IEC 60331-2:2009

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 60331-2:2009 specifies the test apparatus and procedure and gives the performance requirements, including recommended flame application times, for low-voltage power cables of rated voltage up to and including 0,6/1,0 kV and control cables with a rated voltage which are required to maintain circuit integrity when subject to fire and mechanical shock under specified conditions. It is intended for use when testing cables not greater than 20 mm overall diameter. NOTE Cables of larger diameter should be tested using the apparatus, procedure and requirements of IEC 60331-1. This standard describes the means of test specimen preparation, the continuity checking arrangements, the electrical testing procedure, the method of burning the cables and the method of shock production, and gives requirements for evaluating test results. 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. It has the status of a horizontal standard in accordance with IEC Guide 104.

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

La CEI 60331-2:2009 donne des précisions sur l'appareillage, la procédure d'essai et les exigences de performance, y compris des recommandations pour la durée des temps d'application de la flamme, pour les câbles de puissance à basse tension, de tension assignée au plus égale à 0,6/1,0 kV, et les câbles de contrôle ayant une tension assignée, qui sont réputés conserver l'intégrité du circuit quand ils sont soumis à un incendie et à des chocs mécaniques dans des conditions spécifiées. Elle est prévue pour être utilisée pour essayer des câbles de diamètre externe inférieur ou égal à 20 mm. NOTE Pour les câbles de diamètre plus grand, il convient d'utiliser l'appareillage, la procédure et les exigences de la CEI 60331-1. Cette norme décrit les moyens de préparation de l'éprouvette d'essai, les dispositions de contrôle de la continuité du circuit, la procédure d'essai électrique, la méthode pour brûler les câbles et la méthode de production des chocs, et indique les exigences pour évaluer les resultats. L'Annexe A donne la méthode de vérification du brûleur et le système de contrôle utilisé pour l'essai. Les conditions requises sont indiquées pour une identification signifiant la conformité à la présente norme par un éventuel marquage sur le câble. Elle a le statut de norme horizontale conformément au IEC Guide 104.

General Information

• Status: Published
• Publication Date: 18-May-2009
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 29.020 - Electrical engineering in general
• ICS: 29.060.20 - Cables
• Technical Committee: TC 20 - Electric cables
• Drafting Committee: WG 18 - TC 20/WG 18
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 28-Mar-2018

Relations

• Revised: IEC 60331-2:2018 - 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
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60331-2 ®
Edition 1.0 2009-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
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
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IEC 60331-2 ®
Edition 1.0 2009-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
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
PRICE CODE
INTERNATIONALE
T
CODE PRIX
ICS 13.220.40; 29.020; 29.060.20 ISBN 978-2-88910-125-2
– 2 – 60331-2 © IEC:2009
CONTENTS
FOREWORD.4

INTRODUCTION.6

1 Scope.7

2 Normative references.7

3 Terms and definitions .7

4 Test conditions – 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 .16
5.7 Fuses .16
6 Test specimen .16
6.1 Test specimen preparation.16
6.2 Test specimen mounting.17
7 Test procedure .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.20
8.1 Flame application time.20
8.2 Acceptance criteria .20
9 Retest procedure .20
10 Test report.20
11 Cable marking .20

Annex A (normative) Verification procedure for the source of heat .21
Annex B (informative) Guidance on the choice of recommended test apparatus .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 using
rotameters .15
Figure 7 – Example of method of mounting a sample for test .17

60331-2 © IEC:2009 – 3 –
Figure 8 – Basic circuit diagram – Electric power and control cables with rated voltage

up to 600/1 000 V.19

Figure A.1 – Temperature measuring arrangement .21

– 4 – 60331-2 © IEC:2009
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
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