Household and similar electrical appliances - Safety -- Part 2-81: Particular requirements for foot warmers and heating mats (IEC 60335-2-81:2015)

IEC 60335-2-81:2015 deals with the safety of electric foot warmers and heating mats for household and similar purposes, their rated voltage being not more than 250 V. Appliances not intended for normal household use but which 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. It also does not take into account children playing with the appliance. It was established on the basis of the fifth edition (2010) of that standard. This third edition cancels and replaces the second edition published in 2002, its Amendment 1 (2007) and its Amendment 2 (2011). It constitutes a technical revision. The principal changes in this edition as compared with the second edition of IEC 60335-2-81 are as follows (minor changes are not listed):
- requirements for washable appliances (5.3, 7.1, 7.6, 7.12);
- requirements for controls in flexible cords (15.1.1, 24.2) and requirements for appliance inlets (22.105, 24.1.5, 29.1.3). 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 standard be adopted for implementation nationally not earlier than 12 months or later than 36 months from the date of its publication.
Key words: Foot warmer, heating element, heating mat

Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke -- Teil 2-81: Besondere Anforderungen an Fußwärmer und Heizmatten (IEC 60335-2-81:2015)

Appareils électrodomestiques et analogues - Sécurité -- Partie 2-81: Règles particulières pour les chancelières et les carpettes chauffantes électriques (IEC 60335-2-81:2015)

L'IEC 60335-2-81:2015 traite de la sécurité des chancelières et des carpettes chauffantes électriques destinées à un usage domestique ou analogue, dont la tension assignée n'est pas supérieure à 250 V. Les appareils non destinés à un usage domestique normal mais qui néanmoins peuvent constituer une source de danger pour le public, tels que les appareils destinés à être utilisés par des usagers non avertis dans des magasins, chez les artisans et dans les fermes, relèvent du domaine d'application de la présente norme. Dans la mesure du possible, la présente norme traite des dangers ordinaires présentés par les appareils, encourus par tous les individus à l'intérieur et autour de l'habitation. Cependant, cette norme ne tient pas compte en general; des personnes (y compris des enfants) dont; les capacités physiques, sensorielles ou mentales; ou; le manque d'expérience et de connaissance; les empêchent d'utiliser l'appareil en toute sécurité sans surveillance ou instruction ou de l'utilisation de l'appareil comme jouet par des enfants. Elle a été établie sur la base de la cinquième édition (2010) de cette norme.
Cette troisième édition annule et remplace la deuxième édition parue en 2002, son Amendement 1 (2007) et son Amendement 2 (2011). Elle constitue une révision technique. Par rapport à la deuxième édition de l'IEC 60335-2-81, les principales modifications indiquées ci-après ont été apportées dans la présente édition (les modifications mineures ne sont pas mentionnées):
- Exigences relatives aux appareils lavables (5.3, 7.1, 7.6, 7.12);
- Exigences relatives aux dispositifs de commande dans les câbles souples (15.1.1, 24.2) et les exigences relatives aux socles de connecteurs (22.105, 24.1.5, 29.1.3). L'attention des Comités nationaux est attirée sur le fait que les fabricants d'appareils et les organismes d'essai peuvent avoir besoin d'une période transitoire après la publication d'une nouvelle publication IEC, ou d'une publication amendée ou révisée, pour fabriquer des produits conformes aux nouvelles exigences et pour adapter leurs équipements aux nouveaux essais ou aux essais révisés. Le comité recommande que le contenu de cette publication soit entériné au niveau national au plus tôt 12 mois ou au plus tard 36 mois après la date de publication.
Mots-Clés: chancelière, élément chauffant, carpette chauffante

Gospodinjski in podobni električni aparati - Varnost - 2-81. del: Posebne zahteve za grelnike nog in grelna pregrinjala (IEC 60335-2-81:2015)

Standard IEC 60335-2-81:2015 obravnava varnost električnih grelnikov nog in grelnih pregrinjal za gospodinjsko in podobno uporabo, katerih nazivna napetost ne presega 250 V. Na področje uporabe tega standarda spadajo aparati, ki niso namenjeni običajni gospodinjski uporabi, vendar so vseeno lahko vir nevarnost za javnost, na primer aparati, ki so namenjeni za laično uporabo v trgovinah, lahki industriji ali na kmetijah. Ta standard v največji možni meri obravnava splošne nevarnosti, ki jih predstavljajo aparati ter s katerimi se srečujejo osebe doma in v okolici doma. Vendar na splošno ne vključuje primerov oseb (tudi otrok), ki zaradi fizičnih, senzoričnih ali umskih sposobnosti oziroma pomanjkanja izkušenj in znanja ne morejo varno uporabljati aparata brez nadzora ali navodil. Prav tako ne vključuje primerov otrok, ki se igrajo z aparatom. Pripravljen je bil na podlagi pete izdaje (2010) tega standarda. Tretja izdaja razveljavlja in nadomešča drugo izdajo, objavljeno leta 2002, vključno z njenim dopolnilom 1 (2007) in njenim dopolnilom 2 (2011). Ta izdaja je tehnično popravljena izdaja. Glavne spremembe te izdaje v primerjavi z drugo izdajo standarda IEC 60335-2-81 so naslednje (manjše spremembe niso navedene):
– zahteve za pralne aparate (5.3, 7.1, 7.6, 7.12);
– zahteve za krmilne elemente v gibkih kablih (15.1.1, 24.2) in zahteve za vhodne priključke aparatov (22.105, 24.1.5, 29.1.3). Nacionalni odbori morajo upoštevati, da bodo proizvajalci opreme in organizacije za preskušanje morda potrebovali prehodno obdobje po objavi nove, spremenjene ali popravljene objave IEC, da bodo lahko izdelovali izdelke v skladu z novimi zahtevami in se opremili za izvajanje novih ali spremenjenih preskusov. Odbor priporoča, da se vsebina tega standarda sprejme v nacionalno uporabo ne prej kot 12 mesecev oziroma najpozneje 36 mesecev od datuma objave.
Ključne besede: grelnik nog, grelni element, grelno pregrinjalo.

General Information

Status
Published
Publication Date
29-May-2023
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
24-May-2023
Due Date
29-Jul-2023
Completion Date
30-May-2023

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SLOVENSKI STANDARD
SIST EN IEC 60335-2-81:2023
01-julij-2023
Nadomešča:
SIST EN 60335-2-81:2003/A1:2007
SIST EN 60335-2-81:2003/A2:2012
Gospodinjski in podobni električni aparati - Varnost - 2-81. del: Posebne zahteve
za grelnike nog in grelna pregrinjala (IEC 60335-2-81:2015)
Household and similar electrical appliances - Safety -- Part 2-81: Particular requirements
for foot warmers and heating mats (IEC 60335-2-81:2015)
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke -- Teil 2-81:
Besondere Anforderungen an Fußwärmer und Heizmatten (IEC 60335-2-81:2015)
Appareils électrodomestiques et analogues - Sécurité -- Partie 2-81: Règles particulières
pour les chancelières et les carpettes chauffantes électriques (IEC 60335-2-81:2015)
Ta slovenski standard je istoveten z: EN IEC 60335-2-81:2023
ICS:
13.120 Varnost na domu Domestic safety
97.100.10 Električni grelniki Electric heaters
SIST EN IEC 60335-2-81:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60335-2-81:2023

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SIST EN IEC 60335-2-81:2023


EUROPEAN STANDARD
EN IEC 60335-2-81

NORME EUROPÉENNE

EUROPÄISCHE NORM
May 2023
ICS 13.120; 97.100.10 Supersedes EN 60335-2-81:2003; EN 60335-2-
81:2003/A1:2007; EN 60335-2-81:2003/A2:2012
English Version
Household and similar electrical appliances - Safety - Part 2-81:
Particular requirements for foot warmers and heating mats
(IEC 60335-2-81:2015)
Appareils électrodomestiques et analogues - Sécurité - Sicherheit elektrischer Geräte für den Hausgebrauch und
Partie 2-81: Exigences particulières pour les chancelières et
ähnliche Zw ecke - Teil 2-81: Besondere Anforderungen an
les carpettes chauffantes électriques
Fußw ärmer und Heizmatten
(IEC 60335-2-81:2015) (IEC 60335-2-81:2015)
This European Standard w as approved by CENELEC on 2022-03-14. CENELEC members are bound to comply w ith the CEN/CENELEC
Internal Regulations w hich stipulate the conditions for giving this European Standard the status of a national standard w ithout any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists 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 ow n 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, Norw ay, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sw eden, Switzerland,
Türkiye and the United Kingdom.


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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved w orldw ide for CENELEC Members.
 Ref. No. EN IEC 60335-2-81:2023 E

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SIST EN IEC 60335-2-81:2023
EN IEC 60335-2-81:2023 (E)
European foreword
This document (EN IEC 60335-2-81:2023) consists of the text of IEC 60335-2-81:2015 prepared by
IEC/TC 61 “Safety of household and similar electrical appliances”.
The following dates are fixed:
latest date by which this document has to be
• (dop) 2023-11-12
implemented at national level by publication of
an identical national standard or by
endorsement
latest date by which the national standards (dow) 2026-05-12


conflicting with this document have to be
withdrawn
This document supersedes EN 60335-2-81:2003, and all its amendments/corrigenda (if any).
This document is read in conjunction with EN IEC 60335-2-81:2023/A1:2023 and
EN IEC 60335-2-81:2023/A2:2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60335-2-81:2015 was approved by CENELEC as a European
Standard without any modification.

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SIST EN IEC 60335-2-81:2023



IEC 60335-2-81

®


Edition 3.0 2015-04




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Household and similar electrical appliances – Safety –

Part 2-81: Particular requirements for foot warmers and heating mats




Appareils électrodomestiques et analogues – Sécurité –

Partie 2-81: Exigences particulières pour les chancelières et les carpettes

chauffantes électriques
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 13.120, 97.100.10 ISBN 978-2-8322-2597-4



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN IEC 60335-2-81:2023
– 2 – IEC 60335-2-81:2015 © IEC 2015
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 General requirement . 9
5 General conditions for the tests . 9
6 Classification . 10
7 Marking and instructions . 10
8 Protection against access to live parts . 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 . 12
16 Leakage current and electric strength . 12
17 Overload protection of transformers and associated circuits . 12
18 Endurance . 12
19 Abnormal operation . 13
20 Stability and mechanical hazards . 13
21 Mechanical strength . 13
22 Construction . 16
23 Internal wiring . 16
24 Components . 17
25 Supply connection and external flexible cords . 17
26 Terminals for external conductors . 17
27 Provision for earthing . 17
28 Screws and connections . 17
29 Clearances, creepage distances and solid insulation . 17
30 Resistance to heat and fire . 18
31 Resistance to rusting . 20
32 Radiation, toxicity and similar hazards . 20
Annexes . 24
Bibliography . 25

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SIST EN IEC 60335-2-81:2023
IEC 60335-2-81:2015 © IEC 2015 – 3 –
Figure 101 – Equipment for the flexing test for foot warmers . 20
Figure 102 – Equipment for flexing heating elements and internal wiring . 21
Figure 103 – Equipment for the spark ignition test . 22
Figure 104 – Details of the mask . 23

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SIST EN IEC 60335-2-81:2023
– 4 – IEC 60335-2-81:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –

Part 2-81: Particular requirements for
foot warmers and heating mats

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.
This part of International Standard IEC 60335 has been prepared by IEC technical committee
61: Safety of household and similar electrical appliances.
This third edition cancels and replaces the second edition published in 2002, its Amendment 1
(2007) and its Amendment 2 (2011). It constitutes a technical revision.
The principal changes in this edition as compared with the second edition of IEC 60335-2-81
are as follows (minor changes are not listed):
• Requirements for washable appliances (5.3, 7.1, 7.6, 7.12);
• Requirements for controls in flexible cords (15.1.1, 24.2);
• Requirements for appliance inlets (22.105, 24.1.5, 29.1.3).

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SIST EN IEC 60335-2-81:2023
IEC 60335-2-81:2015 © IEC 2015 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
61/4841/FDIS 61/4896/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
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 foot warmers and
heating mats.
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 this publication 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.
The following differences exist in the countries indicated below.

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SIST EN IEC 60335-2-81:2023
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– 3.1.9: Normal operation is different (USA)
– 6.1: Class 0 appliances are allowed if their rated voltage does not exceed 150 V (Japan)
– 6.1: Class 0 and class I appliances are allowed (USA)
– 7.6: Symbols not permitted to replace required text (USA)
– 11.8: Temperature limit is different (USA)
– 13.2: Method and limit is different (USA)
– 19.2: The test is different (USA)
– 21.101: The test is different (USA)
– 22.101: The tests are different (USA)

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SIST EN IEC 60335-2-81:2023
IEC 60335-2-81:2015 © IEC 2015 – 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.
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 2-81: Particular requirements for
foot warmers and heating mats



1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric foot warmers and heating mats
for household and similar purposes, their rated voltage being not more than 250 V.
Appliances not intended for normal household use but which 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 101 Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour, and similar authorities.
NOTE 102 This standard does not apply to
– appliances specifically intended for use under medical supervision;
– electric blankets and pads (IEC 60335-2-17);
– electrically heated carpets;
– electrical heating appliances for breeding and rearing animals (IEC 60335-2-71).
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60320-1:2001, Appliance couplers for household and similar general purposes – Part 1:
General requirements
1
IEC 60320-1:2001/AMD1:2007
________________
1
There exists a consolidated edition 2.1 (2007) that includes the second edition and its Amendment 1.

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SIST EN IEC 60335-2-81:2023
IEC 60335-2-81:2015 © IEC 2015 – 9 –
ISO 2439, Flexible cellular polymeric materials – Determination of hardness (indentation
technique)
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions:
Foot warmers are unfilled and placed on a horizontal surface.
Heating mats are placed on a horizontal surface and covered by a piece of expanded
polystyrene having dimensions approximately 300 mm × 150 mm × 50 mm.
3 3
NOTE 101 The density of the polystyrene is approximately 20 kg/m ± 5 kg/m .
3.101
foot warmer
appliance into which the user's feet are inserted in order to warm them
3.102
heating mat
2
appliance having an area not exceeding 0,5 m , on which the user's feet are placed in order
to warm them
3.103
heating element with PTC characteristics
heating element of the appliance 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 Addition:
A 15 m length of heating element or internal wiring is required for the tests of 21.102.
Twelve samples of the enclosure material of foot warmers, each having dimensions
200 mm × 100 mm, are required for the test of 30.101.
5.3 Addition:
Washable appliances are laundered twice in accordance with the instructions before testing is
started.
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.

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5.5 Addition:
If the appliance is provided with a detachable cover, the tests are carried out with or without
this cover, whichever is more unfavourable.
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 Addition:
Washable appliances shall be marked with symbol ISO 7000-3114 (2012-04) and with symbol
ISO 7000-3124 (2012-04).
7.6 Addition:
[symbol ISO 7000-3114 (2012-04)] Do not dry clean

[symbol ISO 7000-3124 (2012-04)] Do not bleach

7.12 Addition:
The instructions shall state the substance of the following:
– the appliance is not to be used if there are signs of damage;
– the appliance is not to be used for warming animals;
– details regarding laundering or cleaning.
The instructions for foot warmers shall state that outdoor shoes must be removed before
use.
The instructions for heating mats shall state that the appliance has to be repaired or replaced
if the cover is worn. They shall explain how such wear can be observed.
The instructions for foot warmers intended to be used after preheating without supply and
incorporating an appliance inlet shall state that the cord set must be disconnected from the
supply after preheating.
If symbol ISO 7000-3114 (2012-04) and symbol ISO 7000-3124 (2012-04) are used, their
meaning shall be explained.

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SIST EN IEC 60335-2-81:2023
IEC 60335-2-81:2015 © IEC 2015 – 11 –
8 Protection against access to live parts
This clause of Part 1 is applicable.
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 except as follows.
10.101 The power input of appliances incorporating heating elements with PTC
characteristics shall significantly decrease with an increase in temperature.
Compliance is checked by the following test.
The appliance is supplied at rated voltage and operated under normal operation. The power
input shall have decreased by at least 50 % from the initial value when steady conditions are
established, any control operating during this period being short-circuited.
11 Heating
This clause of Part 1 is applicable except as follows:
11.2 Modification:
Appliances are placed as near as possible to one wall of the test corner and away from the
other wall.
11.3 Addition:
Thermocouples attached to the small blackened disks are also used for measuring the
temperature rise of the surface of the appliance.
11.7 Replacement:
Appliances are operated until steady conditions are established.
11.8 Modification:
When polyvinyl chloride is used for insulating heating elements, the temperature rise of the
insulation shall not exceed 80 K.
Addition:
The temperature rise of surfaces likely to be in contact with the user's feet shall not exceed
40 K.

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SIST EN IEC 60335-2-81:2023
– 12 – IEC 60335-2-81:2015 © IEC 2015
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.2 Modification:
When testing the top surface of heating mats, the dimensions of the metal foil are
300 mm × 150 mm.
NOTE 101 If the heating mat is reversible, each surface is tested in turn.
Addition:
Foot warmers are also tested with the inside surface completely covered with metal foil.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.1.1 Addition:
Appliances are subjected to the test of IEC 60529 as described in Subclause 14.2.1.
However, cord sets, switches and controls in the flexible cord are not subjected to the tests.
16 Leakage current and electric strength
This clause of Part 1 is applicable except
...

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