IEC 60695-2-11:2021

IEC 60695-2-11 ®
Edition 3.0 2021-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
HORIZONTAL PUBLICATION
Fire hazard testing –
Part 2-11: Glowing/hot-wire based test methods – Glow-wire flammability test
method for end products (GWEPT)

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IEC 60695-2-11 ®
Edition 3.0 2021-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
HORIZONTAL PUBLICATION
Fire hazard testing –
Part 2-11: Glowing/hot-wire based test methods – Glow-wire flammability test
method for end products (GWEPT)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.220.40; 29.020 ISBN 978-2-8322-4419-7

– 2 – IEC 60695-2-11:2021 RLV © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 2
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Test specimens . 9
4.1 General . 9
4.2 Complete end product . 9
4.3 Partial end product (alternative) . 9
4.4 Test considerations and limitations associated with the specimen
configuration . 9
5 Test apparatus . 10
6 Verification of the temperature measuring system . 10
7 Conditioning . 10
7.1 Conditioning of test specimens . 10
7.2 Conditioning of specified layers . 11
7.3 Testing conditions . 11
8 Test procedure . 11
8.1 General . 11
8.2 Test temperatures . 11
8.3 Number of test specimens . 12
9 Observations and measurements . 12
10 Evaluation of test results . 12
11 Test report . 13
12 Information to be given in the relevant product standard . 13
Annex A (informative) Suggested GWEPT temperatures . 14
Bibliography . 16

Figure 1 – Small parts . 10
Figure A.1 – Suggested GWEPT temperatures . 15

Table 1 – Test temperatures . 12

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end products (GWEPT)

FOREWORD
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This redline version of the official IEC Standard allows the user to identify the changes
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– 4 – IEC 60695-2-11:2021 RLV © IEC 2021
IEC 60695-2-11 has been prepared by IEC technical committee 89: Fire hazard testing. It is an
International Standard.
This third edition cancels and replaces the second edition published in 2014. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Numerous terms and definitions relevant to this document have been added to Clause 3.
The text of this International Standard is based on the following documents:
FDIS Report on voting
89/1536/FDIS 89/1544/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.
It has the status of a basic safety publication in accordance with IEC Guide 104.
This standard is to be used in conjunction with IEC 60695-2-10.
A list of all the parts in the IEC 60695 series, under the general title Fire hazard testing, can be
found on the IEC web site.
In this standard, the following print types are used:
• terms defined in Clause 3: in bold type
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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

INTRODUCTION
The purpose of this Introduction is to provide background regarding the basic guidance that
prompted the preparation of this International Standard and how it relates to the Scope.
In the design of any electrotechnical product, the risk of fire and the potential hazards
associated with fire need to be considered. In this respect the objective within the design of
component, circuit, and product design, as well as the choice of the materials, is to reduce to
acceptable levels the potential risks of fire during normal operating conditions, reasonable
foreseeable abnormal use, malfunction, and/or failure. IEC 60695-1-10 [1] , together with its
companion IEC 60695-1-11 [2], has been developed to provide guidance on how this is to be
accomplished.
The primary aims of IEC 60695-1-10 and IEC 60695-1-11 are to provide guidance on how to:
a) prevent ignition caused by an electrically energized component part, and
b) confine any resulting fire within the bounds of the enclosure of the electrotechnical product
in the event of ignition.
Secondary aims of IEC 60695-1-10 and IEC 60695-1-11 include the minimization of any flame
spread beyond the product’s enclosure and the minimization of harmful effects of fire effluents
such as heat, smoke, toxicity and/or corrosivity.
Fires involving electrotechnical products can also be initiated from external non-electrical
sources. Considerations of this nature should be are normally dealt with in the overall fire
hazard assessment.
In electrotechnical equipment, overheated metal parts can act as ignition sources. In glow-wire
tests, a glowing wire is used to simulate such an ignition source.
IEC 60695-2-10 describes a glow-wire test apparatus and common test procedure, IEC 60695-
2-12 [3] descri
...