IEC 60335-2-31:2012

IEC 60335-2-31 ®
Edition 5.2 2018-08
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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: Règles particulières pour les hottes de cuisine et autres extracteurs
de fumées de cuisson
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IEC 60335-2-31 ®
Edition 5.2 2018-08
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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: Règles 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 978-2-8322-5985-6

IEC 60335-2-31 ®
Edition 5.2 2018-08
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
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: Règles particulières pour les hottes de cuisine et autres extracteurs
de fumées de cuisson
– 2 – IEC 60335-2-31:2012+AMD1:2016

+AMD2:2018 CSV © IEC 2018
CONTENTS
FOREWORD . 3

INTRODUCTION . 6

1 Scope . 7

2 Normative references . 7

3 Terms and definitions . 8

4 General requirement . 8

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

28 Screws and connections . 16
29 Clearances, creepage distances and solid insulation . 16
30 Resistance to heat and fire . 16
31 Resistance to rusting . 17
32 Radiation, toxicity and similar hazards . 17
Annexes . 19
Bibliography . 20

Figure 101 – Hob layout for the heating test . 18

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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
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
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Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendments has been prepared
for user convenience.
IEC 60335-2-31 edition 5.2 contains the fifth edition (2012-11) [documents 61/4453/FDIS and
61/4506/RVD], its amendment 1 (2016-04) [documents 61/5110/FDIS and 61/5140/RVD] and its
amendment 2 (2018-08) [documents 61/5565/CDV and 61/5647A/RVC].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendments 1 and 2. Additions are in green text, deletions are in
strikethrough red text. A separate Final version with all changes accepted is available in this
publication.
– 4 – IEC 60335-2-31:2012+AMD1:2016

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This part of International Standard IEC 60335 has been prepared by IEC technical committee

61: Safety of household and similar electrical appliances.

The principal changes in this edition as compared with the fourth edition of IEC 60335-2-31

are as follows (minor changes are not listed):

• added requirements to address range hood installation (7.12.1 and 22.103);

• added construction requirement to address risk of entrapment in rangehoods or down-draft

system (20.101);
• deleted reference to ISO 13732-1 from Bibliography.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fifth edition (2010) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for 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.
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the stability date indicated on the IEC web site under

"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.
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.

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The following differences exist in the countries indicated below.

– 7.12: Warnings are required to be marked on the range hood (USA).

– 7.12.1: Additional requirements are specified for range hoods intended to be placed

above gas hobs (Sweden).
– 8.2: The insulation of internal wiring need not be equivalent to IEC 60227 or IEC 60245

(USA).
– 11.2: The test method is different (USA).

– 19.101: The test method is different (USA).

– 20.2: The addition applies only to disposable filters (USA).

– 22.101: Additional fixing means are not required if screws can be tightened in keyhole
slots (USA).
– 22.102: Parts located behind a filter are considered to be parts that have to be cleaned
(Sweden).
– 30.101: The method of evaluating filters is different (USA).

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.
– 6 – IEC 60335-2-31:2012+AMD1:2016

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INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its

provisions is entrusted to appropriately qualified and experienced persons.

This standard recognizes the internationally accepted level of protection against hazards such

as electrical, mechanical, thermal, fire and radiation of appliances when operated as in

normal use taking into account the manufacturer's instructions. It also covers abnormal

situations that can be expected in practice and takes into account the way in which

electromagnetic phenomena can affect the safe operation of appliances.

This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
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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 International Standard 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.
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 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 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 is applicable applies except as follows:
Addition:
IEC 61231, International lamp coding system (ILCOS)

– 8 – IEC 60335-2-31:2012+AMD1:2016

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3 Terms and definitions
This clause of Part 1 is applicable except as follows.

3.101
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.

3.102
down-draft system
a 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:
Unless otherwise stated, appliances are not connected to a duct.
5.101 Down-draft systems intended to be installed above the cooking surface are tested as
specified for range hoods.
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).

+AMD2:2018 CSV © IEC 2018
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” 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 shall be marked with symbol “Replace any

cracked shield” or with the substance of the following:

Replace any cracked protective shield
7.6 Addition:
Use only with self-shielded tungsten
halogen lamps or self-shielded metal
halide lamps
IEC
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):

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Use type lamp (or use in alternative type lamp) IAA/C-40-220/230-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 or self-shielded metal halide
lamps” or symbol “Replace any cracked shield” 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, and 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.
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:
+AMD2:2018 CSV © IEC 2018
– 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).
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” 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 “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” 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.
8.2 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. A vertical side wall

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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 is intended to be installed over 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 is intended to be installed over 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. 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.
11.7 Replacement:
Appliances are operated until steady conditions are established.
11.8 Addition:
The temperature rise limit for external enclosures 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 enclosure 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.
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable.
14 Transient overvoltages
This clause of Part 1 is applicable.

+AMD2:2018 CSV © IEC 2018
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 Subclause 14.2.4 a) of IEC 60529, 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 is poured steadily over a period
of 15 s over critical parts of a down-draft system.
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.

– 14 – IEC 60335-2-31:2012+AMD1:2016

+AMD2:2018 CSV © IEC 2018
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 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 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 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 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.

+AMD2:2018 CSV © IEC 2018
Detachable parts are removed. It shall not be possible to grasp wiring likely to 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 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.
22.101 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.
22.102 Appliances shall be constructed so that parts liable to accumulate deposits of grease
can be cleaned without moving adjacent cooking appliances.
Compliance is checked by inspection.
NOTE Parts located behind a filter are not considered to be parts that have to be cleaned.
22.103 Where fixing or mounting screws or other fixing devices that penetrate into the range
hood with an accessible metallic enclosure of class II construction are used to attach an
accessory to the range hood, there shall be
– pre-formed holes in the range hood enclosure and accessory if it is supplied by the range
hood manufacturer, or
– markings on the range hood enclosure and accessory if it is supplied by the range hood
manufacturer to indicate the correct location for the screws or fixing devices.
Where markings are used, the markings shall be clearly visible and legible during installation.
Where the fixing or mounting screw or other fixing device penetrates into the range hood
enclosure in areas where live parts are present, there shall be no hazard due to screws or
fixing devices piercing the wiring or insulation of live parts or making contact with live parts
inside the range hood.
Live parts not separated from the fixing or mounting screw or other fixing device by an
earthed metal barrier shall not be in an area behind the screw or other fixing device location
within the envelope of a cylinder having a diameter of 10 mm and a length of 50 mm.
Compliance is checked by inspection and the following test, if applicable.
Directly behind the entry point into the range hood enclosure of any fixing or mounting screw,
or other fixing device, an area encompassed by a 10 mm diameter cylinder of 50 mm length is
determined. The axis of the cylinder being aligned with the axis of the entry point that is
normal to the surface of the range hood enclosure. There shall be no live parts within the
envelope of the cylinder.
Additionally, live parts that may encroach on the envelope of the cylinder shall have a force
of 5 N applied in the directi
...

IEC 60335-2-31 ®
Edition 5.1 2016-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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: Règles particulières pour les hottes de cuisine et autres extracteurs
de fumées de cuisson
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IEC 60335-2-31 ®
Edition 5.1 2016-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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: Règles 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 978-2-8322-3333-7

IEC 60335-2-31 ®
Edition 5.1 2016-04
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
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: Règles particulières pour les hottes de cuisine et autres extracteurs
de fumées de cuisson
– 2 – IEC 60335-2-31:2012+AMD1:2016 CSV

© IEC 2016
CONTENTS
FOREWORD . 3

INTRODUCTION . 6

1 Scope . 7

2 Normative references . 7

3 Terms and definitions . 8

4 General requirement . 8

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

28 Screws and connections . 16
29 Clearances, creepage distances and solid insulation . 16
30 Resistance to heat and fire . 16
31 Resistance to rusting . 17
32 Radiation, toxicity and similar hazards . 17
Annexes . 19
Bibliography . 20

Figure 101 – Hob layout for the heating test . 18

© IEC 2016
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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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been prepared
for user convenience.
IEC 60335-2-31 edition 5.1 contains the fifth edition (2012-11) [documents 61/4453/FDIS and
61/4506/RVD] and its amendment 1 (2016-04) [documents 61/5110/FDIS and 61/5140/RVD].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions are in green text, deletions are in strikethrough red text.
A separate Final version with all changes accepted is available in this publication.

– 4 – IEC 60335-2-31:2012+AMD1:2016 CSV

© IEC 2016
This part of International Standard IEC 60335 has been prepared by IEC technical committee

61: Safety of household and similar electrical appliances.

The principal changes in this edition as compared with the fourth edition of IEC 60335-2-31

are as follows (minor changes are not listed):

• added requirements to address range hood installation (7.12.1 and 22.103);

• added construction requirement to address risk of entrapment in rangehoods or down-draft

system (20.101);
• deleted reference to ISO 13732-1 from Bibliography.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fifth edition (2010) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for 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.
The committee has decided that the contents of the base publication and its amendment will
remain unchanged until the stability date indicated on the IEC web site under

"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.
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.

© IEC 2016
The following differences exist in the countries indicated below.

– 7.12: Warnings are required to be marked on the range hood (USA).

– 7.12.1: Additional requirements are specified for range hoods intended to be placed

above gas hobs (Sweden).
– 8.2: The insulation of internal wiring need not be equivalent to IEC 60227 or IEC 60245

(USA).
– 11.2: The test method is different (USA).

– 19.101: The test method is different (USA).

– 20.2: The addition applies only to disposable filters (USA).

– 22.101: Additional fixing means are not required if screws can be tightened in keyhole
slots (USA).
– 22.102: Parts located behind a filter are considered to be parts that have to be cleaned
(Sweden).
– 30.101: The method of evaluating filters is different (USA).

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.
– 6 – IEC 60335-2-31:2012+AMD1:2016 CSV

© IEC 2016
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its

provisions is entrusted to appropriately qualified and experienced persons.

This standard recognizes the internationally accepted level of protection against hazards such

as electrical, mechanical, thermal, fire and radiation of appliances when operated as in

normal use taking into account the manufacturer's instructions. It also covers abnormal

situations that can be expected in practice and takes into account the way in which

electromagnetic phenomena can affect the safe operation of appliances.

This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
© IEC 2016
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 International Standard 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.
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 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 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 is applicable applies except as follows:
Addition:
IEC 61231, International lamp coding system (ILCOS)

– 8 – IEC 60335-2-31:2012+AMD1:2016 CSV

© IEC 2016
3 Terms and definitions
This clause of Part 1 is applicable except as follows.

3.101
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.

3.102
down-draft system
a 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:
Unless otherwise stated, appliances are not connected to a duct.
5.101 Down-draft systems intended to be installed above the cooking surface are tested as
specified for range hoods.
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).

© IEC 2016
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” 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 shall be marked with symbol “Replace any

cracked shield” or with the substance of the following:

Replace any cracked protective shield
7.6 Addition:
Use only with self-shielded tungsten
halogen lamps or self-shielded metal
halide lamps
IEC
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):

– 10 – IEC 60335-2-31:2012+AMD1:2016 CSV

© IEC 2016
Use type lamp (or use in alternative type lamp) IAA/C-40-220/230-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 or self-shielded metal halide
lamps” or symbol “Replace any cracked shield” 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, and 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.
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:
© IEC 2016
– 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).
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” 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 “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” 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.
8.2 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. A vertical side wall

– 12 – IEC 60335-2-31:2012+AMD1:2016 CSV

© IEC 2016
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 is intended to be installed over 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 is intended to be installed over 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. 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.
11.7 Replacement:
Appliances are operated until steady conditions are established.
11.8 Addition:
The temperature rise limit for external enclosures 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 enclosure 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.
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable.
14 Transient overvoltages
This clause of Part 1 is applicable.

© IEC 2016
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 Subclause 14.2.4 a) of IEC 60529, 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 is poured steadily over a period
of 15 s over critical parts of a down-draft system.
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.

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© IEC 2016
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 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 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 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 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.

© IEC 2016
Detachable parts are removed. It shall not be possible to grasp wiring likely to 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 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.
22.101 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.
22.102 Appliances shall be constructed so that parts liable to accumulate deposits of grease
can be cleaned without moving adjacent cooking appliances.
Compliance is checked by inspection.
NOTE Parts located behind a filter are not considered to be parts that have to be cleaned.
22.103 Where fixing or mounting screws or other fixing devices that penetrate into the range
hood with an accessible metallic enclosure of class II construction are used to attach an
accessory to the range hood, there shall be
– pre-formed holes in the range hood enclosure and accessory if it is supplied by the range
hood manufacturer, or
– markings on the range hood enclosure and accessory if it is supplied by the range hood
manufacturer to indicate the correct location for the screws or fixing devices.
Where markings are used, the markings shall be clearly visible and legible during installation.
Where the fixing or mounting screw or other fixing device penetrates into the range hood
enclosure in areas where live parts are present, there shall be no hazard due to screws or
fixing devices piercing the wiring or insulation of live parts or making contact with live parts
inside the range hood.
Live parts not separated from the fixing or mounting screw or other fixing device by an
earthed metal barrier shall not be in an area behind the screw or other fixing device location
within the envelope of a cylinder having a diameter of 10 mm and a length of 50 mm.
Compliance is checked by inspection and the following test, if applicable.
Directly behind the entry point into the range hood enclosure of any fixing or mounting screw,
or other fixing device, an area encompassed by a 10 mm diameter cylinder of 50 mm length is
determined. The axis of the cylinder being aligned with the axis of the entry point that is
normal to the surface of the range hood enclosure. There shall be no live parts within the
envelope of the cylinder.
Additionally, live parts that may encroach on the envelope of the cylinder shall have a force
of 5 N applied in the direction towards the cylinder. The live parts shall not enter the
envelope of the cylinder.
– 16 – IEC 60335-2-31:2012+AMD1:2016 CSV

© IEC 2016
22.104 Range hoods intended to incorporate tungsten
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