Amendment 1 - Household and similar electrical appliances - Safety - Part 2-17: Particular requirements for blankets, pads, clothing and similar flexible heating appliances

Amendement 1 - Appareils électrodomestiques et analogues - Sécurité - Partie 2-17: Exigences particulières pour les couvertures, coussins, vêtements et appareils chauffants souples analogues

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Published
Publication Date
22-Jul-2015
Current Stage
PPUB - Publication issued
Start Date
23-Jul-2015
Completion Date
23-Jul-2015
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IEC 60335-2-17:2012/AMD1:2015 - Amendment 1 - Household and similar electrical appliances - Safety - Part 2-17: Particular requirements for blankets, pads, clothing and similar flexible heating appliances
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IEC 60335-2-17
Edition 3.0 2015-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
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
IEC 60335-2-17:2012-03/AMD1:2015-07(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60335-2-17
Edition 3.0 2015-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
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 978-2-8322-2782-4

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
---------------------- Page: 3 ----------------------
– 2 – IEC 60335-2-17:2012/AMD1:2015
© IEC 2015
FOREWORD

This amendment has been prepared by IEC technical committee 61: Safety of household and

similar electrical appliances.
The text of this amendment is based on the following documents:
CDV Report on voting
61/4834/CDV 61/4910/RVC

Full information on the voting for the approval of this amendment can be found in the report

on voting indicated in the above table.

The committee has decided that the contents of this amendment and the base publication will

remain unchanged until the stability date indicated on the IEC website 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 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.

_____________
2 Normative references
Replace the reference to ISO 3758 by the following:
ISO 7000:2014, Graphical symbols for use on equipment – Registered symbols
3 Terms and definitions
3.101 Add "electro-conductive textile," after "heating element,".
3.104 Replace the existing text by the following:
3.104 Void
3.106 Add "electro-conductive textile," after "heating element,".
3.108 Replace the term definition by the following:

appliance for supporting the human body and which incorporates an upholstered flexible part

for heating the bed
Add the following Note 1 to entry:
---------------------- Page: 4 ----------------------
IEC 60335-2-17:2012/AMD1:2015 – 3 –
© IEC 2015

Note 1 to entry: The appliance may be placed on the floor and referred to as a mat.

3.110 Replace the term definition by the following

heating conductor, including any core and insulation, together with any other integrated

conductor
3.116 Replace the term definition by the following:

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
5 General conditions for the tests
5.2 Add the following to the addition:

For appliances having a flexible part incorporating electro-conductive textile and a

working voltage above 24 V, an additional sample may be required for the test of 21.113.2

and a 1 m length of sheet insulation will be required for the test of 21.113.1.

5.3 Add the following to the replacement as a new second sentence to the paragraph

starting with “Appliance A…….”:

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.
5.5 Add the following after the first paragraph of the addition:

If the construction of a mattress incorporates a separate flexible part that is detachable, the

detachable flexible part is tested as an underblanket.
6 Classification
6.1 Delete the second sentence of the modification.
7 Marking and instructions

7.1 Add the following as a new fourth dashed item to the fifth paragraph of the addition:

– symbol ISO 7000-3114 (2012-04) and symbol ISO 7000-3124 (2012-04);
---------------------- Page: 5 ----------------------
– 4 – IEC 60335-2-17:2012/AMD1:2015
© IEC 2015
7.6 Replace the symbols in the addition by the following:
[symbol ISO 7000-3114 (2012-04)] Do not dry clean
[symbol ISO 7000-3123 (2012-04)] Do not wash
[symbol ISO 7000-3124 (2012-04)] Do not bleach
[symbol ISO 7000-3125 (2012-04)] Wash by hand
Not to be used by very young children (0-3 years)

7.12 Replace the first sentence and the second sentence of the third paragraph of the

addition starting “The instructions shall contain …” by "When the symbols of Figure 101,

Figure 102 or those in the addition to 7.6 are used, they shall be explained".
Delete the fifth paragraph of the addition starting with “The instructions for
underblankets.....”.

In the third to last paragraph of the addition replace "guardian, or unless the child" by

"guardian, and unless the child".
11 Heating

11.2 In the second paragraph of the addition, replace "Wraps" by "Wraps, other than those

having heating elements with PTC characteristics,".
11.3 Replace the second paragraph by the following:

Thermocouples used for determining the temperature of the surface of electro-conductive

textiles are fixed by means of thin adhesive tape.
11.8 Replace the second sentence by the following:

If the flexible part is comprised of electro-conductive textile, the values specified for

heating elements are applicable to the surface of supplementary insulation or reinforced

insulation, or to the conductive surface if there is no insulation.
---------------------- Page: 6 ----------------------
IEC 60335-2-17:2012/AMD1:2015 – 5 –
© IEC 2015
13 Leakage current and electric strength at operating temperature
13.1 Delete the modification.
15 Moisture resistance
15.1 Delete the second paragraph of the addition.
16 Leakage current and electric strength
16.1 Delete the addition.
19 Abnormal operation

19.1 Replace the second, third, fourth and fifth paragraphs of the modification by the

following:
Blankets are subjected to the tests of 19.102 and 19.108.

Pads are subjected to the tests of 19.108, and 19.110. Controlled pads are also subjected to

the tests of 19.109.
Mattresses are subjected to the tests of 19.108 and 19.113

19.13 In the fourth paragraph, add "or electro-conductive textiles" after "heating

elements".
19.101 Replace this subclause by the following:
19.101 Void
19.102 Replace the existing text by the following:

Blankets are operated under normal operation except that the flexible part is uncovered

and folded at the most unfavourable place with a five-thickness fold having the most

unfavourable dimensions. A sheet of thermal insulation as specified in Annex AA, having

dimensions of 300 m × 450 mm × 72 mm, is placed on the folded blanket at the most

unfavourable location. An evenly distributed mass of 5 kg is placed on the sheet of thermal

insulation.
The widths of each fold may be different and a sandbag may be used as the mass.

If the blanket cannot be folded with five thicknesses, it is tested as a mattress.

The appliance is supplied with a voltage at the upper limit of the range specified in 19.1.

---------------------- Page: 7 ----------------------
– 6 – IEC 60335-2-17:2012/AMD1:2015
© IEC 2015
19.103 Replace this subclause by the following:
19.103 Void
19.104 Replace this subclause by the following:
19.104 Void
19.105 Replace this subclause by the following:
19.105 Void
19.106 Replace this subclause by the following:
19.106 Void

19.107 In the first sentence replace "19.101 to 19.106" by "19.102, 19.110 and 19.113".

Delete "of the fold" at the end of the first sentence.
19.109 In the first line replace "Pads" by "Controlled pads".
19.110 Replace this subclause by the following:
19.110 Pads are operated under normal operation except that the flexible part is

uncovered and folded at the most unfavourable place with a three-thickness fold having the

most unfavourable dimensions. A sheet of thermal insulation as specified in Annex AA, having

dimensions of 300 mm × 450 mm × 72 mm, is placed on the folded pad at the most

unfavourable location. An evenly distributed mass of 5 kg is placed on the sheet of thermal

insulation.
The widths of each fold may be different and a sandbag may be used as the mass.
Add the following new subclause:

19.113 Mattresses are operated under normal operation except that the flexible part is

uncovered and five runs of the heating element are bunched together in the most

unfavourable way. Sufficient material of the permanent enclosure of the flexible part is

removed at the most unfavourable location to get access to the heating element runs. The

heating element runs are bunched over a length of 150 mm and secured by thin high-

temperature tape which is not to be overlapped more than once. A sheet of thermal insulation

as specified in Annex AA, having dimensions of 300 mm × 450 mm × 72 mm, is placed on the

bunched heating element at the most unfavourable location. An evenly distributed mass of

5 kg is placed on the sheet of thermal insulation. A sandbag may be used as the mass.

If the construction does not allow the heating element runs to be bunched together, the

heating element assembly is removed from the mattress and subjected to the test of 19.102.

21 Mechanical strength

21.1 In the first dashed item of the third paragraph of the addition, replace "busbars" by

"electrodes" (in 2 places) and replace "material" by "textile".
---------------------- Page: 8 ----------------------
IEC 60335-2-17:2012/AMD1:2015 – 7 –
© IEC 2015

In the third paragraph of the addition, add the following after the first dashed item:

– breakage of any conductive thread of electro-conductive textiles;

In the existing first dashed item of the third paragraph of the addition replace the 2 dot items

by dashed items and print in italics.
21.2 Add the following to the addition:

except those incorporating electro-conductive textile having a working voltage above 24 V.

21.105 Replace the subclause by the following:

21.105 Appliances are operated continuously under the conditions specified in Clause 11.

Non-controlled appliances and controlled appliances having a metallic temperature sensor

are tested for 500 h. Other appliances are operated for 1 000 h. The surface temperature of

the flexible part of controlled appliances is measured under steady conditions at the

beginning and at the end of this period. It shall not have increased by more than 5 K.

For appliances with heating elements with PTC characteristics, the test is carried out with

the flexible part fully covered with a sheet of thermal insulation, as specified in Annex AA,

having a thickness of 90 mm. However, the temperature of the heating element with PTC

characteristic is measured after 100 h and at the end of the test under the conditions

specified in Clause 11. It shall not have increased by more than 5 K.
21.111 Add the following to the requirement:

The requirement does not apply to Class III appliances having a rated voltage not

exceeding 24 V or to Class III constructions having a working voltage not exceeding 24 V.

21.111.1 Add the following as a new third paragraph:

The diameter of the pulley is increased to 60 mm and the initial load to 0,5 kg for heating

elements with PTC characteristics used in mattresses. The width and form of the groove of

the pulley are to be appropriate for the sample under test.

21.111.2 At the end of the first paragraph, replace "only the outer layer is removed." by "only

the outer layer is pulled off and tested."
Add the following subclauses:

21.113 The insulation of flexible parts incorporating electro-conductive textile shall retain

adequate flexibility and insulating characteristics throughout the life of the appliance. The

requirement does not apply to Class III appliances having a rated voltage not exceeding

24 V or to Class III constructions having a working voltage not exceeding 24 V.

Compliance is checked by the tests of 21.113.1 and 21.113.2 when the insulation exceeds

– a temperature of 75 °C for controlled appliances or a temperature rise of 50 K for other

appliances during the test of Clause 11; or

– a temperature of 135 °C for controlled appliances or a temperature rise of 110 K for

other appliances during the tests of Clause 19.
The tests are carried out on new samples of the flexible part.
---------------------- Page: 9 ----------------------
– 8 – IEC 60335-2-17:2012/AMD1:2015
© IEC 2015

21.113.1 Twelve samples having the shape as shown in Figure 114 are stamped from the

supplementary insulation or reinforced insulation, six from the longitudinal direction and

six from the lateral direction. If the insulation is integrated with the fabric supporting the

conductive threads, the test is not carried out.

Three samples from each direction are conditioned by suspending them vertically so that they

hang freely in a heating cabinet, having forced air circulation, at a temperature of

125 °C ± 2 °C for 336 h. The samples are removed from the cabinet and allowed to cool down

to room temperature. When the material has stabilized, the length of the samples is measured

and shall not be less than 90 % of the original length.

The 12 samples are placed in a tensile machine in turn. The machine is operated at a uniform

speed of 500 mm/min ± 50 mm/min. The force and elongation at the instant of rupture are

determined.

The elongation of each of the unconditioned samples shall not be less than 100 % and their

tensile strength shall not be less than 8,75 MPa.

The average value of both the elongation and the tensile strength of the conditioned samples

shall not be less than 75 % of the average value determined for the unconditioned samples.

21.113.2 Twelve samples having dimensions 200 mm × 100 mm are cut from the electro-

conductive textile, any other covering being removed. At least one sample is to include a

portion of electrode. The samples are then tightly rolled on a metal mandrel having a diameter

of 25 mm along the line of the conductive threads, if any. The roll may be held together by

suitable tape.

They are then placed in a heating cabinet having forced air circulation at a temperature of

125 °C ± 2 °C for 336 h. The samples are removed from the cabinet and allowed to cool down

to room temperature. They are then unwound and removed from the mandrel.

A sample is then placed centrally on a metal plate having dimensions of 180 mm × 80 mm and

a similar plate placed on top and weighted so that the applied mass is 5 kg. The sample is

then subjected to the electric strength test of 16.3. The other 11 samples are then tested in

the same way in turn.
Inspection shall show th
...

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