IEC 60331-2:2018
(Main)Tests for electric cables under fire conditions - Circuit integrity - Part 2: Test method for fire with shock at a temperature of at least 830 °C for cables of rated voltage up to and including 0,6/1,0 kV and with an overall diameter not exceeding 20 mm
Tests for electric cables under fire conditions - Circuit integrity - Part 2: Test method for fire with shock at a temperature of at least 830 °C for cables of rated voltage up to and including 0,6/1,0 kV and with an overall diameter not exceeding 20 mm
IEC 60331-2:2018 specifies the test method for cables which are required to maintain circuit integrity when subject to fire and mechanical shock under specified conditions.
This document is applicable to cables of rated voltage not exceeding 600 V/1 000 V, including those of rated voltage below 80 V, metallic data and telecom cables and optical fibre cables.
It is intended for use when testing cables of not greater than 20 mm overall diameter.
Cables of larger diameter are intended to be tested using the apparatus, procedure and requirements of IEC 60331-1.
This document includes details for the specific point of failure, continuity checking arrangement, test sample, test procedure and test report relevant to electric power and control cables with rated voltage up to and including 600 V/1000 V. Details for the specific point of failure, continuity checking arrangement, test sample, test procedure and test report relevant to metallic data and telecom cables and optical fibre cables are not given by IEC 60331-2.
Although the scope is restricted to cables with rated voltage up to and including 0,6/1,0 kV, the procedure can be used, with the agreement of the manufacturer and the purchaser, for cables with rated voltage up to and including 1,8/3 (3,3) kV, provided that suitable fuses are used.
Annex A provides the method of verification of the burner and control system used for the test.
Requirements are stated for an identification that may optionally be marked on the cable to signify compliance with this standard.
This second edition cancels and replaces the first edition published in 2009. It constitutes a technical revision.
The significant technical changes with respect to the previous edition are as follows:
– extension of the scope with metallic data and telecom cables and optical fibre cables, although details for the specific point of failure, continuity checking arrangement, test sample, test procedure and test report relevant to metallicdata and telecom cables and optical fibre cables are not given by IEC 60331-2;
– improved description of the test environment;
– mandatory use of mass flow meters/controllers as the means of controlling accurately the input flow rates of fuel and air to the burner;
– improved figure illustrating method of mounting of the sample regarding bending radius;
– improved description of the information to be included in the test report.
Essais pour câbles électriques soumis au feu – Intégrité des circuits – Partie 2: Méthode d’essai au feu avec chocs pour les câbles de tension assignée au plus égale à 0,6/1,0 kV et de diamètre externe inférieur ou égal à 20 mm, à une température d’au moins 830 °C
L'IEC 60331-2:2018 spécifie la méthode d'essai pour les câbles nécessaires afin de conserver l'intégrité du circuit quand ils sont soumis à un feu et à des chocs mécaniques dans des conditions spécifiées.
Le présent document s'applique aux câbles de tension assignée au plus égale à 600 V/1000 V, y compris ceux dont la tension assignée est inférieure à 80 V, aux câbles métalliques de données et de télécommunications ainsi qu'aux câbles à fibres optiques.
Elle est destinée à être utilisée pour soumettre à l'essai des câbles de diamètre externe inférieur ou égal à 20 mm.
Pour les câbles de diamètre plus grand, l'appareillage, la procédure et les exigences de l'IEC 60331-1 sont utilisés.
Le présent document inclut des informations concernant le point spécifique de défaillance, le dispositif de contrôle de la continuité, l'échantillon d'essai, la procédure d'essai et le rapport d'essai pertinents pour les câbles électriques de puissance et de commande de tension assignée au plus égale à 600 V/1000 V. Les informations concernant le point spécifique de défaillance, le dispositif de contrôle de la continuité, l'échantillon d'essai, la procédure d'essai et le rapport d'essai pertinents pour les câbles métalliques de données et de télécommunications et les câbles à fibres optiques ne sont pas données dans l'IEC 60331-2.
Bien que le domaine d'application soit limité aux câbles de tension assignée au plus égale à 0,6/1,0 kV, cette procédure peut être utilisée, après accord entre le fabricant et l'acheteur, pour les câbles de tension assignée au plus égale à 1,8/3 (3,3) kV, à condition d'utiliser des fusibles appropriés.
L'Annexe A donne la méthode de vérification du brûleur et le système de contrôle utilisé pour l'essai.
Des exigences sont indiquées pour une identification pouvant être éventuellement apposée par marquage sur le câble pour signifier sa conformité à la présente norme.
Cette deuxième édition annule et remplace la première édition parue en 2009. Elle constitue une révision technique;
Les modifications techniques majeures par rapport à l'édition précédente sont les suivantes:
– extension du domaine d'application aux câbles métalliques de données et de télécommunications et aux câbles à fibres optiques, bien que les informations concernant le point spécifique de défaillance, le dispositif de contrôle de la continuité, l'échantillon d'essai, la procédure d'essai et le rapport d'essai pour les câbles métalliques de données et de télécommunications et pour les câbles à fibres optiques ne soient pas données dans l'IEC 60331-2;
– amélioration de la description de l'environnement d'essai;
– utilisation obligatoire de débitmètres massiques/régulateurs comme moyens précis de contrôle des débits d'entrée de combustible et d'air au brûleur;
– amélioration de la figure représentant la méthode de montage de l'échantillon au niveau du rayon de courbure;
– amélioration de la description des informations à inclure dans le rapport d'essai.
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IEC 60331-2 ®
Edition 2.0 2018-03
INTERNATIONAL
STANDARD
GROUP SAFETY PUBLICATION
Tests for electric cables under fire conditions – Circuit integrity –
Part 2: Test method for fire with shock at a temperature of at least 830 °C for
cables of rated voltage up to and including 0,6/1,0 kV and with an overall
diameter not exceeding 20 mm
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
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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.
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IEC 60331-2 ®
Edition 2.0 2018-03
INTERNATIONAL
STANDARD
GROUP SAFETY PUBLICATION
Tests for electric cables under fire conditions – Circuit integrity –
Part 2: Test method for fire with shock at a temperature of at least 830 °C for
cables of rated voltage up to and including 0,6/1,0 kV and with an overall
diameter not exceeding 20 mm
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.220.40; 29.020; 29.060.20 ISBN 978-2-8322-5490-5
– 2 – IEC 60331-2:2018 © IEC 2018
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Test environment . 8
5 Test apparatus . 8
5.1 Test equipment . 8
5.2 Test wall and mounting . 12
5.3 Source of heat . 14
5.3.1 Burner . 14
5.3.2 Flow meters and flow rates . 15
5.3.3 Verification . 16
5.4 Shock-producing device . 16
5.5 Positioning of source of heat . 17
5.6 Continuity checking arrangements for electric power and control cables with
rated voltage up to and including 600 V/1 000 V . 17
5.7 Fuses. 17
6 Test specimen (electric power and control cables with rated voltage up to and
including 600 V/1 000 V) . 17
6.1 Test specimen preparation . 17
6.2 Test specimen mounting . 18
7 Test procedure (electric power and control cables with rated voltage up to and
including 600 V/1 000 V) . 18
7.1 Test equipment and arrangement . 18
7.2 Electrical connections . 18
7.3 Flame and shock application . 20
7.4 Electrification . 20
8 Performance requirements (electric power and control cables with rated voltage
up to and including 600 V/1 000 V) . 21
8.1 Flame application time . 21
8.2 Acceptance criteria . 21
9 Retest procedure . 21
10 Test report (electric power and control cables with rated voltage up to and
including 600 V/1 000 V) . 21
11 Cable marking . 21
Annex A (normative) Verification procedure for the source of heat . 22
A.1 Measuring equipment . 22
A.2 Procedure . 22
A.3 Evaluation . 22
A.4 Further verification . 23
A.5 Verification report . 23
Annex B (informative) Guidance on the choice of recommended test apparatus . 24
B.1 Burner and venturi . 24
B.2 Test wall material . 24
Bibliography . 25
Figure 1 – Schematic diagram of test configuration . 10
Figure 2 – Plan view of fire test equipment . 11
Figure 3 – End elevation of fire test equipment (not to scale) . 12
Figure 4 – Typical rubber bush (hardness: 50-60 shore A) for fastening wall . 14
Figure 5 – Burner face . 15
Figure 6 – Schematic diagram of an example of a burner control system . 16
Figure 7 – Example of method of mounting a sample for test . 18
Figure 8 – Basic circuit diagram – Electric power and control cables with rated voltage
up to 600 V/1 000 V . 20
Figure A.1 – Temperature measuring arrangement . 22
– 4 – IEC 60331-2:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TESTS FOR ELECTRIC CABLES UNDER FIRE CONDITIONS –
CIRCUIT INTEGRITY –
Part 2: Test method for fire with shock at a temperature of at least 830 °C
for cables of rated voltage up to and including 0,6/1,0 kV and with
an overall diameter not exceeding 20 mm
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 60331-2 has been prepared by IEC technical committee 20:
Electric cables.
This second edition cancels and replaces the first edition published in 2009. It constitutes a
technical revision.
The significant technical changes with respect to the previous edition are as follows:
– extension of the scope with metallic data and telecom cables and optical fibre cables,
although details for the specific point of failure, continuity checking arrangement, test
sample, test procedure and test report relevant to metallicdata an
...
IEC 60331-2 ®
Edition 2.0 2018-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
GROUP SAFETY PUBLICATION
Tests for electric cables under fire conditions – Circuit integrity –
Part 2: Test method for fire with shock at a temperature of at least 830 °C for
cables of rated voltage up to and including 0,6/1,0 kV and with an overall
diameter not exceeding 20 mm
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.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
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.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC 60331-2 ®
Edition 2.0 2018-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
GROUP SAFETY PUBLICATION
Tests for electric cables under fire conditions – Circuit integrity –
Part 2: Test method for fire with shock at a temperature of at least 830 °C for
cables of rated voltage up to and including 0,6/1,0 kV and with an overall
diameter not exceeding 20 mm
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.220.40; 29.020; 29.060.20 ISBN 978-2-8322-5550-6
– 2 – IEC 60331-2:2018 RLV © IEC 2018
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 Test conditions – Test environment . 8
5 Test apparatus . 9
5.1 Test equipment . 9
5.2 Test wall and mounting . 12
5.3 Source of heat . 14
5.3.1 Burner . 14
5.3.2 Flow meters and flow rates . 14
5.3.3 Verification . 16
5.4 Shock-producing device . 16
5.5 Positioning of source of heat . 16
5.6 Continuity checking arrangements for electric power and control cables with
rated voltage up to and including 600 V/1 000 V . 16
5.7 Fuses. 16
6 Test specimen(electric power and control cables with rated voltage up to and
including 600 V/1 000 V) . 17
6.1 Test specimen preparation . 17
6.2 Test specimen mounting . 17
7 Test procedure(electric power and control cables with rated voltage up to and
including 600 V/1 000 V) . 18
7.1 Test equipment and arrangement . 18
7.2 Electrical connections . 18
7.3 Flame and shock application . 19
7.4 Electrification . 19
8 Performance requirements(electric power and control cables with rated voltage up
to and including 600 V/1 000 V) . 20
8.1 Flame application time . 20
8.2 Acceptance criteria . 20
9 Retest procedure . 20
10 Test report (electric power and control cables with rated voltage up to and
including 600 V/1 000 V) . 20
11 Cable marking . 21
Annex A (normative) Verification procedure for the source of heat . 22
A.1 Measuring equipment . 22
A.2 Procedure . 22
A.3 Evaluation . 22
A.4 Further verification . 23
A.5 Verification report . 23
Annex B (informative) Guidance on the choice of recommended test apparatus . 24
B.1 Burner and venturi . 24
B.2 Test wall material . 24
Influence of draughts in the test chamber .
Guidance on provision of a suitable test chamber .
Bibliography . 26
Figure 1 – Schematic diagram of test configuration . 10
Figure 2 – Plan view of fire test equipment . 11
Figure 3 – End elevation of fire test equipment (not to scale) . 12
Figure 4 – Typical rubber bush (hardness: 50-60 shore A) for fastening wall . 13
Figure 5 – Burner face . 14
Figure 6 – Schematic diagram of an example of a burner control system using
rotameters . 15
Figure 7 – Example of method of mounting a sample for test . 17
Figure 8 – Basic circuit diagram – Electric power and control cables with rated voltage
up to 600 V/1 000 V . 19
Figure A.1 – Temperature measuring arrangement . 22
– 4 – IEC 60331-2:2018 RLV © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TESTS FOR ELECTRIC CABLES UNDER FIRE CONDITIONS –
CIRCUIT INTEGRITY –
Part 2: Test method for fire with shock at a temperature of at least 830 °C
for cables of rated voltage up to and including 0,6/1,0 kV and with
an overall diameter not exceeding 20 mm
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.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in
...
IEC 60331-2 ®
Edition 2.0 2018-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Tests for electric cables under fire conditions – circuit integrity –
Part 2: Test method for fire with shock at a temperature of at least 830 °C for
cables of rated voltage up to and including 0,6/1,0 kV and with an overall
diameter not exceeding 20 mm
Essais pour câbles électriques soumis au feu – intégrité des circuits –
Partie 2: Méthode d'essai au feu avec chocs pour les câbles de tension assignée
au plus égale à 0,6/1,0 kV et de diamètre externe inférieur ou égal à 20 mm, à une
température d'au moins 830 °C
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
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Switzerland
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.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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IEC 60331-2 ®
Edition 2.0 2018-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Tests for electric cables under fire conditions – circuit integrity –
Part 2: Test method for fire with shock at a temperature of at least 830 °C for
cables of rated voltage up to and including 0,6/1,0 kV and with an overall
diameter not exceeding 20 mm
Essais pour câbles électriques soumis au feu – intégrité des circuits –
Partie 2: Méthode d'essai au feu avec chocs pour les câbles de tension assignée
au plus égale à 0,6/1,0 kV et de diamètre externe inférieur ou égal à 20 mm, à
une température d'au moins 830 °C
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.20 ISBN 978-2-8322-6151-4
– 2 – IEC 60331-2:2018 © IEC 2018
CONTENTS
CONTENTS . 2
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Test environment . 8
5 Test apparatus . 8
5.1 Test equipment . 8
5.2 Test wall and mounting . 11
5.3 Source of heat . 13
5.3.1 Burner . 13
5.3.2 Flow meters and flow rates . 14
5.3.3 Verification . 15
5.4 Shock-producing device . 15
5.5 Positioning of source of heat . 16
5.6 Continuity checking arrangements for electric power and control cables with
rated voltage up to and including 600 V/1 000 V . 16
5.7 Fuses. 16
6 Test specimen (electric power and control cables with rated voltage up to and
including 600 V/1 000 V) . 16
6.1 Test specimen preparation . 16
6.2 Test specimen mounting . 17
7 Test procedure (electric power and control cables with rated voltage up to and
including 600 V/1 000 V) . 17
7.1 Test equipment and arrangement . 17
7.2 Electrical connections . 17
7.3 Flame and shock application . 19
7.4 Electrification . 19
8 Performance requirements (electric power and control cables with rated voltage
up to and including 600 V/1 000 V) . 20
8.1 Flame application time . 20
8.2 Acceptance criteria . 20
9 Retest procedure . 20
10 Test report (electric power and control cables with rated voltage up to and
including 600 V/1 000 V) . 20
11 Cable marking . 20
Annex A (normative) Verification procedure for the source of heat . 21
A.1 Measuring equipment . 21
A.2 Procedure . 21
A.3 Evaluation . 21
A.4 Further verification . 22
A.5 Verification report . 22
Annex B (informative) Guidance on the choice of recommended test apparatus . 23
B.1 Burner and venturi . 23
B.2 Test wall material . 23
Bibliography . 24
Figure 1 – Schematic diagram of test configuration . 9
Figure 2 – Plan view of fire test equipment . 10
Figure 3 – End elevation of fire test equipment (not to scale) . 11
Figure 4 – Typical rubber bush (hardness: 50-60 shore A) for fastening wall . 13
Figure 5 – Burner face . 14
Figure 6 – Schematic diagram of an example of a burner control system . 15
Figure 7 – Example of method of mounting a sample for test . 17
Figure 8 – Basic circuit diagram – Electric power and control cables with rated voltage
up to 600 V/1 000 V . 19
Figure A.1 – Temperature measuring arrangement . 21
– 4 – IEC 60331-2:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TESTS FOR ELECTRIC CABLES UNDER FIRE CONDITIONS –
CIRCUIT INTEGRITY –
Part 2: Test method for fire with shock at a temperature of at least 830 °C
for cables of rated voltage up to and including 0,6/1,0 kV and with
an overall diameter not exceeding 20 mm
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
interna
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