FprEN IEC 60335-2-17:2025

SLOVENSKI STANDARD
01-julij-2024
Gospodinjski in podobni električni aparati - Varnost - 2-17. del: Posebne zahteve
za grelne odeje, blazine, pregrinjala in podobne upogljive grelne naprave
Household and similar electrical appliances - Safety - Part 2-17: Particular requirements
for blankets, pads, clothing and similar flexible heating appliances
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-17:
Besondere Anforderungen an Wärmezudecken, Wärmeunterbetten, Heizkissen,
Kleidung und ähnliche schmiegsame Wärmegeräte
Appareils électrodomestiques et analogues - Sécurité - Partie 2-17: Exigences
particulières pour les couvertures, coussins, vêtements et appareils chauffants souples
analogues
Ta slovenski standard je istoveten z: prEN IEC 60335-2-17:2024
ICS:
13.120 Varnost na domu Domestic safety
97.030 Električni aparati za dom na Domestic electrical
splošno appliances in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD DRAFT
prEN IEC 60335-2-17
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2024
ICS 13.120; 97.040.50 Will supersede EN 60335-2-17:2013; EN 60335-2-
17:2013/A11:2019; EN 60335-2-17:2013/A1:2020; EN
60335-2-17:2013/A2:2021
English Version
Household and similar electrical appliances - Safety - Part 2-17:
Particular requirements for blankets, pads, clothing and similar
flexible heating appliances
(IEC 60335-2-17:2022)
Appareils électrodomestiques et analogues - Sécurité - Sicherheit elektrischer Geräte für den Hausgebrauch und
Partie 2-17: Exigences particulières pour les couvertures, ähnliche Zwecke - Teil 2-17: Besondere Anforderungen an
coussins, vêtements et appareils chauffants souples
Wärmezudecken, Wärmeunterbetten, Heizkissen, Kleidung
analogues und ähnliche schmiegsame Wärmegeräte
(IEC 60335-2-17:2022) (IEC 60335-2-17:2022)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2024-08-16.

The text of this draft consists of the text of IEC 60335-2-17:2022.

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 78885 Ref. No. prEN IEC 60335-2-17:2024 E

prEN IEC 60335-2-17:2024 (E)
1 European foreword
2 This document (prEN IEC 60335-2-17:2024) consists of the text of IEC 60335-2-17:2022 prepared by
3 IEC/TC 61 "Safety of household and similar electrical appliances".
4 This document is currently submitted to the Enquiry.
5 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
6 This document is read in conjunction with prEN IEC 60335-2-17:2024/prAA:2024.
7 This document will supersede EN 60335-2-17:2013 and all of its amendments and corrigenda (if any).
8 This document has been prepared under a standardization request addressed to CENELEC by the European
9 Commission. The Standing Committee of the EFTA State subsequently approves these requests for its
10 Member States.
11 For relationship with EU legislation, see informative Annexes ZZA and ZZC, which are an integral part of
12 prEN IEC 60335-2-17:2024/prAA:2024.
IEC 60335-2-17 ®
Edition 4.0 2022-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –

Part 2-17: Particular requirements for blankets, pads, clothing and similar

flexible heating appliances
Appareils électrodomestiques et analogues – Sécurité –

Partie 2-17: Exigences particulières pour les couvertures, coussins, vêtements

et appareils chauffants souples analogues

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120; 97.040.50 ISBN 978-2-8322-5771-5

– 2 – IEC 60335-2-17:2022 © IEC 2022
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 9
4 General requirement . 11
5 General conditions for the tests . 11
6 Classification . 13
7 Marking and instructions . 13
8 Protection against access to live parts . 16
9 Starting of motor-operated appliances . 16
10 Power input and current . 16
11 Heating . 17
12 Charging of metal-ion batteries . 19
13 Leakage current and electric strength at operating temperature . 19
14 Transient overvoltages . 20
15 Moisture resistance . 20
16 Leakage current and electric strength . 21
17 Overload protection of transformers and associated circuits . 22
18 Endurance . 22
19 Abnormal operation . 22
20 Stability and mechanical hazards . 25
21 Mechanical strength . 25
22 Construction . 33
23 Internal wiring . 34
24 Components . 35
25 Supply connection and external flexible cords . 35
26 Terminals for external conductors . 36
27 Provision for earthing . 36
28 Screws and connections . 36
29 Clearances, creepage distances and solid insulation . 36
30 Resistance to heat and fire . 37
31 Resistance to rusting . 39
32 Radiation, toxicity and similar hazards . 39
Annexes . 49
Annex A (informative) Routine tests . 50
Annex AA (normative) Specification for the thermal insulation . 52
Annex BB (normative) Equipment for the mechanical strength test for blankets . 53
Annex CC (normative) Clothing . 56
Annex DD (normative) Rigidity index test for mattresses . 59
Bibliography . 60

IEC 60335-2-17:2022 © IEC 2022 – 3 –
Figure 101 – Sign for "Do not insert pins" . 40
Figure 102 – Sign for “Not to be used by very young children (0-3 years)” . 40
Figure 103 – Sign for "Do not use folded or rucked" . 40
Figure 104 – Arrangement for measuring leakage current and electric strength of the
flexible part . 41
Figure 105 – Tumbling barrel for testing the mechanical strength of pads . 42
Figure 106 – Impact apparatus for testing enclosures of moisture-proof appliances . 43
Figure 107 – Shape of the sample for the tear resistance test . 44
Figure 108 – Equipment for flexing heating elements and internal wiring . 45
Figure 109 – Shape of the test piece for the tensile test . 45
Figure 110 – Apparatus for pressure test on connectors . 46
Figure 111 – Equipment for the spark ignition test . 47
Figure 112 – Equipment for the spark ignition test – Details of the mask . 48
Figure BB.1 – Equipment for the mechanical strength test of blankets . 54
Figure BB.2 – Detail of the drum and cylinders . 55
Figure BB.3 – Detail of the clamping bar . 55
Figure DD.1 – Mattress rigidity index test setup . 59

Table 101 – Maximum temperatures . 18
Table 102 – Maximum temperature rises . 18
Table 103 – Pulley diameter for heating elements with PTC characteristic in mattresses . 31
Table A.101 – Test voltages . 50

– 4 – IEC 60335-2-17:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-17: Particular requirements for blankets, pads,
clothing and similar flexible heating appliances

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) 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.
IEC 60335-2-17 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This fourth edition cancels and replaces the third edition published in 2012, Amendment 1:2015
and Amendment 2:2019. 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, 19.106, 21.103, 21.104, 21.110, 30.1,
30.102, Annex BB, CC.19.3);
c) clarification of the definition of control unit (3.6.105);
d) revision for adjusting the supply voltage of appliances, other than controlled appliances,
when operation at rated power input times a factor is specified (5.12);

IEC 60335-2-17:2022 © IEC 2022 – 5 –
e) clarification of testing of blankets that cannot be folded with five thicknesses (19.101);
f) updated compliance criteria to include breakage of electrodes (21.1);
g) clarification of the test method for mattresses based on the rigidity index of the flexible part
(21.111.1, Annex DD);
h) clarification for testing heating elements with a non-circular construction (21.111.3);
i) addition of requirements to protect the user from overheating in the event of an interruption
in the mains supply (22.111)
j) inclusion of pressure test method from IEC 60320-1:2001 (30.1);
k) update of test methods for resistance to fire tests (30.101.1, 30.102).
The text of this International Standard is based on the following documents:
Draft Report on voting
61/6671/FDIS 61/6747/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 blankets, pads, clothing and
similar flexible heating appliances.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies as
far as is reasonable. When this standard states "addition", "modification" or "replacement", the
relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.

– 6 – IEC 60335-2-17:2022 © IEC 2022
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,
• 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.
The following differences exist in the countries indicated below.
– 6.1: Class 0 products are allowed (Japan).

IEC 60335-2-17:2022 © IEC 2022 – 7 –
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal
use taking into account the manufacturer's instructions. It also covers abnormal situations that
can be expected in practice and takes into account the way in which electromagnetic
phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that there
is compatibility with the wiring rules when the appliance is connected to the supply mains.
However, national wiring rules can differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with in
Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal publications, basic safety publications and group safety publications covering a hazard are not
applicable since they have been taken into consideration when developing the general and particular requirements
for the IEC 60335 series of standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of the
requirements and, if found to be substantially equivalent, may be considered to comply with the
standard.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.

– 8 – IEC 60335-2-17:2022 © IEC 2022
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-17: Particular requirements for blankets, pads,
clothing and similar flexible heating appliances

1 Scope
This clause of Part 1 is replaced by the following.
This part of IEC 60335 deals with the safety of electric blankets, pads, clothing and other
flexible appliances that heat the bed or human body, for household and similar purposes, their
rated voltage being not more than 250 V including direct current (DC) supplied appliances and
battery-operated appliances.
This standard also applies to control units supplied with the appliance.
Appliances not intended for normal household use but which nevertheless possibly pose a
source of danger to the public, such as appliances intended to be used in beauty parlours or by
persons in cold ambient temperatures, are within the scope of this standard.
Requirements and tests for clothing are given in normative Annex CC.
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.
Children are considered to be old enough to use an appliance without supervision when they
have been adequately instructed by a parent or guardian and are deemed competent to use the
appliance safely.
Attention is drawn to the fact that
– 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 and similar authorities.
This standard does not apply to
– 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);
– rigid bed warmers, such as those of metal or ceramic material;
– water bed heaters (IEC 60335-2-66);
– heating appliances for breeding and rearing animals (IEC 60335-2-71);
– foot warmers and heating mats (IEC 60335-2-81);

IEC 60335-2-17:2022 © IEC 2022 – 9 –
– appliances specifically intended for use under medical supervision (IEC 60601-2-35);
– heated carpets (IEC 60335-2-106).
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
ISO/IEC Guide 37, Instructions for use of products by consumers
ISO 2439, Flexible cellular polymeric materials – Determination of hardness (indentation
technique)
ISO 3758, Textiles – Care labelling code using symbols
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.9 Addition:
operation of the appliance under the following conditions:
– blankets and pads are placed between sheets of thermal insulation;
– duvets are placed on a sheet of thermal insulation but not covered;
– mattresses are covered by a sheet of thermal insulation
Note 101 to entry: The specification for the thermal insulation is given in normative Annex AA
The flexible part is supported on a plywood base 20 mm thick and positioned not less than
300 mm above the floor. The size of the plywood base is such that the thermal insulation can
be fully supported over its entire area. The size of the sheets of thermal insulation is such that
the edges extend at least 100 mm beyond the outline of the heated area.
Control units held in the hand when they are actuated and cord switches are positioned to
hang away from the plywood base. Other control units are placed on a supporting surface
away from the plywood base.
3.5 Definitions relating to types of appliances
3.5.101
blanket
appliance comprising a substantially flat flexible part that is intended to form part of the
bedding, for heating the bed
3.5.102
underblanket
blanket intended to be used under the occupant of the bed
3.5.103
overblanket
blanket intended to be used over the occupant of the bed

– 10 – IEC 60335-2-17:2022 © IEC 2022
3.5.104
duvet
quilted overblanket intended to be used without additional bedding over the occupant of the
bed, the heating element, electro-conductive textile, providing supplementary heat
3.5.105
pad
appliance comprising a flexible part having a heated area not exceeding 0,3 m on each face
and which is intended to heat part of the human body
If the pad is constructed in a cylindrical or similar form, the limit for the heated area is 0,6 m .
3.5.106
mattress
appliance for supporting the human body and which incorporates an upholstered flexible part
for heating the bed
Note 1 to entry: The appliance may be placed on the floor and referred to as a mat.
3.5.107
controlled appliance
appliance incorporating means in the flexible part, such as heating elements with PTC
characteristics or other means, for sensing changes in temperature when the appliance is
operated under normal operation, thus automatically controlling the average power input
3.5.108
moisture-proof appliance
appliance having a flexible part that is suitable for use under moist conditions
3.5.109
wrap
appliance comprising a flexible part intended to be draped over the human body in order to
keep it warm
3.6 Definitions relating to parts of an appliance
3.6.101
flexible part
all layers of material forming the permanent enclosure of the appliance together with the
heating element, electro-conductive textile, thermostats and all other current-carrying parts
contained within it
Note 1 to entry: The flexible part may be inside a detachable cover.
3.6.102
heating element
heating conductor, including any core and insulation, together with any other integrated
conductor
3.6.103
heated area
area of the flexible part enclosed within the outer perimeter of the heating element or electro-
conductive textile
It includes a margin outside the perimeter that has a width equal to 0,5 times the average
distance between adjacent runs of the heating element.
The heated area includes the return length of the heating element if the average distance
between this part and the adjacent heating element does not exceed the average distance
between adjacent runs of the heating element.

IEC 60335-2-17:2022 © IEC 2022 – 11 –
If a blanket or mattress has two separate heated areas, the surface between the two areas is
considered to be part of the heated areas, if at any place the distance between the two heating
elements does not exceed 1,5 times the average distance between adjacent runs of the
heating element.
3.6.104
bonded enclosure
enclosure of the flexible part that has the opposite faces joined together by means of an
adhesive or by welding
3.6.105
control unit
device, external to the flexible part, by means of which the average power input of the
appliance or the temperature of the flexible part can be adjusted or regulated
Note 1 to entry: Control units may be incorporated in the supply cord or at the end of an interconnection cord.
3.6.106
electro-conductive textile
material incorporating carbon or other conductive substance, together with any associated
insulation, which is connected to a pair of electrodes for the purpose of providing a heated
surface
3.6.107
heating element with PTC characteristics
heating element consisting of a pair of conductors separated by conductive material that has
a rapid non-linear increase in resistance when the temperature is raised through a particular
range
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.2 Modification:
The tests are carried out on two appliances, identified as appliance A and appliance B.
Addition:
If a further appliance is required in order to continue testing after a test of Clause 19, it shall be
adequately preconditioned taking into account 21.102 to 21.107.
For appliances having a bonded enclosure, additional appliances are required for the tests
of 21.108 and 21.111. For other appliances, a length of 15 m of heating element is required
for the tests of 21.111.
For moisture-proof pads subjected to the tests of 21.110, five additional appliances and 1 m
of enclosure material are required.
If heat-shrink material is used to insulate connections in the flexible part, a sample at least
150 mm in length is required for the test of 30.102.

– 12 – IEC 60335-2-17:2022 © IEC 2022
An additional appliance may be used for the test of 19.107.
Additional samples of pads may be used for the test of 30.101.
For appliances having a flexible part incorporating electro-conductive textile and a working
voltage above 24 V, an additional sample may be used for the test of 21.113.2 and a 1 m length
of sheet insulation is required for the test of 21.113.1.
5.3 Replacement:
The order in which the tests are carried out is as follows:
Appliance A: Clause 7, 22.11, Clause 8, 22.108, 10, 21.102 to 21.107, 22.104, Clauses 13, 15,
16, 17, 20, 25.15, 25.16, 19 (except 19.106), 21.108, 22.18, Clauses 30, 31 and 32. The tests
of Clauses 13, 15 and 16 are not carried out on class III appliances having a rated voltage
not exceeding 24 V or on class III constructions having a working voltage not exceeding
24 V.
Appliance B: Clauses 10, 11, 19.106, 21 (remainder), Clause 22 (remainder), Clauses 23, 24,
25 (remainder), Clauses 26, 27, 28, 29 and 14.
The flexible part of washable appliances is laundered twice in accordance with the instructions
before testing is started.
If it is evident from the construction of the appliance that a particular test is not applicable, the
test is not carried out.
5.5 Addition:
If the flexible part of the appliance is provided with a detachable cover, the tests are carried
out with or without this cover, whichever is more unfavourable. However, duvets are tested
without a detachable cover.
If the construction of a mattress incorporates a separate flexible part that is detachable, the
detachable flexible part is tested as an underblanket.
If the heating element can move in the channels, it is manipulated so that the individual runs
are placed in the most unfavourable position.
5.6 Addition:
When testing appliances for DC only, the possible influence of polarity on the operation of the
appliance is taken into account.
5.7 Modification:
For controlled blankets and mattresses, the tests of Clauses 10, 11 and 19 are carried out at
an ambient temperature of 15 °C ± 5 °C.
5.8.1 Addition:
Appliances for DC only are tested with DC.
5.8.101 Controlled appliances are supplied as specified for motor-operated appliances.

IEC 60335-2-17:2022 © IEC 2022 – 13 –
5.12 Replacement
For appliances, other than controlled appliances, when it is specified that the appliance has
to operate at the rated power input multiplied by a factor, the supply voltage is determined by
supplying the appliance at rated voltage until the heating element reaches its operating
temperature.
The supply voltage is then rapidly increased to the value necessary to give the power input
required for the relevant test, this value of the supply voltage being maintained throughout the
test.
5.101 Duvets and wraps are tested as overblankets.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Modification:
Appliances shall be class II or class III.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Modification:
Appliances shall be marked with the rated power input. If the appliance has two means of
connection to the supply, the rated power input shall be stated for each circuit separately and
the information provided on a single label.
The rated power input may be expressed as 2 × rated power input for each circuit in watts.
Other ways of expressing the rated power input may be used and the total given, provided they
do not give rise to misunderstanding.
Parts of class III construction shall not be marked with the rated voltage of the appliance.
Addition:
Flexible parts and detachable covers shall be marked with the name, trademark or
identification mark of the manufacturer or responsible vendor.
Detachable covers shall be marked with the model or type reference of the appliance with
which they are intended to be used.
The flexible part of appliances to be used with a detachable control unit shall be marked with
the reference of the control unit to be used.
The flexible part of appliances to be used with a detachable transformer shall be marked with
the reference of the transformer to be used.

– 14 – IEC 60335-2-17:2022 © IEC 2022
Flexible parts shall be marked with the substance of the following:
– symbol ISO 7000-0790 (2004-01), or by the text "Read the instructions";
– the sign shown in Figure 101, or by the text "Do not insert pins";
– the sign shown in Figure 102 "Not to be used by very young children (0-3 years)", or by
similar text;
– symbol ISO 7000-3114 (2011-10) and symbol ISO 7000-3124 (2011-10);
– intended orientation of blankets and mattresses (this marking is not required if the
appliance complies with 11.101, whichever way it is placed on the bed).
Underblankets, other than those having a heating element with PTC characteristics, shall
be marked with the sign shown in Figure 103 or by the text "Do not use folded or rucked".
Detachable covers shall be marked with the following:
• symbol ISO 7000-0790 (2004-01);
• sign of Figure 101.
The flexible part of blankets and detachable covers shall be marked with the appropriate
laundering symbols specified in ISO 3758. Washable appliances fitted with a non-detachable
flexible cord shall be marked with symbol ISO 7000-3125 (2011-10). Non-washable appliances
shall be marked with symbol ISO 7000-3123 (2011-10).
7.6 Addition:
[symbol ISO 7000-3114
do not dry clean
(2011-10)]
[symbol ISO 7000-3123
do not wash
(2011-10)]
[symbol ISO 7000-3124
do not bleach
(2011-10)]
[symbol ISO 7000-3125
wash by hand
(2011-10)]
7.12 Addition:
The instructions shall contain the substance of the following:
Important instructions. Retain for future use.
When the signs of Figure 101, Figure 102, Figure 103 or those in the addition to 7.6 are used,
the meaning shall be explained.
The instructions for blankets shall state whether the appliance is an overblanket or an
underblanket.
IEC 60335-2-17:2022 © IEC 2022 – 15 –
The instructions shall specify the appropriate settings of controls for continuous use of the
appliance.
The instructions for pads shall state that when the appliance is likely to be used for an extended
period, for instance by the user falling asleep, controls should be adjusted to a setting
recommended for continuous use. The instructions for blankets and mattresses shall state that
if the appliance is slept on with the controls set to a higher temperature the user can  suffer skin
burns or heat stroke.
The instructions for appliances provided with detachable control units or detachable
transformers shall state that the appliance is only to be used with the types that are marked
on the appliance.
The instructions for duvets shall state the length and width of the detachable cover to be used.
The instructions shall state the substance of the following:
– when not in use, store as follows (quote necessary instructions);
– when storing the appliance, allow it to cool down before folding;
– do not crease the appliance by placing items on top of it during storage (for blankets and
pads only);
– examine the appliance frequently for signs of wear or damage. If there are such signs, if the
appliance has been misused or does not work, return it to the supplier before switching it
on again;
– this appliance is not intended for medical use in hospitals;
– do not use if wet (this instruction is not required for moisture-proof appliances or class III
appliances);
– this appliance must not be used by persons insensitive to heat and other very vulnerable
persons who are unable to react to overheating;
– children under the age of three are not to use this appliance due to their inability to react to
overheating.
The instructions for underblankets shall state the substance of the following:
– the appliance should not be used on an adjustable bed; or
– if the appliance is used on an adjustable bed, check that the blanket and cord do not
become trapped or rucked, for example in hinges.
The instructions shall state that the appliance is not to be used by young children over the age
of three unless the controls have been pre-set by a parent or guardian, and unless the child
has been adequately instructed on how to operate the controls safely.
Washable appliances shall be provided with instructions for laundering. The instructions for
washable appliances fitted with a non-detachable cord shall state that the switch or control
unit must not be allowed to get wet during washing and that during drying the cord must be
positioned to ensure that water does not flow into the switch or control.
The instructions for non-washable appliances shall state how they can be cleaned, for example
with a damp sponge.
7.14 Modification:
Instead of petroleum spirit, liquid detergent is used to check the marking on fle
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