IEC 60332-3-10:2000
(Main)Tests on electric cables under fire conditions - Part 3-10: Test for vertical flame spread of vertically-mounted bunched wires or cables - Apparatus
Tests on electric cables under fire conditions - Part 3-10: Test for vertical flame spread of vertically-mounted bunched wires or cables - Apparatus
IEC 60332-3-10:2000 Specifies method of test for the assessment of vertical flame spread of vertically-mounted bunched wires or cables, electrical or optical, under defined conditions. Gives details of the apparatus and its arrangement and calibration. It has the status of a horizontal standard in accordance with IEC Guide 104.
Essais des câbles électriques soumis au feu - Partie 3-10: Essai de propagation verticale de la flamme des fils ou câbles en nappes en position verticale - Appareillage
IEC 60332-3-10:2000 Spécifie méthode d'essai pour l'évaluation de la propagation verticale de la flamme des fils ou câbles, électriques ou optiques, disposés en nappes en position verticale, dans des conditions définies. Précise l'appareillage ainsi que sa disposition et son étalonnage. Elle a le statut de norme horizontale conformément au IEC Guide 104.
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Standards Content (Sample)
NORME CEI
INTERNATIONALE IEC
60332-3-10
INTERNATIONAL
Première édition
STANDARD
First edition
2000-10
PUBLICATION GROUPÉE DE SÉCURITÉ
GROUP SAFETY PUBLICATION
Essais des câbles électriques soumis au feu –
Partie 3-10:
Essai de propagation verticale de la flamme des
fils ou câbles en nappes en position verticale –
Appareillage
Tests on electric cables under fire conditions –
Part 3-10:
Test for vertical flame spread of vertically-mounted
bunched wires or cables – Apparatus
Numéro de référence
Reference number
CEI/IEC 60332-3-10:2000
Numérotation des publications Publication numbering
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devient la CEI 60034-1. example, IEC 34-1 is now referred to as IEC 60034-1.
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NORME CEI
INTERNATIONALE IEC
60332-3-10
INTERNATIONAL
Première édition
STANDARD
First edition
2000-10
PUBLICATION GROUPÉE DE SÉCURITÉ
GROUP SAFETY PUBLICATION
Essais des câbles électriques soumis au feu –
Partie 3-10:
Essai de propagation verticale de la flamme des
fils ou câbles en nappes en position verticale –
Appareillage
Tests on electric cables under fire conditions –
Part 3-10:
Test for vertical flame spread of vertically-mounted
bunched wires or cables – Apparatus
IEC 2000 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
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CODE PRIX
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Pour prix, voir catalogue en vigueur
For price, see current catalogue
– 2 – 60332-3-10 © CEI:2000
SOMMAIRE
Pages
AVANT-PROPOS . 4
INTRODUCTION .8
Articles
1 Domaine d'application . 10
2 Références normatives. 10
3 Définitions. 10
4 Environnement de l'essai. 10
5 Appareillage d'essai . 12
5.1 Chambre d'essai . 12
5.2 Arrivée d'air . 12
5.3 Type d'échelles . 12
5.4 Accessoire de lavage des effluents. 12
6 Source d’allumage. 14
6.1 Type . 14
6.2 Positionnement . 16
Annexe A (informative) Détails du brûleur recommandé . 32
Annexe B (informative) Facteurs de correction de l'étalonnage du débitmètre à flotteur . 34
Figure 1 – Chambre d'essai . 18
Figure 2 – Isolation thermique de l'arrière et des côtés de la chambre d'essai . 20
Figure 3 – Positionnement du brûleur et disposition type des échantillons sur l'échelle . 22
Figure 4 – Echelles en tubes d’acier pour l'essai de câbles . 24
Figure 5 – Configurations du brûleur . 26
Figure 6 – Disposition des trous pour les brûleurs . 28
Figure 7 – Exemple type de contrôles de débit de gaz. 30
60332-3-10 © IEC:2000 – 3 –
CONTENTS
Page
FOREWORD . 5
INTRODUCTION .9
Clause
1 Scope . 11
2 Normative references . 11
3 Definitions. 11
4 Test environment . 11
5 Test apparatus . 13
5.1 Test chamber. 13
5.2 Air supply. 13
5.3 Ladder types . 13
5.4 Effluent cleaning attachment . 13
6 Ignition source.15
6.1 Type . 15
6.2 Positioning . 17
Annex A (informative) Details of recommended burner . 33
Annex B (informative) Flowmeter calibration correction factors. 35
Figure 1 – Test chamber. 19
Figure 2 – Thermal insulation of back and sides of the test chamber . 21
Figure 3 – Positioning of burner and typical arrangement of test sample on ladder. 23
Figure 4 – Tubular steel ladders for cable test. 25
Figure 5 – Burner configurations . 27
Figure 6 – Arrangement of holes for burners . 29
Figure 7 – Example of schematic diagram of burner control systems . 31
– 4 – 60332-3-10 © CEI:2000
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
ESSAIS DES CÂBLES ÉLECTRIQUES SOUMIS AU FEU –
Partie 3-10: Essai de propagation verticale de la flamme des fils ou câbles
en nappes en position verticale – Appareillage
AVANT-PROPOS
1) La CEI (Commission Electrotechnique Internationale) est une organisation mondiale de normalisation composée
de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a pour objet de
favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines de
l'électricité et de l'électronique. A cet effet, la CEI, entre autres activités, publie des Normes Internationales.
Leur élaboration est confiée à des comités d'études, aux travaux desquels tout Comité national intéressé par le
sujet traité peut participer. Les organisations internationales, gouvernementales et non gouvernementales, en
liaison avec la CEI, participent également aux travaux. La CEI collabore étroitement avec l'Organisation
Internationale de Normalisation (ISO), selon des conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de la CEI concernant les questions techniques, représentent, dans la mesure
du possible un accord international sur les sujets étudiés, étant donné que les Comités nationaux intéressés
sont représentés dans chaque comité d’études.
3) Les documents produits se présentent sous la forme de recommandations internationales. Ils sont publiés
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façon transparente, dans toute la mesure possible, les Normes internationales de la CEI dans leurs normes
nationales et régionales. Toute divergence entre la norme de la CEI et la norme nationale ou régionale
correspondante doit être indiquée en termes clairs dans cette dernière.
5) La CEI n’a fixé aucune procédure concernant le marquage comme indication d’approbation et sa responsabilité
n’est pas engagée quand un matériel est déclaré conforme à l’une de ses normes.
6) L’attention est attirée sur le fait que certains des éléments de la présente Norme internationale peuvent faire
l’objet de droits de propriété intellectuelle ou de droits analogues. La CEI ne saurait être tenue pour
responsable de ne pas avoir identifié de tels droits de propriété et de ne pas avoir signalé leur existence.
La Norme internationale CEI 60332-3-10 a été préparée par le comité d'études 20 de la CEI:
Câbles électriques.
Elle a le statut d’une publication groupée de sécurité conformément au Guide CEI 104.
La CEI 60332-3-10 fait partie d’une série de publications traitant des essais des câbles
électriques soumis au feu; la série remplace la CEI 60332-3, publiée en 1992. Les parties de la
série sont décrites dans l’introduction.
Toutes les catégories déjà existantes de l’essai ont été retenues et mises à jour. Une nouvelle
catégorie (catégorie D) a été rajoutée afin de satisfaire aux besoins d’essai avec des volumes
de matériaux non métalliques très faibles.
Le texte de cette norme est issu des documents suivants :
FDIS Rapport de vote
20/402/FDIS 20/426/RVD
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à l’approbation de cette norme.
Cette publication a été rédigée selon les Directives ISO/CEI, Partie 3.
60332-3-10 © IEC:2000 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TESTS ON ELECTRIC CABLES UNDER FIRE CONDITIONS –
Part 3-10: Test for vertical flame spread of vertically-mounted
bunched wires or cables – Apparatus
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60332-3-10 has been prepared by IEC technical committee 20:
Electric cables.
It has the status of a group safety publication in accordance with IEC Guide 104.
IEC 60332-3-10 forms one of a series of publications dealing with tests on electric cables under
fire conditions; the series supersedes IEC 60332-3 published in 1992. The parts of the series
are described in the introduction.
All pre-existing categories of test are retained and updated. A new category (category D) has
been added to cater for testing at very low non-metallic volumes.
The text of this standard is based on the following documents:
FDIS Report on voting
20/402/FDIS 20/426/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, Part 3.
– 6 – 60332-3-10 © CEI:2000
Les annexes A et B sont données uniquement à titre d’information.
Le comité a décidé que le contenu de cette publication ne sera pas modifié avant 2008. A cette
date, la publication sera
• reconduite;
• supprimée;
• remplacée par une édition révisée, ou
• amendée.
60332-3-10 © IEC:2000 – 7 –
Annexes A and B are for information only.
The committee has decided that the contents of this publication will remain unchanged until
2008. At this date, the publication will be
reconfirmed;
withdrawn;
replaced by a revised edition, or
amended.
– 8 – 60332-3-10 © CEI:2000
INTRODUCTION
Les parties 1 et 2 de la CEI 60332 spécifient des méthodes d'essai pour caractériser la
propagation de la flamme sur un fil isolé ou un câble seul en position verticale. On ne peut pas
présumer que lorsqu'un fil ou câble satisfait aux prescriptions des parties 1 et 2, des fils ou
câbles similaires disposés en nappe en position verticale se comporteront de la même façon.
Cela est dû au fait que la propagation de la flamme le long d'une nappe de câbles en position
verticale dépend d'un certain nombre de paramètres, tels que
a) le volume des matériaux combustibles exposés au feu et aux flammes qui peuvent être
produites par la combustion des câbles;
b) la configuration géométrique des câbles et leur situation par rapport à leur environnement;
c) la température à laquelle il est possible d'enflammer les gaz émis par les câbles;
d) la quantité de gaz combustible émis par les câbles pour une élévation de température
donnée;
e) le volume d'air passant à travers l'installation des câbles ;
f) la construction des câbles, par exemple armés ou non armés, mono ou multiconducteurs.
Tout ce qui précède présume que les câbles peuvent être enflammés lorsqu'ils sont impliqués
dans un incendie externe.
La partie 3 de la CEI 60332 donne les détails d'un essai où un certain nombre de câbles sont
disposés en nappes pour constituer différentes installations des échantillons. Pour être d’un
usage plus facile et pour différencier les différentes catégories d'essais, les parties sont
désignées comme suit.
Partie 3-10: Appareillage
Partie 3-21: Catégorie A F/R
Partie 3-22: Catégorie A
Partie 3-23: Catégorie B
Partie 3-24: Catégorie C
Partie 3-25: Catégorie D
Les parties 3-21 et au-delà définissent les différentes catégories et les procédures qui s'y
rapportent. Les catégories sont différenciées par la durée de l'essai, le volume de matériaux
non métalliques de l'échantillon d'essai et la méthode de montage de l'échantillon pour l'essai.
Dans toutes les catégories, les câbles ayant au moins un conducteur de section supérieure à
35 mm sont essayés dans une configuration espacée, tandis que les câbles dont les conduc-
teurs sont d'une section inférieure ou égale à 35 mm sont essayés dans une configuration
jointive.
Les catégories ne sont pas nécessairement liées à différents niveaux de sécurité dans les
installations de câbles réelles. La configuration réelle des câbles installés peut être un élément
déterminant majeur dans le niveau de propagation de la flamme survenant dans un incendie
réel.
La méthode de montage décrite dans la catégorie A F/R (partie 3-21) est destinée aux câbles
spéciaux utilisés dans des installations particulières.
Les catégories A, B, C et D (parties 3-22 à 3-25 respectivement) sont pour un usage général là
où des volumes de matériaux non métalliques différents sont impliqués.
Des catégories additionnelles, en particulier destinées à couvrir l'utilisation des câbles de
communication de petit diamètre en configuration de faisceaux jointifs, seront étudiées
ultérieurement, lorsqu'un plus grand nombre de résultats chiffrés sera disponible.
60332-3-10 © IEC:2000 – 9 –
INTRODUCTION
Parts 1 and 2 of IEC 60332 specify methods of test for flame spread characteristics for a single
vertical insulated wire or cable. It cannot be assumed that, because a wire or cable meets the
requirements of parts 1 and 2, a vertical bunch of similar cables or wires will behave in a
similar manner. This is because flame spread along a vertical bunch of cables depends on a
number of features, such as
a) the volume of combustible material exposed to the fire and to any flame which may be
produced by the combustion of the cables;
b) the geometrical configuration of the cables and their relationship to an enclosure;
c) the temperature at which it is possible to ignite the gases emitted from the cables;
d) the quantity of combustible gas released from the cables for a given temperature rise;
e) the volume of air passing through the cable installation;
f) the construction of the cable, for example armoured or unarmoured, multi- or single-core.
All of the foregoing assume that the cables are able to be ignited when involved in an external
fire.
Part 3 of IEC 60332 gives details of a test where a number of cables are bunched together to
form various test sample installations. For easier use and differentiation of various test
categories, the parts are designated as follows:
Part 3-10: Apparatus
Part 3-21: Category A F/R
Part 3-22: Category A
Part 3-23: Category B
Part 3-24: Category C
Part 3-25: Category D
Parts from 3-21 onwards define the various categories and the relevant procedures. The
categories are distinguished by test duration, the volume of non-metallic material of the test
sample and the method of mounting the sample for the test. In all categories, cables having at
least one conductor of cross-sectional area greater than 35 mm are tested in a spaced
configuration, whereas cables of conductor cross-sectional area of 35 mm or smaller are
tested in a touching configuration.
The categories are not necessarily related to different safety levels in actual cable installations.
The actual installed configuration of the cables may be a major determinant in the level of
flame spread occurring in an actual fire.
The method of mounting described in category A F/R (part 3-21) is intended for special cable
designs used in particular installations.
Categories A, B, C and D (parts 3-22 to 3-25 respectively) are for general use where different
non-metallic volumes are applicable.
Additional categories, especially to cover the use of small diameter communication cables in
closely bunched configurations, will be further considered when more data are available.
– 10 – 60332-3-10 © CEI:2000
ESSAIS DES CÂBLES ÉLECTRIQUES SOUMIS AU FEU –
Partie 3-10: Essai de propagation verticale de la flamme des fils ou câbles
en nappes en position verticale – Appareillage
1 Domaine d'application
Les séries de Normes internationales couvertes par les parties 3-10, 3-21, 3-22, 3-23, 3-24 et
3-25 de la CEI 60332 spécifient des méthodes d'essai pour l'évaluation de la propagation
verticale de la flamme des fils ou câbles, électriques ou optiques, disposés en nappes en
position verticale, dans des conditions définies.
NOTE Pour les besoins de la présente norme, le terme « fils ou câbles électriques » couvre tous les câbles isolés
à conducteur métallique utilisés pour le transport d'énergie ou de signaux.
La présente partie de la CEI 60332 précise l'appareillage ainsi que sa disposition et son
étalonnage.
2 Références normatives
Les documents normatifs suivants contiennent des dispositions qui, par suite de la référence
qui y est faite, constituent des dispositions valables pour la présente partie de la CEI 60332.
Pour les références datées, les amendements ultérieurs ou les révisions de ces publications ne
s’appliquent pas. Toutefois, les parties prenantes aux accords fondés sur la présente partie de
la CEI 60332 sont invitées à rechercher la possibilité d’appliquer les éditions les plus récentes
des documents normatifs indiqués ci-après. Pour les références non datées, la dernière édition
du document normatif en référence s’applique. Les membres de la CEI et de l’ISO possèdent
le registre des Normes internationales en vigueur.
CEI 60695-4, Essais relatifs aux risques du feu – Partie 4: Terminologie relative aux essais au
feu
Guide CEI 104, Elaboration des publications de sécurité et utilisation des publications
fondamentales de sécurité et publications groupées de sécurité
3 Définitions
Pour les besoins de la présente partie de la CEI 60332, la définition suivante s'applique. Cette
définition provient de la CEI 60695-4.
3.1
source d'allumage
source d'énergie qui provoque une combustion
4 Environnement de l'essai
L'essai ne doit pas être entrepris si la vitesse du vent à l'extérieur de la cabine, mesurée au
moyen d'un anémomètre fixé au sommet de l'équipement d'essai, est supérieure à 8 m/s ainsi
que lorsque la température des parois internes mesurée en un point situé approximativement à
1 500 mm au-dessus du niveau du plancher, 50 mm d'une paroi latérale et 1 000 mm de la
porte est inférieure à 5 °C ou supérieure à 40 °C. La porte de l'enceinte doit être fermée tout
au long de l'essai.
60332-3-10 © IEC:2000 – 11 –
TESTS ON ELECTRIC CABLES UNDER FIRE CONDITIONS –
Part 3-10: Test for vertical flame spread of vertically-mounted
bunched wires or cables – Apparatus
1 Scope
The series of International Standards covered by Parts 3-10, 3-21, 3-22, 3-23, 3-24 and 3-25 of
IEC 60332 specifies methods of test for the assessment of vertical flame spread of vertically-
mounted bunched wires or cables, electrical or optical, under defined conditions.
NOTE For the purpose of this standard the term “electric wire or cable” covers all insulated metallic conductor
cables used for the conveyance of energy or signals.
This part of IEC 60332 details the apparatus and its arrangement and calibration.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 60332. For dated references, subsequent amendments
to, or revisions of, any of these publications do not apply. However, parties to agreements
based on this part of IEC 60332 are encouraged to investigate the possibility of applying the
most recent editions of the normative documents indicated below. For undated references, the
latest edition of the normative document referred to applies. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 60695-4, Fire hazard testing – Part 4: Terminology concerning fire tests
IEC Guide 104, The preparation of safety publications and the use of basic safety publications
and group safety publications
3 Definitions
For the purpose of this part of IEC 60332 the following definition applies. The definition is taken
from IEC 60695-4.
3.1
ignition source
source of energy that initiates combustion
4 Test environment
The test shall not be carried out if the external wind speed, measured by an anemometer fitted
on the top of the test rig, is greater than 8 m/s and shall not be carried ou
...
IEC 60332-3-10 ®
Edition 1.1 2009-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Tests on electric and optical fibre cables under fire conditions –
Part 3-10: Test for vertical flame spread of vertically-mounted bunched wires or
cables – Apparatus
Essais des câbles électriques et des câbles à fibres optiques soumis au feu –
Partie 3-10: Essai de propagation verticale de la flamme des fils ou câbles
montés en nappes en position verticale – Appareillage
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IEC 60332-3-10 ®
Edition 1.1 2009-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Tests on electric and optical fibre cables under fire conditions –
Part 3-10: Test for vertical flame spread of vertically-mounted bunched wires or
cables – Apparatus
Essais des câbles électriques et des câbles à fibres optiques soumis au feu –
Partie 3-10: Essai de propagation verticale de la flamme des fils ou câbles
montés en nappes en position verticale – Appareillage
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CH
CODE PRIX
ICS 13.220.40; 29.020; 29.060.20 ISBN 978-2-88910-130-6
– 2 – 60332-3-10 © IEC:2000+A1:2008
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references.6
3 Definitions .6
4 Test environment.6
5 Test apparatus .7
5.1 Test chamber .7
5.2 Air supply .7
5.3 Ladder types.7
5.4 Effluent cleaning attachment.7
6 Ignition source .8
6.1 Type.8
6.2 Positioning.9
Annex A (informative) Details of recommended burner .18
Annex B (informative) Flowmeter calibration correction factors .19
Figure 1 – Test chamber .11
Figure 2 – Thermal insulation of back and sides of the test chamber.12
Figure 3 – Positioning of burner and typical arrangement of test sample on ladder .13
Figure 4 – Tubular steel ladders for cable test .14
Figure 5 – Burner configurations.15
Figure 6 – Arrangement of holes for burners.16
Figure 7 – Schematic diagram of an example of a burner control system using rotameters.17
60332-3-10 © IEC:2000+A1:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TESTS ON ELECTRIC AND OPTICAL FIBRE CABLES
UNDER FIRE CONDITIONS –
Part 3-10: Test for vertical flame spread of vertically-mounted bunched
wires or cables – Apparatus
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 60332-3-10 has been prepared by IEC technical committee 20:
Electric cables.
It has the status of a group safety publication in accordance with IEC Guide 104.
IEC 60332-3-10 forms one of a series of publications dealing with tests on electric cables
under fire conditions; the series supersedes IEC 60332-3 published in 1992. The parts of the
series are described in the introduction.
All pre-existing categories of test are retained and updated. A new category (category D) has
been added to cater for testing at very low non-metallic volumes.
– 4 – 60332-3-10 © IEC:2000+A1:2008
This consolidated version of IEC 60332-3-10 consists of the first edition (2000) [documents
20/402/FDIS and 20/426/RVD] and its amendment 1 (2008) [documents 20/933/CDV and
20/982A/RVC].
The technical content is therefore identical to the base edition and its amendment and has
been prepared for user convenience.
It bears the edition number 1.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
Annexes A and B are for information only.
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the maintenance result 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.
60332-3-10 © IEC:2000+A1:2008 – 5 –
INTRODUCTION
Parts 1 and 2 of IEC 60332 specify methods of test for flame spread characteristics for a single
vertical insulated wire or cable. It cannot be assumed that, because a wire or cable meets the
requirements of parts 1 and 2, a vertical bunch of similar cables or wires will behave in a
similar manner. This is because flame spread along a vertical bunch of cables depends on a
number of features, such as
a) the volume of combustible material exposed to the fire and to any flame which may be
produced by the combustion of the cables;
b) the geometrical configuration of the cables and their relationship to an enclosure;
c) the temperature at which it is possible to ignite the gases emitted from the cables;
d) the quantity of combustible gas released from the cables for a given temperature rise;
e) the volume of air passing through the cable installation;
f) the construction of the cable, for example armoured or unarmoured, multi- or single-core.
All of the foregoing assume that the cables are able to be ignited when involved in an external
fire.
Part 3 of IEC 60332 gives details of a test where a number of cables are bunched together to
form various test sample installations. For easier use and differentiation of various test
categories, the parts are designated as follows:
Part 3-10: Apparatus
Part 3-21: Category A F/R
Part 3-22: Category A
Part 3-23: Category B
Part 3-24: Category C
Part 3-25: Category D
Parts from 3-21 onwards define the various categories and the relevant procedures. The
categories are distinguished by test duration, the volume of non-metallic material of the test
sample and the method of mounting the sample for the test. In all categories, cables having at
are tested in a spaced
least one conductor of cross-sectional area greater than 35 mm
configuration, whereas cables of conductor cross-sectional area of 35 mm or smaller are
tested in a touching configuration.
The categories are not necessarily related to different safety levels in actual cable installations.
The actual installed configuration of the cables may be a major determinant in the level of
flame spread occurring in an actual fire.
The method of mounting described in category A F/R (part 3-21) is intended for special cable
designs used in particular installations.
Categories A, B, C and D (parts 3-22 to 3-25 respectively) are for general use where different
non-metallic volumes are applicable.
– 6 – 60332-3-10 © IEC:2000+A1:2008
TESTS ON ELECTRIC AND OPTICAL FIBRE CABLES
UNDER FIRE CONDITIONS –
Part 3-10: Test for vertical flame spread of vertically-mounted bunched
wires or cables – Apparatus
1 Scope
The series of International Standards covered by Parts 3-10, 3-21, 3-22, 3-23, 3-24 and 3-25 of
IEC 60332 specifies methods of test for the assessment of vertical flame spread of vertically-
mounted bunched wires or cables, electrical or optical, under defined conditions.
NOTE For the purpose of this standard the term “electric wire or cable” covers all insulated metallic conductor
cables used for the conveyance of energy or signals.
This part of IEC 60332 details the apparatus and its arrangement and calibration.
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 60695-4, Fire hazard testing – Part 4: Terminology concerning fire tests
IEC Guide 104, The preparation of safety publications and the use of basic safety publications
and group safety publications
3 Definitions
For the purpose of this part of IEC 60332 the following definition applies. The definition is taken
from IEC 60695-4.
3.1
ignition source
source of energy that initiates combustion
4 Test environment
The test shall not be carried out if the external wind speed, measured by an anemometer fitted
on the top of the test rig, is greater than 8 m/s and shall not be carried out if the temperature of
the inside walls is below 5 °C or above 40 °C measured at a point approximately 1 500 mm
above floor level, 50 mm from a side wall, and 1 000 mm from the door. The enclosure door
shall be closed throughout the test.
60332-3-10 © IEC:2000+A1:2008 – 7 –
5 Test apparatus
The test apparatus consists of the following:
5.1 Test chamber
The test rig (see Figures 1a and 1b) shall comprise a vertical test chamber having a width of
(1 000 ± 100) mm, a depth of (2 000 ± 100) mm and a height of (4 000 ± 100) mm; the floor of
the chamber shall be raised above ground level. The test chamber shall be nominally airtight
along its sides, air being admitted at the base of the test chamber through an aperture of
(800 ± 20) mm × (400 ± 10) mm situated (150 ± 10) mm from the front wall of the test chamber
(see figure 1).
An outlet (300 ± 30) mm x (1 000 ± 100) mm shall be made at the rear edge of the top of the
test chamber. The back and sides of the test chamber shall be thermally insulated to give a
–2 –1
coefficient of heat transfer of approximately 0,7 W·m ·K . For example, a steel plate 1,5 mm
to 2,0 mm thick covered with 65 mm of mineral wool with a suitable external cladding is
satisfactory (see figure 2). The distance between the ladder and the rear wall of the chamber is
(150 ± 10) mm, and between the bottom rung of the ladder and the floor (400 ± 5) mm. The
clearance between the lowest point of the test piece and the floor is approximately 100 mm
(see figure 3).
5.2 Air supply
A means of supplying a controlled air flow through the chamber shall be fitted.
Air shall be introduced into the test chamber through a box fitted directly underneath, and of
approximately the same dimensions as, the air inlet aperture. Air shall be blown into the box
from a suitable fan through a straight section of duct which shall enter from the rear of the test
chamber and be parallel to the floor and along the burner centre line as shown in Figure 1b.
The duct shall be arranged to allow air into the box through an opening in the longest side.
NOTE 1 A grille may be placed over the air inlet aperture to facilitate accessing the test chamber but should
neither restrict the airflow nor modify its direction.
NOTE 2 A duct of constant cross-section of approximately 240 cm and minimum length of 60 cm is
recommended.
Prior to burner ignition, the air flow shall be adjusted to a rate of (5 000 ± 500) l/min at a
constant controlled temperature of (20 ± 10) °C and at atmospheric pressure and measured at
the inlet side before the test commences. This air flow rate shall be maintained throughout the
test until cable burning or glowing has ceased or for a maximum time of 1 h from completion of
the test flame application period, after which period the flame or glowing shall be extinguished.
NOTE 3 In order to remove noxious gases, it is recommended to maintain the air flow for some minutes after the
end of the test, before entering the test chamber.
5.3 Ladder types
There are two types of tubular steel ladder: a standard ladder of (500 ± 5) mm width and a wide
ladder of (800 ± 10) mm width. Details of the types of ladder are given in figures 4a and 4b.
5.4 Effluent cleaning attachment
Legal requirements may make it necessary for equipment for collecting and washing the
effluent to be fitted to the test chamber. This equipment shall not cause a change in the air flow
rate through the test chamber.
– 8 – 60332-3-10 © IEC:2000+A1:2008
6 Ignition source
6.1 Type
As required by the test procedure the ignition source shall be one or two ribbon-type propane
gas burners complete with venturi mixer, and their own set of flowmeters. The propane gas
shall be technical grade propane of nominal 95 % purity. The flame-producing surface of the
burner(s) shall consist of a flat metal plate through which 242 holes of 1,32 mm in diameter are
drilled on 3,2 mm centres in three staggered rows of 81, 80 and 81 holes each to form an array
having the nominal dimensions 257 mm × 4,5 mm. As the burner plate may be drilled without
the use of a drilling jig, the spacing of the holes may vary slightly. Additionally, a row of small
holes may be milled on each side of the burner plate to serve as pilot holes with the function of
keeping the flame burning.
The burners are shown in figures 5a and 5b, and the placement of the holes in figure 6.
NOTE 1 To ensure reproducibility between results from different testing stations, a burner, which is readily
available, is recommended for use. For details, see annex A.
Each burner shall be individually fitted with an accurate means of controlling the propane gas
and air input flow rates, either by means of a rotameter-type flowmeter or mass flowmeter.
NOTE 2 Mass flowmeters are recommended for ease of use.
Figure 7 shows an example of a rotameter-type system.
SAFETY NOTE – The following precautions are recommended to ensure safe operation of the
ignition source:
– the gas supply system should be equipped with flashback arresters;
– a flame failure protection device should be used;
– safe sequencing of the propane and air supply should be employed during ignition and
extinguishing.
The calibration of the propane gas and air rotameter-type flowmeters shall be checked after
installation to ensure that the pipework and venturi mixer have not affected the calibration.
Corrections for the variations in temperature and pressure from that specified on the propane
gas and air rotameter-type flowmeters shall be applied when necessary, see annex B.
Propane gas and air rotameter-type flowmeters shall be calibrated according to the following
reference conditions.
Reference temperature and pressure are 20 °C and 1 bar (100 kPa).
For the purpose of this test, the air shall have a dew-point not higher than 0 °C.
60332-3-10 © IEC:2000+A1:2008 – 9 –
The flow rates for the test shall be as follows:
Air (77,7 ± 4,8) l/min at reference conditions (1 bar and 20 °C) or (1 550 ± 140) mg/s
Propane (13,5 ± 0,5) l/min at reference conditions (1 bar and 20 °C) or ( 442 ± 10) mg/s
6 )
to provide a nominal (73,7 ± 1,68) × 10 J/h ((70 000 ± 1 600) Btu/h).
NOTE 3 A net heat of combustion of 46,4 kJ/g is used to calculate the propane flow rate.
6.2 Positioning
For the test, the burner shall be arranged horizontally at a distance of (75 ± 5) mm from the
front surface of the cable sample, (600 ± 5) mm above the floor of the test chamber and
approximately symmetrical with the axis of the ladder. The point of application of the burner
flame shall lie between two cross-bars on the ladder (see Figure 2 and Figure 3).
Adjustment of air and gas flows prior to the test may be carried out away from the test position.
Where two burners are used in combination with the wide ladder, they shall be arranged so as
to be approximately symmetrical with the axis of the ladder, as shown in figure 5b. The burner
system shall be positioned such that the centre line of the burner system is approximately
coincident with the centre of the ladder.
___________
)
This is also equivalent to (20,5 ± 0,5) kW.
1 000 ± 100
– 10 – 60332-3-10 © IEC:2000+A1:2008
IEC 1851/2000
Key
1 Smoke outlet (300 ± 30) × (1 000 ± 100)
2 Air inlet (800 ± 20) × (400 ± 10)
3 Rig raised above ground level
Dimensions in millimetres
Figure 1a – Test chamber
150 ± 10
150 ± 10
2 000 ± 100
4 000 ± 100
60332-3-10 © IEC:2000+A1:2008 – 11 –
4 3 2
IEC 2350/08
Key
1 door 5 burner
2 air inlet box 6 cables tested
3 air inlet duct 7 ladder
4 fan (illustrative position) 8 smoke outlet
Figure 1b – Schematic side elevation of test chamber and air inlet arrangement
Figure 1 – Test chamber
– 12 – 60332-3-10 © IEC:2000+A1:2008
2 000 ± 100
150 ± 10 400 ± 10 150 ± 10
75 ± 5
IEC 1852/2000
Key
1 Steel plate, 1,5 mm to 2 mm thick
2 Thermal insulation of mineral wool approximately
65 mm thick with suitable external cladding to give
–2 –1
a coefficient of heat transfer of approximately 0,7 W × m × K
Dimensions in millimetres
Figure 2 – Thermal insulation of back and sides of the test chamber
1 000 ± 100
800 ± 20
60332-3-10 © IEC:2000+A1:2008 – 13 –
Dimensions in millimetres
IEC 2351/08
Key
1 round steel rungs
2 metal wire ties
3 centre line of burner
4 floor
5 maximum width (according to test category)
Figure 3 – Positioning of burner and typical arrangement of test sample on ladder
600 ± 5
400 ± 5
∼100
– 14 – 60332-3-10 © IEC:2000+A1:2008
1 1
Ø 33,7 ± 0,5 Ø 33,7 ± 0,5
2 2
500 ± 5 800 ± 10
IEC 1855/2000
IEC 1854/2000
Key
1 Diameter of upright 4 Total height of ladder
2 Number rungs = 9 5 Distance between rungs
3 Diameter of rungs 6 Width
Dimensions in millimetres
Figure 4a – Standard ladder Figure 4b – Wide ladder
Figure 4 – Tubular steel ladders for cable test
3 500 ± 10
Ø 26,9 ± 0,4
407 ± 10
3 500 ± 10
Ø 26,9 ± 0,4
407 ± 10
60332-3-10 © IEC:2000+A1:2008 – 15 –
IEC 1856/2000
Figure 5a – Single burner for use with standard ladder
IEC 1857/2000
Figure 5b — Two burners in combination for use with the wide ladder
Key
1 Venturi air-gas mixer
2 Propane gas entry
3 Compressed air entry
Dimensions in millimetres
Figure 5 – Burner configurations
– 16 – 60332-3-10 © IEC:2000+A1:2008
3,2
IEC 1858/2000
Key
1 242 round holes, 1,32 mm in diameter
on 3,2 mm centres, staggered in three
rows of 81, 80 and 81 holes, centred
on the face of the burner
Dimensions in millimetres (approximate values)
Figure 6 – Arrangement of holes for burners
3,2
4,5
60332-3-10 © IEC:2000+A1:2008 – 17 –
6A
IEC 2352/08
Key
1 regulator 9 flowmeters
2 piezoelectric igniter 10 venturi mixer
3 flame failure device 11 burner
4 control thermocouples 12 ball valve
5 propane cylinder 13 air flow
6 screw valve (6a = alternative position) 14 compressed air cylinder
7 pilot feed 15 screw valve on pilot feed
8 gas flow
Figure 7 – Schematic diagram of an example
of a burner control system using rotameters
– 18 – 60332-3-10 © IEC:2000+A1:2008
Annex A
(informative)
Details of recommended burner
A burner (catalogue number 10L11-55) and venturi mixer (catalogue number 14-18) complying
with the requirements of clause 6 can be obtained from:
Pemfab
PO Box 227
30 Indel avenue
Rancocas, NJ 08073-0227
USA
Tel: +1 800 573 6322
Telefax: +1 609 267 0922
NOTE The information given in this annex, covering named products and their suppliers, is given for the
convenience of users of this International Standard and does not constitute an endorsement by IEC of the product
named. Equivalent products may be used if they can be shown to lead to the same results.
Details of recommended mass flowmeters
Commercially available mass flow meters suitable for use in carrying out tests according to this
standard are supplied by, amongst others
– Brooks Instrument Rosemount
– Kobold Instruments MAS Flow Monitor
60332-3-10 © IEC:2000+A1:2008 – 19 –
Annex B
(informative)
Flowmeter calibration correction factors
B.1 General
When using the rotameter type flowmeters to monitor the supply rate of the gases, two factors
need to be considered in order to use them correctly. It is important
a) to know what the flowmeter is indicating when used under the actual operating conditions;
b) to know under what conditions of temperature and gas pressure the flowmeter was
calibrated, and at what conditions it was designed to operate.
Considering point a), most flowmeters are designed to indicate the volumetric flow rate at
atmospheric temperature and pressure, i.e. 20 °C and 1 bar. However, considering point b), not
all flowmeters are calibrated and designed to work at the same temperature and pressure, and
care should be taken to ensure that the temperature and pressure of the gas flowing through a
flowmeter are correct for that particular meter. Working the flowmeter at temperatures and
pressures different from these conditions requires application of a correction factor such as
provided hereinafter.
B.2 Example
B.2.1 General
Assume that air flow rate of 77,7 l/min at 1 bar and 20 °C is required at the burner.
Flowmeter 1 is calibrated to operate at 2,4 bar absolute and 15 °C, but to indicate l/min at 1 bar
and 15 °C.
Flowmeter 2 is calibrated to operate at 1 bar absolute and 20 °C, but to indicate l/min at 1 bar
and 20 °C.
Assume that the air supply pressure up to and including the flowmeters is alternatively at 1 bar
(see B.2.2) or at 2,4 bar (see B.2.3) and 20 °C.
The calibration correction factor is given as follows:
P T
1 2
C = ×
P T
2 1
where
T is the absolute temperature, in kelvins (K);
P is the absolute pressure, in bars (bar);
P , T are the calibration conditions;
1 1
P , T are the operating conditions.
2 2
– 20 – 60332-3-10 © IEC:2000+A1:2008
B.2.2 Air supplied at 1 bar
Flowmeter 1
This will require a correction factor to be used since the meter is operating in conditions
removed from its designed operating conditions.
P = 2,4 bar T = 15 °C = 288 K
1 1
P = 1 bar T = 20 °C = 293 K
2 2
Substituting these values:
2,4 293
C = × = 1,56
1 288
Thus, to set a flow rate of 77,7 l/min at reference conditions, a reading on this flowmeter of
121,2 l/min (77,7 × 1,56) is required.
Flowmeter 2
Since this meter is operating under its design conditions, the required flow rate of 77,7 l/min
can be read directly from the meter with no correction factor necessary.
B.2.3 Air supplied at 2,4 bar
...
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