IEC 60512-20-3:2010

Connectors for electronic equipment - Tests and measurements - Part 20-3: Fire hazard tests - Test 20c: Flammability, glow-wire

IEC 60512-20-3:2010 when required by the detail specification, is used for testing connectors within the scope of technical committee 48. It may also be used for similar devices when specified in a detail specification. The object of this standard is to detail a standard test method to determine the flammability of a connector when exposed to a glow-wire test under specified conditions. The glow-wire test simulates thermal stresses which may be produced by such sources of heat or ignition as, for example, glowing elements or overloaded components, for short periods, in order to assess by a simulation technique the fire hazard or burning of a single electronic component.

Connecteurs pour équipements électroniques - Essais et mesures - Partie 20-3: Essais relatifs aux risques du feu - Essai 20c: Inflammabilité, fil incandescent

La CEI 60512-20-3:2010 est utilisée pour les essais des connecteurs du domaine d'activité du comité d'études 48, lorsque la spécification particulière l'exige. Elle peut également être utilisée pour des dispositifs similaires lorsqu'une spécification particulière le stipule. L'objet de cette norme est de définir une méthode d'essai normalisée pour déterminer l'inflammabilité d'un connecteur exposé à un essai au fil incandescent dans des conditions déterminées. L'essai au fil incandescent simule les contraintes thermiques qui pourraient être produites par des sources de chaleur ou d'allumage, par exemple par des éléments incandescents ou des composants en surcharge, pendant de courtes durées, de manière à évaluer par une simulation technique les risques au feu ou la combustion d'un composant électronique individuel.

General Information

• Status: Published
• Publication Date: 09-Jun-2010
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 31.220.01 - Electromechanical components in general
• Technical Committee: SC 48B - Electrical connectors
• Current Stage: PPUB - Publication issued
• Start Date: 30-Jun-2010
• Completion Date: 10-Jun-2010

Standards Content (Sample)

IEC 60512-20-3 ®
Edition 1.0 2010-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Connectors for electronic equipment – Tests and measurements –
Part 20-3: Fire hazard tests – Test 20c: Flammability, glow-wire

Connecteurs pour équipements électroniques – Essais et mesures –
Partie 20-3: Essais relatifs aux risques du feu – Essai 20c: Inflammabilité, fil
incandescent
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 la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: [e-mail]
Web: 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.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: [e-mail]
Tel.: [phone]
Fax: [phone]
A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.
ƒ Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm
Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence,
texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées.
ƒ Just Published CEI: www.iec.ch/online_news/justpub
Restez informé sur les nouvelles publications de la CEI. Just Published détaille deux fois par mois les nouvelles
publications parues. Disponible en-ligne et aussi par email.
ƒ Electropedia: www.electropedia.org
Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé
Vocabulaire Electrotechnique International en ligne.
ƒ Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm
Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du
Service clients ou contactez-nous:
Email: [e-mail]
Tél.: [phone]
Fax: [phone]
IEC 60512-20-3 ®
Edition 1.0 2010-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Connectors for electronic equipment – Tests and measurements –
Part 20-3: Fire hazard tests – Test 20c: Flammability, glow-wire

Connecteurs pour équipements électroniques – Essais et mesures –
Partie 20-3: Essais relatifs aux risques du feu – Essai 20c: Inflammabilité, fil
incandescent
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
F
CODE PRIX
ICS 31.220.01 ISBN 978-2-88910-972-2
– 2 – 60512-20-3 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRONIC EQUIPMENT –
TESTS AND MEASUREMENTS –
Part 20-3: Fire hazard tests –
Test 20c: Flammability, glow-wire

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 60512-20-3 has been prepared by subcommittee 48B: Connectors,
of IEC technical committee 48: Electromechanical components and mechanical structures for
electronic equipment.
This standard cancels and replaces Test 20c of IEC 60512-9, issued in 1992. The structure of
IEC 60512 series is explained in IEC 60512-1-100.
The text of this standard is based on the following documents:
FDIS Report on voting
48B/2161/FDIS 48B/2196/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.

60512-20-3 © IEC:2010 – 3 –
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 60512 series, under the general title Connectors for electronic
equipment – Tests and measurements, can be found on the IEC website.
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.
– 4 – 60512-20-3 © IEC:2010
CONNECTORS FOR ELECTRONIC EQUIPMENT –
TESTS AND MEASUREMENTS –
Part 20-3: Fire hazard tests –
Test 20c: Flammability, glow-wire

1 Scope and object
This part of IEC 60512, when required by the detail specification, is used for testing
connectors within the scope of technical committee 48. It may also be used for similar devices
when specified in a detail specification.
The object of this standard is to detail a standard test method to determine the flammability of
a connector when exposed to a glow-wire test under specified conditions.
The glow-wire test simulates thermal stresses which may be produced by such sources of
heat or ignition as, for example, glowing elements or overloaded components, for short
periods, in order to assess by a simulation technique the fire hazard or burning of a single
electronic component.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60695-2-10, Fire hazard testing – Part 2-10: Glowing/hot-wire based test methods –
Glow-wire apparatus and common test procedure
IEC 60695-2-11, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products
3 Preparation of the specimen
The specimen shall consist of an unwired connector, mounted and provided with contacts as
specified in the detail specification.
4 Test method
The test shall be carried out in accordance with IEC 60695-2-10 and IEC 60695-2-11.
A wooden board covered with a single layer of tissue paper shall be placed underneath the
specimen to be tested as described in IEC 60695-2-10.
The position of the specimen and the place of application of glow-wire shall be as specified in
the detail specification.
The glow-wire consists of a specified loop of nickel/chromium (80/20) wire 4 mm diameter.
A sheathed fine-wire thermocouple, having an overall diameter of 0,5 mm and wires of NiCr
and NiAl with the welded point located inside the sheath, is used for measuring the
temperature of the glow-wire. The glow-wire with the thermocouple is shown in Figure 1.

60512-20-3 © IEC:2010 – 5 –
The test apparatus shall be so designed that the glow-wire is kept in a horizontal plane and a
force of 0,8 N to 1,2 N is applied to the specimen, the force being maintained at this value
when the glow-wire or the specimen is moved horizontally one towards the other over a
distance of at least 7 mm.
The temperature of the tip of the glow-wire and the duration of its application shall be
specified in the detail specification.
Table 1 – Preferred test temperatures
Preferred test temperatures Tolerances
°C °C
550 ±10
650 ±10
±10
±15
±15
Preferred duration of application: 30 s ± 1 s.
Dimensions in millimetres
Z
12 ± 1
R26 ± 2
0,6 ± 0,2
R20 ± 2
Detail Z
50 ± 2
70 min.
IEC  1225/10
Key
1 Glow-wire
2 Thermocouple
3 Stud
Glow-wire material: Nickel/Chromium (80/20)
Diameter: 4,0 mm ± 0,04 mm (before bending)
Diameter A: (After bending)
When forming the glow-wire loop, care shall be taken to avoid fine cracking at the tip.
NOTE Annealing is a suitable process for prevention of fine cracking at the tip.
Figure 1 – Glow-wire and position of the thermocouple
–1
A
– 6 – 60512-20-3 © IEC:2010
5 Requirements
After removal of the glow-wire, the specimen shall preferably not continue to burn. If it
continues to burn, the burning time shall not exceed the maximum limit specified in the detail
specification.
In no case shall any material drops ignite the underlying tissue paper.
6 Details to be specified
When this test is required by the detail specification, the following details shall be specified:
a) number and variant of the specimens to be tested;
b) mounting of the specimen;
c) severity (duration of the application of the glow-wire);
d) point of application of the glow-wire;
e) maximum burning time;
f) temperature of the glow-wire tip:
g) any deviation from the standard test method and/or conditions.

___________
– 8 – 60512-20-3 © CEI:2010
COMMISSION ÉLECTROTECHNIQUE
...