SIST EN 60335-2-106:2008

SLOVENSKI STANDARD
01-januar-2008
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Household and similar electrical appliances - Safety - Part 2-106: Particular requirements
for heated carpets and for heating units for room heating installed under removable floor
coverings
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-106:
Besondere Anforderungen für beheizte Teppiche und für Heizsysteme zur Raumheizung
unter abnehmbaren Fußbodenbelägen
Appareils électr odomestiques et analogues - Sécurité - Partie 2-106: Regles
particulieres pour les tapis chauffants et les unités chauffantes installées sous des
revetements de sol amovibles, pour le chauffage des locaux
Ta slovenski standard je istoveten z: EN 60335-2-106:2007
ICS:
13.120 Varnost na domu Domestic safety
97.100.10 (OHNWULþQLJUHOQLNL Electric heaters
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60335-2-106
NORME EUROPÉENNE
July 2007
EUROPÄISCHE NORM
ICS 97.100.10; 13.120
English version
Household and similar electrical appliances -
Safety -
Part 2-106: Particular requirements for heated carpets
and for heating units for room heating
installed under removable floor coverings
(IEC 60335-2-106:2007)
Appareils électrodomestiques  Sicherheit elektrischer Geräte
et analogues - für den Hausgebrauch
Sécurité - und ähnliche Zwecke -
Partie 2-106: Règles particulières Teil 2-106: Besondere Anforderungen
pour les tapis chauffants für beheizte Teppiche und für
et les unités chauffantes installées Heizsysteme zur Raumheizung
sous des revêtements de sol amovibles, unter abnehmbaren
pour le chauffage des locaux Fußbodenbelägen
(CEI 60335-2-106:2007) (IEC 60335-2-106:2007)

This European Standard was approved by CENELEC on 2007-05-01. 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.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat 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 own language and
notified to the Central Secretariat has the same status as the official versions.

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

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60335-2-106:2007 E

Foreword
The text of document 61/3220/FDIS, future edition 1 of IEC 60335-2-106, prepared by the IEC Technical
Committee 61, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 60335-2-106 on 2007-05-01.
The following dates are applicable:
- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-02-01
- date on which national standards
conflicting with the EN have to be withdrawn (dow) 2010-05-01
This part 2 has to be used in conjunction with EN 60335-1, Household and similar electrical appliances –
Safety – Part 1: General requirements. It was established on the basis of the 2002 edition of that standard.
Amendments and revisions of Part 1 have also to be taken into account and the dates when such changes
become applicable will be stated in the relevant amendment or revision of Part 1.
This part 2 supplements or modifies the corresponding clauses of EN 60335-1, so as to convert it into the
European Standard: Safety requirements for heated carpets and for heating units for room heating
installed under removable floor coverings.
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 of
Part 1 is to be adapted accordingly.
NOTE 1 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.;
- subclauses, notes and annexes that are additional to those in the IEC standard are prefixed with the letter Z.
NOTE 2 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.
Special national conditions causing a deviation from this European Standard are listed in Annex ZA and
are in addition to those in EN 60335-1.
There are no national deviations from this European Standard, other than those listed in Annex ZB to
EN 60335-1.
p NOTE  In this document, p is used in the margin to indicate instructions for preparing the printed version.
_____________
- 3 - EN 60335-2-106:2007
Introduction
p Add:
An investigation by CENELEC TC 61 has shown that all risks from products within the scope of this
standard are fully covered by the Low Voltage Directive, 2006/95/EC. For products having mechanical
moving parts, a risk assessment in accordance with the Machinery Directive, 2006/42/EC, has shown that
the risks are mainly of electrical origin and consequently this directive is not applicable. However, the
relevant essential safety requirements of the Machinery Directive are covered by this standard together
with the principal objectives of the Low Voltage Directive.
____________
Endorsement notice
The text of the International Standard IEC 60335-2-106:2007 was approved by CENELEC as a European
Standard without any modification.
____________
Bibliography
p Add the following notes to the standards mentioned:
IEC 60335-2-17: NOTE  Harmonized as EN 60335-2-17:2002 (not modified).
IEC 60335-2-81: NOTE  Harmonized as EN 60335-2-81:2003 (not modified).
IEC 60335-2-96: NOTE  Harmonized as EN 60335-2-96:2002 (not modified).
ISO 13732-1: NOTE  Harmonized as EN ISO 13732-1:2006 (not modified).

p Add:
Annex ZA
(normative)
Special national conditions
Addition:
Clause Special national condition
General Finland
Only Class III heating units are allowed.
_________
p Add:
Annex ZC
(normative)
Normative references to international publications
with their corresponding European publications
Publication Year Title EN/HD Year
IEC 60884-1 2002 Plugs and socket-outlets for household – –
and similar purposes –
Part 1: General requirements
____________
NORME CEI
INTERNATIONALE
IEC
60335-2-106
INTERNATIONAL
Première édition
STANDARD
First edition
2007-02
Appareils électrodomestiques et analogues –
Sécurité –
Partie 2-106:
Règles particulières pour les tapis chauffants
et les unités chauffantes installées sous des
revêtements de sol amovibles, pour le
chauffage des locaux
Household and similar electrical appliances –
Safety –
Part 2-106:
Particular requirements for heated carpets and for
heating units for room heating installed under
removable floor coverings
© IEC 2007 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
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МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60335-2-106 © IEC:2007 – 3 –
CONTENTS
FOREWORD.7
INTRODUCTION.11

1 Scope.13
2 Normative references .13
3 Definitions .13
4 General requirement.15
5 General conditions for the tests .15
6 Classification.17
7 Marking and instructions.17
8 Protection against access to live parts.21
9 Starting of motor-operated appliances .23
10 Power input and current .23
11 Heating .23
12 Void.27
13 Leakage current and electric strength at operating temperature.27
14 Transient overvoltages .27
15 Moisture resistance .27
16 Leakage current and electric strength.29
17 Overload protection of transformers and associated circuits .29
18 Endurance.29
19 Abnormal operation .35
20 Stability and mechanical hazards .39
21 Mechanical strength .39
22 Construction .43
23 Internal wiring.47
24 Components .47
25 Supply connection and external flexible cords .49
26 Terminals for external conductors.49
27 Provision for earthing .49
28 Screws and connections .51
29 Clearances, creepage distances and solid insulation .51
30 Resistance to heat and fire.51
31 Resistance to rusting.55
32 Radiation, toxicity and similar hazards.55

Annexes .73

Bibliography.75

60335-2-106 © IEC:2007 – 5 –
Figure 101 – Arrangement for testing heating units.57
Figure 102 – Arrangement for testing heating units to be used only above concrete or
similar floors .59
Figure 103 – Arrangement for measuring leakage current and electric strength of the
flexible part.61
Figure 104 – Jig for locating the contact needle .63
Figure 105 – Arrangement for the three-thickness fold test .65
Figure 106 – Equipment for flexing heating elements and internal wiring .67
Figure 107 – Equipment for the spark ignition test .69
Figure 108 – Details of the mask.71

Table 101 – Maximum temperature rises.27

60335-2-106 © IEC:2007 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––––
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-106: Particular requirements for heated carpets and for heating
units for room heating installed under removable floor coverings

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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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.
International Standard IEC 60335-2-106 has been prepared by IEC technical committee 61:
Safety of household and similar electrical appliances.
The text of this standard is based on the following documents:
FDIS Report on voting
61/3220/FDIS 61/3241/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.

60335-2-106 © IEC:2007 – 9 –
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 fourth edition (2001) 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 heated carpets and for
heating units for room heating installed under removable floor coverings.
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 maintenance result 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.
60335-2-106 © IEC:2007 – 11 –
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.
60335-2-106 © IEC:2007 – 13 –
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-106: Particular requirements for heated carpets and for heating
units for room heating installed under removable floor coverings

1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of
– heated carpets and similar appliances;
– heating units to heat the room in which they are located and that are intended to be
installed directly under a floor covering that is itself intended to be removable;
their rated voltage being not more than 250 V for single-phase installations and 480 V for
other installations.
NOTE 101 Examples of materials used as removable floor coverings are carpet, cushion vinyl, or loose laid
laminate.
NOTE 102 Attention is drawn to the fact that
– in many countries different wiring rules apply;
– 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 authorities for fire protection, the
national authorities for building regulations, the national health authorities, the national authorities responsible
for the protection of labour and similar authorities.
NOTE 103 This standard does not apply to
– appliances intended exclusively for industrial purposes;
– 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);
– blankets, pads and similar flexible heating appliances (IEC 60335-2-17);
– heated mats and foot warmers (IEC 60335-2-81);
– flexible sheet heating systems permanently incorporated in the floor of the building structure
(IEC 60335-2-96);
– flexible heating elements incorporated in other appliances.
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60884-1:2002, Plugs and socket-outlets for household and similar purposes – Part 1:
General requirements
3 Definitions
This clause of Part 1 is applicable except as follows.

60335-2-106 © IEC:2007 – 15 –
3.1.9 Addition:
Heating units are installed under a layer of material having a thermal resistance of
approximately 0,1 m²·K/W. Heating units, the current of which can vary depending on the
length of the heating element, and those that can supply other heating units are loaded so
that the current marked on the heating element flows through the heating unit.
3.101
heating unit
heating element equipped with means for connection to the supply
3.102
modular heating unit
a prefabricated assembly consisting of a heating unit and other materials
3.103
electrode
conductive part incorporated in a flexible sheet heating element for supplying the heating
material
3.104
flexible part
all layers of material forming the permanent enclosure of the appliance together with the
heating element, thermostats and all other current-carrying parts contained within it, which
are intended to be under or part of the floor covering
NOTE The flexible part may be provided with a detachable cover.
3.105
controlled appliance
appliance incorporating means in the flexible part for sensing the changes in temperature
when the appliance is operated under normal operation, thus automatically controlling the
average power input
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:
For laminated heated carpets, an additional appliance is required for the tests of 22.103.
For heating units, two additional appliances are required for the test of 18.102. For heating
units with deposited film or printed circuit heating elements, two additional appliances are
required for the test of 21.102.
For heated carpets that incorporate a wear indicator, such as a colour change, special
samples with the textile layer worn or removed to expose the indicator are required for the
tests of Clauses 11, 13, 18 and Subclauses 19.2, 19.101, 21.101, 21.102, 21.103 and 21.104.
NOTE 101 The tests of 21.101 and 21.104 may be carried out on separate appliances.

60335-2-106 © IEC:2007 – 17 –
5.3 Addition:
NOTE 101 The test of 21.101 may be carried out in conjunction with the conditioning in 18.102.2.
5.6 Addition:
Thermostats sensitive to room air temperature or outdoor air temperature are short circuited.
However, the thermostat is not short circuited if it can be set so that it does not cycle.
NOTE 101 For electronic controls, it may be necessary to render the sensing elements inoperative instead of
short circuiting the thermostat.
5.10 Addition:
For heating units that are cut to measure, the tests are carried out after connecting the
supply leads and protecting the edges in accordance with the instructions.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Addition:
If a heating unit is classified, the relevant requirements apply.
6.2 Addition:
Heating units and other floor mounted parts shall be at least IPX7.
Heated carpets and similar appliances shall be IPX7.
NOTE 101 This does not apply to the plug for appliances connected via a supply cord fitted with a plug or to wall
mounted controls.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Modification:
Instead of the marking of rated power input or rated current, the following applies:
Heating units shall be marked with their rated power input and the maximum rated current
at 20 ºC. Heating units that can be cut to measure shall be marked with their rated power
input per metre length.
Heating units shall be marked with their maximum current if
– the current can vary depending on the length of the heating unit;
– other heating units can be supplied through them.
Appliances with detachable controls shall be marked with the reference number or by other
means of identification of the control.

60335-2-106 © IEC:2007 – 19 –
Addition:
Heating units shall be marked with the indication of orientation, unless they are symmetrical.
The marking shall be repeated at least once every 0,5 m of the heating element or on each
section that can be cut to form a heating unit.
Heating units that can be cut to measure and have to be cut at specified places shall be
marked appropriately.
Heating units intended to be installed only above a floor of concrete or similar material shall
be permanently marked with the substance of the following:
In order to avoid a fire hazard, this heating unit is to be installed only above a floor of
concrete or similar material.
7.12 Addition:
The instructions shall contain the substance of the following:
This appliance is for indoor use only.
For heated carpets that incorporate a wear indicator such as a colour change, the instructions
shall clearly explain the purpose of the indicator and the action to be taken when it becomes
visible.
Modification:
The instructions concerning persons (including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge and children playing with the
appliance are not required.
7.12.1 Addition:
Instructions for installation shall include the substance of the following:
a) explanation of the marking, if necessary;
b) information for installing the heating units, in particular
• precautions to be taken to avoid damage during installation;
• dimensions and distances to be taken into account;
• a statement that heating units have to be separated from other heat sources;
• description of the fixing areas of the heating unit;
• guidance on how to avoid damage to a heating unit and its terminations due to
relative movement after installation;
• the lowest ambient temperature at which heating units may be installed;
• the minimum radius for bending the heating element, if applicable;
• precautions to be taken to avoid creasing the heating element;
• a statement that the heating unit is not to be installed on irregular surfaces;
• a statement that the heating unit is to be installed with the correct orientation if
applicable;
• a statement that the installation is to be in accordance with the national wiring rules;

60335-2-106 © IEC:2007 – 21 –
• a recommendation that the heating units are to be supplied through a residual current
device (RCD) having a rated residual operating current not exceeding 30 mA;
• how to interconnect heating units, giving the cross-sectional area of the leads and
type of leads, if applicable;
c) the maximum current allowed to flow through one heating unit when other heating units
are supplied through it or when the current can vary depending on its length;
d) list of controls including the statement that the appliance must only be used in conjunction
with these controls as they form part of the overheating protection system, unless they are
incorporated into the heating unit;
NOTE 101 Only those controls that are necessary to ensure compliance with the standard need be listed.
e) specification of any adhesive to be used;
f) a label as detailed in 7.101 is to be fixed adjacent to the distribution board.
7.12.101 The instructions for heating units that can be cut to measure shall state that the
installation work is only to be carried out by the manufacturer or its service agent in order to
avoid a hazard.
7.14 Addition:
The height of the lettering of the marking for heating units intended to be installed only
above a floor of concrete or similar material shall be at least 20 mm.
7.15 Addition:
The marking for heating units intended to be installed only above a floor of concrete or
similar material shall be visible during installation.
7.101 A label that contains sufficient space for the locations of the heating units to be listed
shall be provided for each installation (see 7.12.1 f) giving
– the name, trade mark or identification mark of the manufacturer or responsible vendor;
– the model or type reference;
– rated power input.
It shall state the substance of the following:
– where the heating units are installed;
– not to restrict the thermal emission of the heated floor;
NOTE The specific application is to be stated on the label.
– not to use fixing materials other than those recommended;
– not to insert nails or screws.
Compliance is checked by inspection.
8 Protection against access to live parts
This clause of Part 1 is applicable.

60335-2-106 © IEC:2007 – 23 –
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.
10.1 Addition:
NOTE 101 The requirement also applies to the rated power input per metre length of heating elements.
10.101 The power input of appliances having heating units incorporating PTC heating
elements 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.
11.1 Addition:
The tests are carried out in a room that is maintained at an ambient temperature of
° °
20 C ± 2 C.
11.2 Replacement:
Heating units intended to be installed only above a floor of concrete or similar material are
positioned in accordance with 11.2.103. Other heating units and heated carpets are installed
on top of the floor and are positioned in accordance with 11.2.102.
If a modular heating unit is provided with a thermostat having a separate floor sensor, the
sensor is located on one of the adjacent heating units
– on the centreline, or
– as per manufacturer's instructions,
but 300 mm ± 50 mm outside the area of the thermal insulation and at least 300 mm from the
edges of the test floor.
For other heating units provided with a thermostat having a separate floor sensor, the
sensor is located on
– the centreline of the heating unit, or
– as per manufacturer's instructions
but 300 mm ± 50 mm outside the area of the thermal insulation and at least 300 mm from the
edges of the test floor.
60335-2-106 © IEC:2007 – 25 –
11.2.101 Multiple heating units are installed in accordance with the instructions for
installation. They are arranged in a matrix, the heating unit under test being located in the
centre.
11.2.102 The appliance is placed on the test floor as shown in Figure 101 and a layer of
thermal insulation having a thermal resistance of approximately 5 m ·K/W is placed beneath
the surface of the test floor.
The test floor has a free space of at least 1,5 m above its upper surface.
A piece of thermal blocking insulation having a thermal resistance of approximately
1,25 m ·K/W is placed on the floor centrally across the heating units, as shown in
Figure 101. The insulation has a length of 0,8 m and a width
– of 0,8 m, for heated carpets;
– equal to that of the heating unit, for heating units.
NOTE In order to measure the highest temperature rise of the floor, it may be necessary to repeat the test with
the covering material having the minimum thickness specified in the instructions.
11.2.103 Heating units intended to be installed only above a floor of concrete or similar
material are placed on a test floor as shown in Figure 102. Thermal insulation having a
thermal resistance of approximately 2,5 m ·K/W is located under the heating units. A layer of
concrete at least 40 mm thick supports the thermal insulation. Instead of pouring concrete, the
concrete layer may consist of concrete slabs 40 mm thick and having dimensions at least
500 mm x 500 mm, the gaps between the slabs being filled with dry sand.
The test floor has a free space of at least 1,5 m above its upper surface.
A piece of thermal blocking insulation having a thermal resistance of approximately
1,25 m ·K/W is placed on the floor centrally across the heating units, as shown in
Figure 102. The insulation has a length of 0,8 m and a width equal to that of the heating unit.
11.3 Addition:
The temperature on top of the simulated carpet is measured by thermocouples attached to the
back of a blackened plate of copper or brass, 65 mm x 65 mm x 0,5 mm.
11.4 Addition:
Controlled appliances are operated under normal operation and supplied with the most
unfavourable voltage between 0,94 times and 1,06 times the rated voltage.
11.7 Replacement:
Appliances are operated until steady conditions are established.
11.8 Addition:
Temperature rises are also measured at the points indicated in Table 101 and shall not
exceed the values specified. The temperature rises at points away from the thermal blocking
insulation shall be measured at least 100 mm from the edges of the thermal blocking
insulation.
60335-2-106 © IEC:2007 – 27 –
Table 101 – Maximum temperature rises
Part Temperature rise
K
Top surface of the 0,1 m²·K/W thermal insulation layer or heated carpet
22 (60)
Wood of the test framework
60 (60)
NOTE The temperature limits under the thermal blocking insulation are in brackets.

12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.1 Addition:
Appliances are installed as specified in 11.2.
Two sheets of metal foil of sufficient size to cover the heated area are inserted, one above the
0,1 m²·K/W thermal insulation layer or heated carpet and one below the appliance, these
sheets being electrically connected together. A uniformly distributed load of approximately
35 kg/m² is placed on the top of the 0,1 m²·K/W thermal insulation layer.
The arrangement is shown in Figure 103.
13.2 Addition:
The leakage current is measured between any pole of the supply and the sheets of metal foil.
Screens and other earthing means are disconnected from earth.
Instead of the values specified, the leakage current shall not exceed 1 mA/m .
NOTE 101 If the total leakage current is above 10 mA, special installation in accordance with national wiring rules
may be required.
NOTE 102 The major part of the leakage current with these appliances is usually capacitive leakage.
13.3 Modification:
For the flexible part, the test voltage is applied between live parts and the 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.

60335-2-106 © IEC:2007 – 29 –
15.1 Addition:
The test is carried out directly on a heating unit.
15.1.1 Addition:
IPX7 heating units are immersed for 72 h.
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 replaced by the following.
18.101 The connections from the heating element to the supply leads and to
interconnection leads shall be reliable.
Compliance is checked by the tests of 18.101.1 or 18.101.2 as applicable.
18.101.1 For heating units with deposited film or printed circuit heating elements, the
heating unit is placed in a heating cabinet at a temperature of 20 °C ± 2 °C and is supplied
with a voltage so that the current is equal to the value marked on the heating unit or to the
rated current, as applicable. The voltage drop at each connection is measured.
NOTE 1 The length of the heating unit should be as short as possible but not less than 0,5 m.
NOTE 2 The heating unit is not moved after it has been placed in the cabinet.
NOTE 3 If the connections are made by using crimp connectors, the measurement is carried out between the
supply lead and the connector and also between the connector and the heating element. The measuring points are
as close as possible to the connections.
The heating unit is heated in cycles. Each cycle has a duration of 1 h and comprises
– a period of 30 min, during which
• the heating unit is supplied with the voltage that was applied when the voltage drop
was measured;
• for the first 20 min, the temperature of the heating cabinet is raised to 85 °C or to the
temperature of the heating element determined during the test of Clause 11, whichever
is lower;
• for the last 10 min, the temperature of the heating cabinet is maintained within ± 5 K of
this temperature;
– a period of 20 min, during which the temperature is lowered to approximately 30 °C;
– a stabilization period of 10 min.
NOTE 4 The temperature in the heating cabinet is measured at a distance of at least 50 mm from the heating
unit.
NOTE 5 Forced cooling may be used.

60335-2-106 © IEC:2007 – 31 –
The test is carried out for 400 cycles. The temperature of the heating cabinet is then reduced
to 20 °C ± 2 °C and the voltage drop at each connection is measured again.
The voltage drop shall not exceed 22,5 mV or 1,5 times the first value measured, whichever is
lower.
After the test, inspection shall show no damage to the extent that compliance with this
standard is impaired.
18.101.2 Portable heated carpets with any detachable cover removed are driven
backwards and forwards over a smooth horizontal roller having a diameter of 25 mm. The
appliance is arranged so that one end hangs vertically over the roller while the full length of
the other end is clamped to the driving means, which moves in a horizontal plane.
A clamp is attached to the end of the vertical part of the appliance over its full length. A mass
of 0,5 kg or equivalent to 3 g/mm of the length of the attached end, whichever is greater, is
attached to the clamp.
The stroke of the driving means is such that the greatest possible area is subjected to flexing.
The driving means is operated at a rate of approximately 125 mm/s for 1 000 cycles. The
appliance is then turned through 90° and subjected to a further 1 000 cycles.
NOTE 1 The test is car
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