IEC 60695-2-12:2010

Fire hazard testing - Part 2-12: Glowing/hot-wire based test methods - Glow-wire flammability index (GWFI) test method for materials

IEC 60695-2-12:2010 specifies the details of the glow-wire test to be applied to test specimens of solid electrical insulating materials or other solid materials for flammability testing to determine the glow-wire flammability index (GWFI). GWFI is the highest temperature, determined during this standardized procedure, at which the tested material; does not ignite or, if it does, extinguishes within 30 s after removal of the glow-wire and is not totally consumed, and molten drips, if they occur, do not ignite the wrapping tissue. This second edition includes the following significant technical changes from the previous edition:
- modified title;
- addition of an Introduction;
- clarification of Scope;
- expansion of Clause 2: Normative references;
- definitions added to Clause 3;
- revision of Clause 4 to alignment with the IEC 60695-11 series to introduce guidance on test programs for material variations;
- clarification of Clause 8: Conditioning (now Clause 7);
- deletion of Clause 9 "Initial measurements";
- expansion of Clause 10: Test procedures (now Clause 8);
- expansion of Clause 11: Observation and measurement (now Clause 9);
- clarification of Clause 12: Evaluation of test results (now Clause 10);
- expansion of Clause 13: Test report (now Clause 11).
This publication is to be read in conjunction with IEC 60695-2-10:2000 and IEC 60695-2-13:2010.

Essais relatifs aux risques du feu - Partie 2-12: Essais au fil incandescent/chauffant - Méthode d'essai d'indice d'inflammabilité au fil incandescent (GWFI) pour matériaux

La CEI 60695-2-12:2010 spécifie les détails de l'essai au fil incandescent quand il est appliqué à des éprouvettes d'essai de matériaux isolants électriques solides ou autres matériaux solides pour les essais d'inflammabilité dans le but de déterminer l'indice d'inflammabilité au fil incandescent (GWFI, glow-wire flammability index). Le GWFI est la température la plus élevée, déterminée durant cette procédure normalisée, à laquelle le matériau essayé; ne s'enflamme pas ou s'il s'enflamme, s'éteint dans les 30 s qui suivent le retrait du fil incandescent et n'est pas entièrement consumé, et gouttes en fusion, s'il y a lieu, n'enflamme pas le papier mousseline. Cette deuxième édition inclut les prochains changements techniques significatifs par rapport à l'édition précédente:
- modification du titre;
- ajout d'une Introduction;
- clarification du Domaine d'application;
- extension de l'Article 2: Références normatives;
- définitions ajoutées à l'Article 3;
- révision de l'Article 4 pour alignement avec la série CEI 60695-11 afin d'introduire des lignes directrices concernant les programmes d'essai pour les variations des matériaux;
- clarification de l'Article 8: Conditionnement (désormais Article 7);
- suppression de l'Article 9 "Mesures initiales";
- extension de l'Article 10: Méthodes d'essai (désormais Article 8);
- extension de l'Article 11: Observations et mesures (désormais Article 9);
- clarification de l'Article 12: Evaluation des résultats de l'essai (désormais Article 10);
- extension de l'Article 13: Rapport d'essai (désormais Article 11).
Cette publication doit être lue conjointement avec la CEI 60695-2-10:2000 et la CEI 60695-2-13:2010.

General Information

• Status: Published
• Publication Date: 10-Oct-2010
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: TC 89 - Fire hazard testing
• Drafting Committee: WG 12 - TC 89/WG 12
• Current Stage: DELPUB - Deleted Publication
• Start Date: 19-Mar-2018
• Completion Date: 08-Oct-2021

Relations

• Amended By: IEC 60695-2-12:2010/AMD1:2014 - Amendment 1 - Fire hazard testing - Part 2-12: Glowing/hot-wire based test methods - Glow-wire flammability index (GWFI) test method for materials
• Effective Date: 05-Sep-2023
• Revises: IEC 60695-2-12:2000 - Fire hazard testing - Part 2-12: Glowing/hot-wire based test methods - Glow-wire flammability test method for materials
• Effective Date: 05-Sep-2023
• Revised: IEC 60695-2-12:2021 - Fire hazard testing - Part 2-12: Glowing/hot-wire based test methods - Glow-wire flammability index (GWFI) test method for materials
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60695-2-12 ®
Edition 2.0 2010-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 2-12: Glowing/hot-wire based test methods – Glow-wire flammability index
(GWFI) test method for materials

Essais relatifs aux risques du feu –
Partie 2-12: Essais au fil incandescent/chauffant – Méthode d'essai d'indice
d’inflammabilité au fil incandescent (GWFI) pour matériaux

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or
IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
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IEC 60695-2-12 ®
Edition 2.0 2010-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 2-12: Glowing/hot-wire based test methods – Glow-wire flammability index
(GWFI) test method for materials

Essais relatifs aux risques du feu –
Partie 2-12: Essais au fil incandescent/chauffant – Méthode d'essai d'indice
d’inflammabilité au fil incandescent (GWFI) pour matériaux

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
M
CODE PRIX
ICS 13.220.40; 29.020 ISBN 978-2-88912-215-8
– 2 – 60695-2-12 © IEC:2010
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references.6
3 Terms and definitions .7
4 Test specimens .8
4.1 Test specimen preparation.8
4.2 Test specimen dimensions.8
4.3 Testing ranges in formulations .8
4.3.1 General .8
4.3.2 Density, melt flows and filler/reinforcement .9
4.3.3 Colour .9
5 Apparatus.9
6 Temperature measuring system verification .9
7 Conditioning and test conditions.9
7.1 Conditioning of test specimens .9
7.2 Conditioning of the wrapping tissue and the wooden board.9
7.3 Testing conditions.9
8 Test procedure .10
8.1 General .10
8.2 Initial test temperatures .10
8.3 Test temperatures .10
9 Observations and measurements .11
9.1 General .11
9.2 Initial observations.11
9.3 Test observations .11
10 Evaluation of test results.11
10.1 Test criteria .11
10.2 Glow-wire flammability index.11
11 Test report.12
Bibliography .13

Table 1 – Initial test temperatures .10

60695-2-12 © IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 2-12: Glowing/hot-wire based test methods –
Glow-wire flammability index (GWFI) test method for materials

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.
International Standard IEC 60695-2-12 has been prepared by technical committee 89: Fire
hazard testing.
This second edition of IEC 60695-2-12 cancels and replaces the first edition published in 2000.
It also constitutes a technical revision.
It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC
Guide 51.
This standard is to be used in conjunction with IEC 60695-2-10 and IEC 60695-2-13.
The main changes with respect to the previous edition are listed below:
– modified title;
– addition of an Introduction;
– clarification of Scope;
– 4 – 60695-2-12 © IEC:2010
– expansion of Clause 2: Normative references;
– definitions added to Clause 3;
– revision of Clause 4 to alignment with the IEC 60695-11 series to introduce guidance on
test programs for material variations;
– clarification of Clause 8: Conditioning (now Clause 7);
– deletion of Clause 9 “Initial measurements”;
– expansion of Clause 10: Test procedures (now Clause 8);
– expansion of Clause 11: Observation and measurement (now Clause 9);
– clarification of Clause 12: Evaluation of test results (now Clause 10);
– expansion of Clause 13: Test report (now Clause 11).
The text of this standard is based on the following documents:
FDIS Report on voting
89/1017/FDIS 89/1034/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,
...

IEC 60695-2-12 ®
Edition 2.1 2014-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 2-12: Glowing/hot-wire based test methods – Glow-wire flammability index
(GWFI) test method for materials
Essais relatifs aux risques du feu –
Partie 2-12: Essais au fil incandescent/chauffant – Méthode d'essai d'indice
d’inflammabilité au fil incandescent (GWFI) pour matériaux

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

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77, 86 and CISPR.
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A propos de l'IEC
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Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
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[e-mail].
IEC 60695-2-12 ®
Edition 2.1 2014-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ

Fire hazard testing –
Part 2-12: Glowing/hot-wire based test methods – Glow-wire flammability index

(GWFI) test method for materials

Essais relatifs aux risques du feu –

Partie 2-12: Essais au fil incandescent/chauffant – Méthode d'essai d'indice

d’inflammabilité au fil incandescent (GWFI) pour matériaux

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.220.40, 29.020 ISBN 978-2-8322-1398-8

IEC 60695-2-12 ®
Edition 2.1 2014-02
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 2-12: Glowing/hot-wire based test methods – Glow-wire flammability index
(GWFI) test method for materials
Essais relatifs aux risques du feu –
Partie 2-12: Essais au fil incandescent/chauffant – Méthode d'essai d'indice
d’inflammabilité au fil incandescent (GWFI) pour matériaux

– 2 – IEC 60695-2-12:2010
+AMD1:2014 CSV  IEC 2014
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 7
4 Test specimens . 8
4.1 Test specimen preparation . 8
4.2 Test specimen dimensions . 8
4.3 Testing ranges in formulations . 8
4.3.1 General . 8
4.3.2 Density, melt flows and filler/reinforcement . 9
4.3.3 Colour . 9
5 Apparatus . 9
6 Temperature measuring system verification . 9
7 Conditioning and test conditions . 9
7.1 Conditioning of test specimens . 9
7.2 Conditioning of the wrapping tissue and the wooden board . 9
7.3 Testing conditions. 10
8 Test procedure . 10
8.1 General . 10
8.2 Initial test temperatures . 10
8.3 Test temperatures . 10
9 Observations and measurements . 11
9.1 General . 11
9.2 Initial observations . 11
9.3 Test observations . 11
10 Evaluation of test results . 11
10.1 Test criteria . 11
10.2 Glow-wire flammability index . 12
11 Test report . 12
Bibliography . 13

Table 1 – Initial test temperatures . 10

+AMD1:2014 CSV  IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 2-12: Glowing/hot-wire based test methods –
Glow-wire flammability index (GWFI) test method for materials
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 fee
...