range hoods incorporating a protective shield required in 22.104 shall be marked with the
pictogram of Figure 101 or with the substance of the following:
Replace any cracked protective shield
7.6 Addition:
[symbol IEC 60417-6030 use only with self-shielded
(2009-11)] lamp
IEC
7.12 Addition:
The instructions shall state the substance of the following:
– there shall be adequate ventilation of the room when the range hood is used at the same
time as appliances burning gas or other fuels (not applicable to appliances that only
discharge the air back into the room);
– the details concerning the method and frequency of cleaning;
– there is a fire risk if cleaning is not carried out in accordance with the instructions;
– do not flambé under the range hood;
– CAUTION: Accessible parts may become hot when used with cooking appliances.
The instructions shall state the substance of the following:
– lamp type, shape description and image;
– rated wattage of the intended lamp;
– max wattage of a potential replacement lamp;
– rated voltage or voltage range of lamp or, for pre-heat starting fluorescent lamps starter
replacement details;
– the type of lamp cap;
– nominal dimension(s) of lamp.
An ILCOS D code (standard version code specified in IEC 61231) including both the letter and
figure sections is considered to provide the required instructions.
NOTE 101 Some examples of the required marking using the ILCOS D code are as follows:
Example 1 (for tungsten filament lamps – incandescent lamps):
Use type lamp (or use in alternative type lamp) IAA/C-40-220/240-E27-60 (ILCOS D code in according to standard
IEC 61231).
– Tungsten filament lamp – clear pear-shaped lamp
– Max wattage: 40 W
– Voltage range: 220 V – 240 V
– Dimensions: Nominal diameter 60 mm.
Example 2 (for fluorescent lamps):
Use type lamp (or use in alternative type lamp) FBRI-23-230/240-E14-82/127 (ILCOS D code in according to standard
IEC 61231).
– Self-ballasted fluorescent reflector lamp – Integral induction type ballast
– Max wattage: 23 W
– Voltage range: 230 V – 240 V
– Dimensions: diameter 82 mm/length 127 mm.
If symbol IEC 60417-6030 (2009-11) or the pictogram of Figure 101 is used, its meaning shall
be explained.
7.12.1 Addition:
The installation instructions shall include the substance of the following:
– the air must not be discharged into a flue that is used for exhausting fumes from appliances
burning gas or other fuels (not applicable to appliances that only discharge the air back into
the room);
– the minimum distance between the supporting surface for the cooking vessels on the hob
and the lowest part of the range hood. (When the range hood is located above a gas
appliance, this distance shall be at least 65 cm. If the instructions for installation for the gas
hob specify a greater distance, this has to be taken into account. The distance of 65 cm can
be reduced for
• non-combustible parts of range hoods, or
• parts operating at safety extra low voltage,
provided these parts do not give access to live parts if deformed);
– regulations concerning the discharge of air have to be fulfilled.
If the range hood is only intended to be installed over a hob with no more than four hob
elements, this shall be stated.
– 12 – IEC 60335-2-31:2024 © IEC 2024
The installation instructions for range hoods with accessible metallic enclosures of class II
construction shall include details that indicate the location and maximum permitted lengths for
any fixing or mounting screw or other fixing device that penetrates into the range hood to attach
an accessory such as a facia or duct fitting.
Where fixing or mounting screws or other fixing devices are used, that penetrate into the range
hood with an accessible metallic enclosure of class II construction, to attach an accessory,
the instructions shall indicate the required location of these screws or fixing devices and include
the substance of the following warning.
Warning: Failure to install the screws or fixing device in accordance with these instructions
may result in electrical hazards
The warning shall be in the same part of the instructions that include details of how to mount
the equipment.
The installation instructions for down-draft systems shall also include the following:
– for down-draft systems not intended to be used with gas hobs, the substance of the
following warning:
CAUTION: This appliance is not intended to be used with gas hobs.
– for down-draft systems intended to be used together with gas hobs, details of the gas
appliance.
NOTE 101 This information can only be given if the down-draft system has been tested in conjunction with
the designated appliance.
7.14 Addition:
The height of symbol IEC 60417-6030 (2009-11) and the pictogram of Figure 101 shall be at
least 15 mm.
7.15 Addition:
The marking for maximum power input of a replaceable lamp shall be visible during replacement
of the lamp.
Symbol IEC 60417-6030 (2009-11) or the marking "Use only with self-shielded tungsten
halogen lamps or self-shielded metal halide lamps" shall be visible during replacement of the
lamp. The pictogram of Figure 101 or the marking "Replace any cracked protective shield" shall
be visible when the appliance is installed as in normal use.
8 Protection against access to live parts
This clause of Part 1 is applicable except as follows.
8.1.1 Addition:
Test probe 18 is not applicable to parts that according to the instructions are intended to be
installed more than 1,8 m above the floor.
8.2 Addition:
After the removal of detachable parts during user maintenance, the basic insulation of
internal wiring may be touched provided it is electrically equivalent to the insulation of cords
complying with IEC 60227 or IEC 60245.
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 Replacement:
Built-in appliances are installed in accordance with the instructions. Other appliances are fixed
to a vertical support.
The appliance is located above a hob so that the distance between its lowest point and the hob
surface is the minimum distance specified in the instructions. For down-draft systems, the
appliance is located at the minimum distance to the cooking surface specified in the instructions.
A vertical side wall extending to the top of the range hood is placed at right angles to the
vertical support, 100 mm from one side of the range hood. Dull black-painted plywood
approximately 20 mm thick is used for the vertical support, the side wall and for the installation
of built-in range appliances.
If the range hood or down-draft system is intended to be used with a hob having four hob
elements, the hob shall have two 2 kW electric elements at the back and two 1,5 kW electric
elements at the front.
If the range hood or down-draft system is intended to be used with a hob having six hob
elements, the hob shall have three 2 kW electric elements at the back and three 1,5 kW electric
elements at the front.
The layout of the hobs used in the tests is shown in Figure 102. The hobs are centrally situated
with respect to the range hood.
Vessels, without lids, containing water are placed on the hob elements. The diameter of the
vessels is approximately equal to that of the hob elements. The hob elements are operated to
maintain vigorous boiling.
The appliance is also tested without the hob elements in operation.
For appliances delivered for installation with the control and filter boxes separate from the fan,
the duct length on input and output shall be 4 times fan diameter. However, if the fan is intended
to be mounted on the external structure of a building, the fan is not ducted on the output side.
– 14 – IEC 60335-2-31:2024 © IEC 2024
11.3 Addition:
Where the external accessible surfaces are suitably flat and access permits, then the test
probe of Figure 103 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.
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:
The temperature rise limit for external enclosures, external accessible surfaces and wood
does not apply when the hob elements are in operation. When the appliance is tested without
the hob elements in operation, only the temperature rises of the external enclosures, external
accessible surfaces and wood are measured, the temperature rise limit for wood being 65 K.
Temperature rises of lampholders and the enclosure are also determined with the fan motor
switched off and lights switched on. Enclosure temperatures are not measured within a distance
of 35 mm around the lamp glass regardless of its shape.
For down-draft systems, the temperature rises shall not exceed the values given in Table 3
reduced by 15 K.
The temperature rise of handles or grips of vents and air shutters shall not exceed the value
specified in Table 3 for surfaces of handles, knobs, grips and similar parts which are held for
short periods only in normal use.
Table 101 – Maximum temperature rises for specified external
accessible surfaces under normal operating conditions
a, b
Surface
Temperature rise of external accessible surfaces
K
Bare metal 42
c
Coated metal
Glass and ceramic 56
d, e
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
Within 25 mm from air outlets, the above limits are increased by 5 K.
b
Temperature rise on surfaces that are inaccessible to a 75 mm diameter probe having a hemispherical end.
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 coated metal
for underlying metal apply or the temperature rise limits for glass or ceramic material for underlying glass or
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.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.1.1 Addition:
The outer part of fans intended to be installed in the external structure of a building is subjected
to the test of IEC 60529:1989, 14.2.4 a), the part of the fan not mounted on the outside surface
being protected against spray from the oscillating tube. The test is carried out with the appliance
in the rest position and then in operation while supplied at rated voltage, shutters or similar
devices being in the open position.
15.2 Addition:
A vessel with 0,5 l of the spillage solution is poured steadily over a period of 15 s over critical
parts of a down-draft system.
– 16 – IEC 60335-2-31:2024 © IEC 2024
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 Addition:
Appliances are also subjected to the test of 19.101.
19.13 Addition:
During the test of 19.101, the temperature of the motor windings shall not exceed the values
specified in Table 8. The appliance shall not deform to such an extent that parts fall from it.
19.101 Appliances are operated above a hob as specified in Clause 11, but without vessels
and with only the two outer hob elements at the back being energized.
20 Stability and mechanical hazards
This clause of Part 1 is applicable except as follows.
20.2 Addition:
Filters are considered to be detachable parts and shall be removed unless a tool is required
for removal.
Test probe 18 is not applicable to parts that according to the instructions are intended to be
installed more than 1,8 m above the floor.
20.101 If a part of a range hood or down-draft system can be moved automatically, there
shall be no risk of entrapment or injury.
Compliance is checked by the following test.
The appliance is operated at rated voltage and is operated to open and close the driven part.
The driven part shall
a) decelerate to a speed lower than 15 mm/s in the last 50 mm of the movement, as it
approaches any position in which entrapment can occur; or
b) when IEC 61032 probe 32 is placed at any potential entrapment point across the width and
height of the opening:
– stop and reverse direction before contacting the probe; or
– if the probe is touched by the driven part:
• not exert a force on the probe exceeding a value of 100 N; or
• not subject the probe to a shear force.
If compliance relies on the operation of an electronic circuit, the test is repeated under the
following conditions applied separately:
– the fault conditions in a) to g) of 19.11.2, are applied one at a time to the electronic circuit;
– the electromagnetic phenomena tests of 19.11.4.2 and 19.11.4.5 are applied in turn to the
appliance. The tests are carried out with surge protective devices disconnected, unless they
incorporate spark gaps.
The driven part shall
a) decelerate to a speed lower than 15 mm/s in the last 50 mm of the movement, as it
approaches any position in which entrapment can occur; or
b) when IEC 61032 probe 32 is placed at any potential entrapment point across the width and
height of the opening:
– stop and reverse direction before contacting the probe; or
– if the probe is touched by the driven part:
• not exert a force on the probe exceeding a value of 100 N; or
• not subject the probe to a shear force.
21 Mechanical strength
This clause of Part 1 is applicable.
22 Construction
This clause of Part 1 is applicable except as follows.
22.8 Replacement:
For appliances having compartments to which access is gained during user maintenance, the
electrical connections, other than those of interconnection cords intended to be disconnected
before cleaning or user maintenance, shall be arranged so that they are not subjected to
pulling during cleaning or other user maintenance.
Compliance is checked by inspection and by the following test.
Detachable parts are removed. It shall not be possible to grasp wiring that can be touched in
such a way that the connections are subjected to undue stress.
In case of doubt, the wiring is subjected to a pull of 10 N, applied without jerks three times in
succession, in the most unfavourable direction that can occur during user maintenance. There
shall be no appreciable displacement of the connections.
22.14 Modification:
Replace the last paragraph with the following:
Compliance is checked by inspection and, in case of doubt, by the test described in
IEC TR 62854:2014, Clause 2 and Clause 5.
– 18 – IEC 60335-2-31:2024 © IEC 2024
22.40 Addition:
Range hoods and other cooking fume extractors are considered to be appliances that can
operate continuously, automatically or remotely without giving rise to a hazard.
22.49 Not applicable.
22.51 Not applicable.
22.101 Appliances shall be constructed so that they can be fixed securely to a wall or other
support. Brackets and similar means shall be of
...
Frequently Asked Questions
IEC 60335-2-31:2024 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Household and similar electrical appliances - Safety - Part 2-31: Particular requirements for range hoods and other cooking fume extractors". This standard covers: IEC 60335-2-31:2024 deals with the safety of electric range hoods and other cooking fume extractors intended for installing above, beside, behind or under household cooking ranges, hobs and similar cooking appliances, their rated voltage being not more than 250 V including direct current (DC) supplied appliances. The cooking appliance can be supplied by electricity or other fuels, such as gas. Appliances not intended for normal household use but that nevertheless can be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard. As far as is practicable, this standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home. However, in general, it does not take into account - persons (including children) whose physical, sensory or mental capabilities; or lack of experience and knowledge prevents them from using the appliance safely without supervision or instruction; - children playing with the appliance. Attention is drawn to the fact that - for appliances incorporating electrostatic air filters, IEC 60335-2-65 also applies; - for appliances intended to be used in vehicles or on board ships or 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, the national authorities responsible for buildings and similar authorities. This standard does not apply to - appliances intended for commercial purposes (IEC 60335-2-99); - appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas). This sixth edition cancels and replaces the fifth edition published in 2012, Amendment 1:2016 and Amendment 2:2018. 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, 22.8, 22.101, 22.102); c) update of the installation requirements for the heating test to include down-draft systems (11.2); d) addition of accessible surface temperature limits (11.3, 11.8); e) introduction of IEC TR 62854 to determine compliance in case of doubt (22.14); f) clarification of remote operation requirements for range hoods and other cooking fume extraction appliances (22.40, 22.49, 22.51); g) clarification of 30.101 with respect to grease filters and odour extraction filters. 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.
IEC 60335-2-31:2024 deals with the safety of electric range hoods and other cooking fume extractors intended for installing above, beside, behind or under household cooking ranges, hobs and similar cooking appliances, their rated voltage being not more than 250 V including direct current (DC) supplied appliances. The cooking appliance can be supplied by electricity or other fuels, such as gas. Appliances not intended for normal household use but that nevertheless can be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard. As far as is practicable, this standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home. However, in general, it does not take into account - persons (including children) whose physical, sensory or mental capabilities; or lack of experience and knowledge prevents them from using the appliance safely without supervision or instruction; - children playing with the appliance. Attention is drawn to the fact that - for appliances incorporating electrostatic air filters, IEC 60335-2-65 also applies; - for appliances intended to be used in vehicles or on board ships or 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, the national authorities responsible for buildings and similar authorities. This standard does not apply to - appliances intended for commercial purposes (IEC 60335-2-99); - appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas). This sixth edition cancels and replaces the fifth edition published in 2012, Amendment 1:2016 and Amendment 2:2018. 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, 22.8, 22.101, 22.102); c) update of the installation requirements for the heating test to include down-draft systems (11.2); d) addition of accessible surface temperature limits (11.3, 11.8); e) introduction of IEC TR 62854 to determine compliance in case of doubt (22.14); f) clarification of remote operation requirements for range hoods and other cooking fume extraction appliances (22.40, 22.49, 22.51); g) clarification of 30.101 with respect to grease filters and odour extraction filters. 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.
IEC 60335-2-31:2024 is classified under the following ICS (International Classification for Standards) categories: 13.120 - Domestic safety; 97.040.20 - Cooking ranges, working tables, ovens and similar appliances. The ICS classification helps identify the subject area and facilitates finding related standards.
IEC 60335-2-31:2024 has the following relationships with other standards: It is inter standard links to IEC 60335-2-31:2012, IEC 60335-2-31:2012/AMD2:2018, IEC 60335-2-31:2012/AMD1:2016. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase IEC 60335-2-31:2024 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of IEC standards.
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