Fire hazard testing - Part 9-2: Surface spread of flame - Summary and relevance of test methods

EN-IEC 60695-9-2 presents a summary of published test methods that are used to determine the surface spread of flame of electrotechnical products or materials from which they are formed. It represents the current state of the art of the test methods and, where available, includes special observations on their relevance and use. The list of test methods is not to be considered exhaustive, and test methods that were not developed by IEC TC89 are not to be considered as endorsed by IEC TC89 unless this is specifically stated. This summary cannot be used in place of published standards which are the only valid reference documents. This basic safety publication is intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51. One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. The requirements, test methods or test conditions of this basic safety publication will not apply unless specifically referred to or included in the relevant publications.

Prüfungen zur Beurteilung der Brandgefahr - Teil 9-2: Flammenausbreitung auf Oberflächen - Zusammenfassung und Anwendbarkeit der Prüfverfahren

Essais relatifs aux risques du feu - Partie 9-2: Propagation des flammes en surface - Résumé et pertinence des méthodes d'essai

L'IEC 60695-9-2:2014 propose un résumé des normes d'essais publiées utilisées pour déterminer la propagation de flammes en surface des produits électrotechniques ou des matériaux dont ils sont constitués. Elle représente l'état actuel de l'art des méthodes d'essai et, le cas échéant, elle comprend des observations particulières sur leur pertinence et leur utilisation. La liste des méthodes d'essai ne doit pas être considérée comme exhaustive, et les méthodes d'essai qui n'ayant pas été élaborées par le CE 89 de la CEI ne doivent pas être considérées comme étant entérinées par le CE 89 de la CEI, sauf si cela est spécifiquement stipulé. Ce résumé ne peut pas se substituer aux normes publiées, qui sont les seuls documents de référence valables. Elle a le statut d'une publication fondamentale de sécurité, conformément au Guide CEI 104 et au Guide ISO/CEI 51. Mots-clés: risques du feu, propagation en surface, flammes

Preskušanje požarne ogroženosti - 9-2. del: Površinsko širjenje plamena - Pregled in primernost preskusnih metod (IEC 60695-9-2:2014)

Standard EN-IEC 60695-9-2 predstavlja pregled objavljenih preskusnih metod, ki se uporabljajo za določevanje širjenja plamena po površini za elektrotehnične proizvode ali materiale, iz katerih so izdelani. Predstavlja trenutno najbolj izpopolnjene testne metode in vsebuje dodatna opažanja glede njihove primernosti in uporabe, če so na voljo. Seznam preskusnih metod ni popoln in preskusnih metod, ki jih ni razvil IEC T89, slednji ne podpira, razen če je navedeno drugače. Ta pregled se ne sme uporabljati namesto objavljenih standardov, ki so edini veljavni referenčni dokumenti. Ta osnovna varnostna publikacija je namenjena tehničnim odborom za pripravo standardov v skladu z načeli vodil IEC Guide 104 in ISO/IEC Guide 51. Ena od odgovornosti tehničnih odborov je, da med pripravo publikacij uporabljajo osnovne varnostne publikacije, kadar je to primerno. Zahteve, preskusne metode ali preskusni pogoji iz te osnovne varnostne publikacije se ne uporabljajo, razen če so izrecno navedeni ali zajeti v ustrezne publikacije.

General Information

Status
Published
Publication Date
18-May-2014
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
05-May-2014
Due Date
10-Jul-2014
Completion Date
19-May-2014

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SLOVENSKI STANDARD
SIST EN 60695-9-2:2014
01-junij-2014

Preskušanje požarne ogroženosti - 9-2. del: Površinsko širjenje plamena - Pregled

in primernost preskusnih metod (IEC 60695-9-2:2014)

Fire hazard testing - Part 9-2: Surface spread of flame - Summary and relevance of test

methods

Essais relatifs aux risques du feu - Partie 9-2: Propagation des flammes en surface -

Résumé et pertinence des méthodes d'essai
Ta slovenski standard je istoveten z: EN 60695-9-2:2014
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
29.020 Elektrotehnika na splošno Electrical engineering in
general
SIST EN 60695-9-2:2014 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 60695-9-2:2014
---------------------- Page: 2 ----------------------
SIST EN 60695-9-2:2014
EUROPEAN STANDARD
EN 60695-9-2
NORME EUROPÉENNE
April 2014
EUROPÄISCHE NORM
ICS 13.220.40; 29.020
English version
Fire hazard testing -
Part 9-2: Surface spread of flame -
Summary and relevance of test methods
(IEC 60695-9-2:2014)
Essais relatifs aux risques du feu - Prüfungen zur Beurteilung der
Partie 9-2: Propagation des flammes Brandgefahr -
en surface - Teil 9-2: Flammenausbreitung auf
Résumé et pertinence des méthodes Oberflächen -
d'essai Zusammenfassung und Anwendbarkeit
(CEI 60695-9-2:2014) der Prüfverfahren
(IEC 60695-9-2:2014)

This European Standard was approved by CENELEC on 2014-04-10. CENELEC members are bound to comply

with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard

the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CENELEC member into its own language and notified

to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,

the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,

Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,

Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2014 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60695-9-2:2014 E
---------------------- Page: 3 ----------------------
SIST EN 60695-9-2:2014
EN 60695-9-2:2014 - 2 -
Foreword

The text of document 89/1202/FDIS, future edition 1 of IEC 60695-9-2, prepared by IEC/TC 89 "Fire

hazard testing" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as

EN 60695-9-2:2014.
The following dates are fixed:
(dop) 2015-01-10
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2017-04-10
standards conflicting with the
document have to be withdrawn
This standard is to be used in conjunction with EN 60695-9-1.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such

patent rights.
Endorsement notice

The text of the International Standard IEC 60695-9-2:2014 was approved by CENELEC as a

European Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60695-11-10 NOTE Harmonized as EN 60695-11-10.
IEC 60695-11-20 NOTE Harmonized as EN 60695-11-20.
IEC 60332-1-1 NOTE Harmonized as EN 60332-1-1.
IEC 60332-1-2 NOTE Harmonized as EN 60332-1-2.
IEC 60332-1-3 NOTE Harmonized as EN 60332-1-3.
IEC 60332-2-1 NOTE Harmonized as EN 60332-2-1.
IEC 60332-2-2 NOTE Harmonized as EN 60332-2-2.
IEC 60332-3-10 NOTE Harmonized as EN 60332-3-10.
IEC 60332-3-21 NOTE Harmonized as EN 60332-3-21.
IEC 60332-3-22 NOTE Harmonized as EN 60332-3-22.
IEC 60332-3-23 NOTE Harmonized as EN 60332-3-23.
IEC 60332-3-24 NOTE Harmonized as EN 60332-3-24.
IEC 60332-3-25 NOTE Harmonized as EN 60332-3-25.
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SIST EN 60695-9-2:2014
- 3 - EN 60695-9-2:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
IEC 60695-4 - Fire hazard testing - EN 60695-4 -
Part 4: Terminology concerning fire tests
for electrotechnical products
IEC 60695-9-1 - Fire hazard testing - EN 60695-9-1 -
Part 9-1: Surface spread of flame - General
guidance
IEC Guide 104 - The preparation of safety publications and - -
the use of basic safety publications and
group safety publications
ISO/IEC Guide 51 - Safety aspects - Guidelines for their - -
inclusion in standards
ISO 13943 2008 Fire safety - Vocabulary EN ISO 13943 2010
---------------------- Page: 5 ----------------------
SIST EN 60695-9-2:2014
---------------------- Page: 6 ----------------------
SIST EN 60695-9-2:2014
IEC 60695-9-2
Edition 1.0 2014-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 9-2: Surface spread of flame – Summary and relevance of test methods
Essais relatifs aux risques du feu –
Partie 9-2: Propagation des flammes en surface – Résumé et pertinence des
méthodes d'essai
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 13.220.40, 29.020 ISBN 978-2-8322-1386-5

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 60695-9-2:2014
– 2 – IEC 60695-9-2:2014 © IEC:2014
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 7

4 Summary of published test methods .............................................................................. 11

4.1 Small-scale and intermediate-scale burning tests ............................................. 11

4.1.1 Horizontal and vertical 50 W and 500 W flame tests –

IEC 60695-11-10 and IEC 60695-11-20 .......................................... 11

4.1.2 Vertical burning test for cables – IEC 60332-1 [3] ........................... 12

4.1.3 Vertical burning test for cables – IEC 60332-2 [4] ........................... 13

4.1.4 Lateral flame spread on building and transport products –

ISO 5658-2 [5] ................................................................................ 13

4.1.5 Intermediate scale test of vertical flame spread – ISO 5658-4

[8] ................................................................................................... 14

4.1.6 Fire propagation apparatus, ISO 12136 [9] ..................................... 15

4.1.7 Vertical burning test for aircraft materials – FAR 25 [19] ................. 16

4.1.8 Horizontal burning rate for road vehicle materials – ISO 3795

[20]. ................................................................................................ 17

4.2 Large-scale burning tests ................................................................................. 17

4.2.1 General .......................................................................................... 17

4.2.2 Vertical burning tests for cables (ladder tests) ................................ 17

4.2.3 Vertical burning test for cables – NF C 32-070 [40] ......................... 18

4.2.4 Vertical burning test for riser cables – UL 1666 [41] ........................ 23

4.2.5 Horizontal flame spread test for cables – EN 50289-4-11 and

NFPA 262 ....................................................................................... 23

Annex A (informative) Repeatability and reproducibility data – ISO 5658-2 .......................... 25

Annex B (informative) Repeatability and reproducibility data – ISO 5658-4 .......................... 26

Annex C (informative) Repeatability and reproducibility data – NFPA 262 ............................ 27

Bibliography .......................................................................................................................... 28

Table 1 – Summary and comparison of IEC 60332 vertical ladder test methods [21] ........ 19

Table 2 – Summary and comparison of non-IEC vertical ladder test methods ........................ 21

Table A.1 – Interlaboratory test data for ISO 5658-2 ............................................................. 25

Table B.1 – Reproducibility and repeatability data for ISO 5658-4 ......................................... 26

Table C.1 – Repeatability and reproducibility data for NFPA 262 .......................................... 27

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SIST EN 60695-9-2:2014
IEC 60695-9-2:2014 © IEC:2014 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 9-2: Surface spread of flame –
Summary and relevance of test methods
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60695-9-2 has been prepared by IEC technical committee 89: Fire

hazard testing.

It has the status of a basic safety publication in accordance with IEC Guide 104 and

ISO/IEC Guide 51.

This first edition cancels and replaces the second edition of IEC TS 60695-9-2 published in

2005. This edition constitutes a technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
89/1202/FDIS 89/1209/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.
---------------------- Page: 9 ----------------------
SIST EN 60695-9-2:2014
– 4 – IEC 60695-9-2:2014 © IEC:2014

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all the parts in the 60695 series, under the general title Fire hazard testing, can be

found on the IEC web site.
This International standard is to be used in conjunction with IEC 60695-9-1.

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.
---------------------- Page: 10 ----------------------
SIST EN 60695-9-2:2014
IEC 60695-9-2:2014 © IEC:2014 – 5 –
INTRODUCTION

The risk of fire needs to be considered in any electrical circuit. The objective of component,

circuit and equipment design, as well as the choice of materials, is to reduce the likelihood of

fire, even in the event of foreseeable abnormal use, malfunction or failure.

Electrotechnical products, primarily as victims of fire, may nevertheless contribute to the fire.

Fire hazard increases as the burning area increases, leading in some cases to flashover and

a fully developed fire. This is a typical fire scenario in buildings. It is therefore useful to

measure the rate and extent of the surface spread of flame.

This part of IEC 60695-9 describes surface spread of flame test methods in common use to

assess electrotechnical products or materials used in electrotechnical products. It forms part

of the IEC 60695-9 series which gives guidance to product committees wishing to incorporate

test methods for surface spread of flame in product standards.
IEC 60695-9 consists of the following parts:
– Part 9-1: Surface spread of flame – General guidance
– Part 9-2: Surface spread of flame – Summary and relevance of test methods.
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SIST EN 60695-9-2:2014
– 6 – IEC 60695-9-2:2014 © IEC:2014
FIRE HAZARD TESTING –
Part 9-2: Surface spread of flame –
Summary and relevance of test methods
1 Scope

This part of IEC 60695 presents a summary of published test methods that are used to

determine the surface spread of flame of electrotechnical products or materials from which

they are formed.

It represents the current state of the art of the test methods and, where available, includes

special observations on their relevance and use.

The list of test methods is not to be considered exhaustive, and test methods that were not

developed by IEC TC89 are not to be considered as endorsed by IEC TC89 unless this is

specifically stated.

This summary cannot be used in place of published standards which are the only valid

reference documents.

This basic safety publication is intended for use by technical committees in the preparation of

standards in accordance with the principles laid down in IEC Guide 104 and
ISO/IEC Guide 51.

One of the responsibilities of a technical committee is, wherever applicable, to make use of

basic safety publications in the preparation of its publications. The requirements, test

methods or test conditions of this basic safety publication will not apply unless specifically

referred to or included in the relevant publications.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. 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 for
electrotechnical products

IEC 60695-9-1, Fire hazard testing – Part 9-1: Surface spread of flame – General guidance

IEC Guide 104, The preparation of safety publications and the use of basic safety publications

and group safety publications
ISO/IEC Guide 51, Safety aspects – Guidelines for their inclusion in standards
ISO 13943:2008, Fire Safety – Vocabulary
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SIST EN 60695-9-2:2014
IEC 60695-9-2:2014 © IEC:2014 – 7 –
3 Terms and definitions
For the purposes of this document, terms and definitions given in ISO 13943 and

IEC 60695-4, some of which are reproduced below for the user’s convenience, as well as the

following additional definitions, apply:
3.1
burned length
maximum extent in a specified direction of the burned area
Note 1 to entry: The typical units are metres (m).
cf. damaged length (3.6)
[SOURCE: ISO 13943: 2008, definition 4.31]
3.2
char, noun

carbonaceous residue resulting from pyrolysis (3.26) or incomplete combustion (3.5)

[SOURCE: ISO 13943: 2008, definition 4.38]
3.3
char length
length of charred area
cf. burned length (3.1) and damaged length (3.6)

Note 1 to entry: In some standards, char length is defined by a specific test method.

[SOURCE: ISO 13943: 2008, definition 4.40]
3.4
combustible, noun
item capable of combustion (3.5)
[SOURCE: ISO 13943: 2008, definition 4.44]
3.5
combustion
exothermic reaction of a substance with an oxidizing agent

Note 1 to entry: Combustion generally emits fire effluent accompanied by flames (3.14) and/or glowing.

[SOURCE: ISO 13943: 2008, definition 4.46]
3.6
damaged length
maximum extent in a specified direction of the damaged area
cf. char length (3.3) and burned length (3.1)
[SOURCE: ISO 13943: 2008, definition 4.60]
3.7
extent of combustion
〈electrotechnical〉 maximum length of a test specimen that has been destroyed by

combustion (3.5) or pyrolysis (3.26), under specified test conditions, excluding any region

damaged only by deformation
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SIST EN 60695-9-2:2014
– 8 – IEC 60695-9-2:2014 © IEC:2014
[SOURCE: ISO 13943: 2008, definition 4.91]
3.8
fire

〈general〉 process of combustion (3.5) characterized by the emission of heat and fire effluent

and usually accompanied by smoke, flame (3.14), glowing or a combination thereof

Note 1 to entry: In the English language the term “fire” is used to designate three concepts, two of which, fire

(3.9) and fire (3.10), relate to specific types of self-supporting combustion with different meanings and two of them

are designated using two different terms in both French and German.
[SOURCE: ISO 13943: 2008, definition 4.96]
3.9
fire

〈controlled〉 self-supporting combustion (3.5) that has been deliberately arranged to provide

useful effects and is limited in its extent in time and space
[SOURCE: ISO 13943: 2008, definition 4.97]
3.10
fire

〈uncontrolled〉 self-supporting combustion (3.5) that has not been deliberately arranged to

provide useful effects and is not limited in its extent in time and space
[SOURCE: ISO 13943: 2008, definition 4.98]
3.11
fire hazard

physical object or condition with a potential for an undesirable consequence from fire (3.10)

[SOURCE: ISO 13943: 2008, definition 4.112]
3.12
fire retardant, noun

substance added, or a treatment applied, to a material in order to delay ignition (3.22) or to

reduce the rate of combustion (3.5)

[SOURCE: ISO 13943: 2008, definition 4.123, modified by deletion of “cf. flame retardant”]

3.13
fire scenario

qualitative description of the course of a fire (3.10) with respect to time, identifying key events

that characterise the studied fire and differentiate it from other possible fires

Note 1 to entry: It typically defines the ignition (3.22) and fire growth processes, the fully developed fire (3.20)

stage, the fire decay stage, and the environment and systems that impact on the course of the fire.

[SOURCE: ISO 13943: 2008, definition 4.129]
3.14
flame, noun

zone in which there is rapid, self-sustaining, sub-sonic propagation of combustion (3.5) in a

gaseous medium, usually with emission of light

[SOURCE: ISO 13943: 2008, definition 4.133 – modified by the addition of “zone in which

there is”]
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SIST EN 60695-9-2:2014
IEC 60695-9-2:2014 © IEC:2014 – 9 –
3.15
flame front

boundary of flaming combustion (3.5) at the surface of a material or propagating through a

gaseous mixture
[SOURCE: ISO 13943: 2008, definition 4,136]
3.16
flame retardant, noun

substance added, or a treatment applied, to a material in order to suppress or delay the

appearance of a flame (3.14) and/or reduce the flame-spread rate (3.18)

Note 1 to entry: The use of (a) flame retardant(s) does not necessarily suppress fire (3.8) or terminate

combustion (3.5)..
[SOURCE: ISO 13943: 2008, definition 4.139]
3.17
flame spread
propagation of a flame front (3.15)
[SOURCE: ISO 13943: 2008, definition 4.142]
3.18
flame-spread rate
burning rate (deprecated)
rate of burning (deprecated)

distance travelled by a flame front (3.15) during its propagation, divided by the time of travel,

under specified conditions
[SOURCE: ISO 13943: 2008, definition 4.143]
3.19
flashover

〈stage of fire〉 transition to a state of total surface involvement in a fire (3.10) of combustible

materials within an enclosure
[SOURCE: ISO 13943: 2008, definition 4.156]
3.20
fully developed fire
state of total involvement of combustible materials in a fire (3.8)
[SOURCE: ISO 13943: 2008, definition 4.164]
3.21
heat release rate
burning rate (deprecated)
rate of burning (deprecated)
rate of thermal energy production generated by combustion ()
Note 1 to entry: The typical units are watts (W).
[SOURCE: ISO 13943: 2008, definition 4.177]
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SIST EN 60695-9-2:2014
– 10 – IEC 60695-9-2:2014 © IEC:2014
3.22
ignition
sustained ignition (deprecated)
〈general〉 initiation of combustion (3.5)
[SOURCE: ISO 13943: 2008, definition 4.188]
3.23
ignition source
source of energy that initiates combustion (3.5)
[SOURCE: ISO 13943: 2008, definition 4.189]
3.24
large-scale fire test

fire test that cannot be carried out in a typical laboratory chamber, performed on a test

specimen of large dimensions

Note 1 to entry: A fire test performed on a test specimen of which the maximum dimension is greater than 3 m is

usually called a large-scale fire test.
[SOURCE: ISO 13943: 2008, definition 4.205]
3.25
minimum ignition temperature
ignition point

minimum temperature at which sustained combustion (3.5) can be initiated under specified

test conditions

Note 1 to entry: The minimum ignition temperature implies the application of a thermal stress for an infinite length

of time.
Note 2 to entry: The typical units are degrees Celsius (°C).
[SOURCE: ISO 13943: 2008, definition 4.231]
3.26
pyrolysis
chemical decomposition of a substance by the action of heat

Note 1 to entry: Pyrolysis is often used to refer to a stage of fire (3.8) before flaming combustion (3.5) has

begun.

Note 2 to entry: In fire science, no assumption is made about the presence or absence of oxygen.

[SOURCE: ISO 13943: 2008, definition 4.266]
3.27
pyrolysis front

boundary between the region of pyrolysis (3.26) and the region of unaffected material at the

surface of the material
[SOURCE: ISO 13943: 2008, definition 4.267]
3.28
real-scale fire test

fire test that simulates a given application, taking into account the real scale, the real way the

item is installed and used, and the environment
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IEC 60695-9-2:2014 © IEC:2014 – 11 –

Note 1 to entry: Such a fire test normally assumes that the products are used in accordance with the conditions

laid down by the specifier and/or in accordance with normal practice.
[SOURCE: ISO 13943: 2008, definition 4.273]
3.29
riser cable
cable that runs vertically between floors in a building
Note 1 to entry: This is a term used predominantly in North America
3.30
riser shaft
shaft provided to run services between floors in a building
Note 1 to entry: This is a term used predominantly in North America
3.31
small-scale fire test
fire test performed on a test specimen of small dimensions

Note 1 to entry: A fire test performed on a test specimen of which the maximum dimension is less than 1 m is

usually called a small-scale fire test.
[SOURCE: ISO 13943: 2008, definition 4.292]
3.32
surface spread of flame

flame spread (3.17) away from the source of ignition (3.22) across the surface of a liquid or

a solid
[SOURCE: ISO 13943: 2008, definition 4.317]
4 Summary of published test methods
4.1 Small-scale and intermediate-scale burning tests
4.1.1 Horizontal and vertical 50 W and 500 W flame tests – IEC 60695-11-10 and
IEC 60695-11-20
4.1.1.1 General

IEC 60695-11-10 [1] is a test using a 50 W flame. IEC 60695-11-20 [2] is a test using a

500 W flame.
4.1.1.2 Purpose and principle

These tests refer to solid electrical insulating materials and are intended to serve as a

preliminary indication of their behaviour when exposed to an ignition source. The results make

it possible to check the constancy of the characteristics of a material and provide an

indication of the progress in the development of the flame retardancy of insulating materials.

The results also provide a relative comparison and classification of insulating materials.

4.1.1.3 Test specimen

The relatively small test specimen is 125 mm long, 13 mm wide, and up to 13 mm thick.

___________
Numbers in square brackets refer to the bibliography.
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4.1.1.4 Test method

These tests involve the application of an ignition source to a horizontal or vertical test

specimen and the evaluation of the linear burning rate (HB classification) and the vertical

spread of flame (V classification).
4.1.1.5 Repeatability and reproducibility

Data are available in IEC 60695-11-10 [1] Annexes A and B, and IEC 60695-11-20 [2],

Annex A.
4.1.1.6 Relevance of test data

These test methods are used to evaluate materials. The test methods provide classifications

that may be used for quality assurance, the preselection of component materials of products,

or to verify the required minimum flammability classification of materials used in end products.

The tests are not valid for determining the fire behaviour and fire hazard of complete items of

equipment, since the dimensions of the insulating systems, the design and heat transfer to

adjacent metallic parts, greatly influence the flammability of the electr
...

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