SIST EN 60695-1-20:2016

Fire hazard testing - Part 1-20: Guidance for assessing the fire hazard of electrotechnical products - Ignitability - General guidance (IEC 60695-1-20:2016)

This part of IEC 60695 provides guidance on the ignitability of electrotechnical products and
the materials from which they are formed. It gives guidance on:
a) the principles of ignitability;
b) the selection of appropriate test methods, and
c) the use and interpretation of results.
This part of IEC 60695 is intended for use by technical committees in 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 1-20: Anleitung zur Beurteilung der Brandgefahr von elektrotechnischen Erzeugnissen - Entzündbarkeit - Allgemeiner Leitfaden

Essais relatifs aux risques du feu - Partie 1-20: Lignes directrices pour l'évaluation des risques du feu des produits électrotechniques - Allumabilité - Lignes directrices générales

L'IEC 60695-1-20:2016 donne des lignes directrices concernant l'allumabilité des produits électrotechniques et des matériaux dont ils sont constitués. Elle fournit des lignes directrices sur: les principes de l'allumabilité; le choix des méthodes d'essai appropriées, et l'utilisation et l'interprétation des résultats.
Cette première édition de l'IEC 60695-1-20 annule et remplace la première édition de l'IEC TS 60695-1-20 parue en 2008. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- l'ISO 5660-1 a été ajoutée aux références normatives;
- les définitions de "pyrolyse" et de "court-circuit" ont été ajoutées à l'Article 3;
- des parties de l'introduction ont été déplacées vers l'Article 5 et font maintenant partie du texte normatif;
- et l'Article 5 comprend maintenant plusieurs énoncés obligatoires.
La présente partie de l'IEC 60695 est destinée à être utilisée par les comités d'études pour l'établissement de leurs normes conformément aux principes exposés dans le Guide IEC 104 et dans le Guide ISO/IEC 51.
Mots clés: Risque du feu, Méthode d'essai du feu, Ingénierie de la sécurité incendie, Allumabilité

Preskušanje požarne ogroženosti - 1-20. del: Navodilo za ocenjevanje požarne ogroženosti elektrotehničnih izdelkov - Vnetljivost - Splošno navodilo (IEC 60695-1-20:2016)

Ta del standarda IEC 60695 podaja smernice glede vnetljivosti elektrotehničnih izdelkov in
materialov, iz katerih so izdelani. Standard podaja smernice glede:
a) načel vnetljivosti;
b) izbire ustreznih preskusih metod; ter
c) uporabe in interpretacije rezultatov.
Ta del standarda IEC 60695 je namenjen tehničnim odborom za pripravo standardov v skladu z načeli vodil IEC 104 in ISO/IEC 51. Ena od odgovornosti tehničnega odbora je, da pri pripravi publikacij uporablja osnovne varnostne publikacije (kjer 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 ustreznih publikacijah.

General Information

• Status: Published
• Publication Date: 01-Jun-2016
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: I09 - Imaginarni 09
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 11-May-2016
• Due Date: 16-Jul-2016
• Completion Date: 02-Jun-2016
• Ref Project: EN 60695-1-20:2016 - Fire hazard testing - Part 1-20: Guidance for assessing the fire hazard of electrotechnical products - Ignitability - General guidance

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60695-1-20:2016
01-julij-2016
3UHVNXãDQMHSRåDUQHRJURåHQRVWLGHO1DYRGLOR]DRFHQMHYDQMHSRåDUQH
RJURåHQRVWLHOHNWURWHKQLþQLKL]GHONRY9QHWOMLYRVW6SORãQRQDYRGLOR,(&

Fire hazard testing - Part 1-20: Guidance for assessing the fire hazard of electrotechnical
products - Ignitability - General guidance (IEC 60695-1-20:2016)
Essais relatifs aux risques du feu - Partie 1-20: Lignes directrices pour l'évaluation des
risques du feu des produits électrotechniques - Allumabilité - Lignes directrices
générales
Ta slovenski standard je istoveten z: EN 60695-1-20:2016
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 60695-1-20:2016 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60695-1-20:2016

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SIST EN 60695-1-20:2016


EUROPEAN STANDARD EN 60695-1-20

NORME EUROPÉENNE

EUROPÄISCHE NORM
May 2016
ICS 13.220.40; 29.020

English Version
Fire hazard testing -
Part 1-20: Guidance for assessing the fire hazard of
electrotechnical products - Ignitability - General guidance
(IEC 60695-1-20:2016)
Essais relatifs aux risques du feu -  Prüfungen zur Beurteilung der Brandgefahr -
Partie 1-20: Lignes directrices pour l'évaluation des risques Teil 1-20: Anleitung zur Beurteilung der Brandgefahr von
du feu des produits électrotechniques - Allumabilité - Lignes elektrotechnischen Erzeugnissen - Entzündbarkeit -
directrices générales Allgemeiner Leitfaden
(IEC 60695-1-20:2016) (IEC 60695-1-20:2016)
This European Standard was approved by CENELEC on 2016-03-02. 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.


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
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 60695-1-20:2016 E

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SIST EN 60695-1-20:2016
EN 60695-1-20:2016
European foreword
The text of document 89/1296/FDIS, future edition 1 of IEC 60695-1-20:2016, prepared by
IEC/TC 89 "Fire hazard testing" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 60695-1-20:2016.

The following dates are fixed:
(dop) 2016-12-02
• 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) 2019-03-02
standards conflicting with the
document have to be withdrawn

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 60695-1-20:2016 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/TS 62441 NOTE Harmonized as CLC/TS 62441.
IEC 60112 NOTE Harmonized as EN 60112.
IEC 60587 NOTE Harmonized as EN 60587.
IEC 60099-4 NOTE Harmonized as EN 60099-4.
2

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SIST EN 60695-1-20:2016
EN 60695-1-20:2016
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 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu

Publication Year Title EN/HD Year

IEC 60695-1-10 -  Fire hazard testing - EN 60695-1-10 -
Part 1-10: Guidance for assessing the fire
hazard of electrotechnical products -
General guidelines
IEC 60695-1-11 -  Fire hazard testing - EN 60695-1-11 -
Part 1-11: Guidance for assessing the fire
hazard of electrotechnical products - Fire
hazard assessment
IEC 60695-1-12 -  Fire hazard testing - EN 60695-1-12 -
Part 1-12: Guidance for assessing the fire
hazard of electrotechnical products - Fire
safety engineering
IEC/TR 60695-1-21 -  Fire hazard testing - - -
Part 1-21: Guidance for assessing the fire
hazard of electrotechnical products -
Ignitability - Summary and relevance of test
methods
IEC 60695-2-11 -  Fire hazard testing - EN 60695-2-11 -
Part 2-11: Glowing/hot-wire based test
methods - Glow-wire flammability test
method for end-products (GWEPT)
IEC 60695-2-12 -  Fire hazard testing - EN 60695-2-12 -
Part 2-12: Glowing/hot-wire based test
methods - Glow-wire flammability index
(GWFI) test method for materials
IEC 60695-2-13 -  Fire hazard testing - EN 60695-2-13 -
Part 2-13: Glowing/hot-wire based test
methods - Glow-wire ignition temperature
(GWIT) test method for materials
IEC 60695-4 2012 Fire hazard testing - EN 60695-4 2012
Part 4: Terminology concerning fire tests
for electrotechnical products
IEC 60695-11-5 -  Fire hazard testing - EN 60695-11-5 -
Part 11-5: Test flames - Needle-flame test
method - Apparatus, confirmatory test
arrangement and guidance
3

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SIST EN 60695-1-20:2016
EN 60695-1-20:2016
Publication Year Title EN/HD Year

IEC 60695-11-10 -  Fire hazard testing - EN 60695-11-10 -
Part 11-10: Test flames - 50 W horizontal
and vertical flame test methods
IEC/TS 60695-11-11 -  Fire hazard testing - - -
Part 11-11: Test flames - Determination of
the characteristic heat flux for ignition from
a non-contacting flame source
IEC 60695-11-20 -  Fire hazard testing - EN 60695-11-20 -
Part 11-20: Test flames - 500 W flame test
methods
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 -  Fire safety - Vocabulary EN ISO 13943 -
ISO 871 2006 Plastics - Determination of ignition - -
temperature using a hot-air furnace
ISO 2592 -  Determination of flash and fire points - EN ISO 2592 -
Cleveland open cup method
ISO 2719 -  Determination of flash point - Pensky- EN ISO 2719 -
Martens closed cup method
ISO 5657 -  Reaction to fire tests - Ignitability of - -
building products using a radiant heat
source
ISO 5660-1 -  Reaction-to-fire tests - Heat release, - -
smoke production and mass loss rate -
Part-1: Heat release rate (cone calorimeter
method) and smoke production rate
(dynamic measurement)
ISO 10840 -  Plastics - Guidance for the use of standard - -
fire tests

4

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SIST EN 60695-1-20:2016



IEC 60695-1-20

®


Edition 1.0 2016-01




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE




BASIC SAFETY PUBLICATION

PUBLICATION FONDAMENTALE DE SÉCURITÉ






Fire hazard testing –

Part 1-20: Guidance for assessing the fire hazard of electrotechnical products –

Ignitability – General guidance




Essais relatifs aux risques du feu –

Partie 1-20: Lignes directrices pour l'évaluation des risques du feu des produits


électrotechniques – Allumabilité – Lignes directrices générales














INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 13.220.40, 29.020 ISBN 978-2-8322-3146-3



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

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SIST EN 60695-1-20:2016
– 2 – IEC 60695-1-20:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 7
4 Principles of ignitability . 12
4.1 Gases . 12
4.1.1 Overview . 12
4.1.2 Flammability limits . 12
4.1.3 Arc fires . 12
4.2 Liquids . 13
4.2.1 Overview . 13
4.2.2 Ignition parameters . 13
4.2.3 Insulating liquids . 13
4.3 Solids . 13
4.3.1 Overview . 13
4.3.2 Parameters affecting ignition . 14
4.3.3 Metals . 14
4.3.4 Carbon (graphite) and carbonaceous char . 15
4.3.5 Reactive substances . 15
4.3.6 Dust clouds . 15
5 Consideration for the selection of test methods . 15
5.1 General . 15
5.2 Fire scenario . 16
5.3 Ignition sources . 16
5.3.1 General . 16
5.3.2 Internal ignition sources . 16
5.3.3 External ignition sources . 17
5.3.4 Arc ignition of materials . 18
5.4 Types of test specimen. 19
5.5 Test procedure and apparatus . 20
6 Use and interpretation of results . 20
Annex A (informative) Examples of accidents due to arc fires in underground
hydroelectric power plants or urban substations . 21
A.1 General . 21
A.2 Examples which are generally available (non-exhaustive list) . 21
A.2.1 Underground hydroelectric power plants . 21
A.2.2 Urban substations (non-exhaustive list) . 21
Bibliography . 22

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SIST EN 60695-1-20:2016
IEC 60695-1-20:2016 © IEC 2016 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FIRE HAZARD TESTING –

Part 1-20: Guidance for assessing the
fire hazard of electrotechnical products –
Ignitability – General guidance

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 60695-1-20 has been prepared by IEC technical committee 89:
Fire hazard testing.
This first edition of IEC 60695-1-20 cancels and replaces the first edition of IEC TS 60695-1-
20 published in 2008. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) ISO 5660-1 has been added to the normative references;
b) definitions of “pyrolysis” and “short-circuit” have been added to Clause 3;
c) some text from the introduction has been moved to Clause 5 and is now part of the
normative text;

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SIST EN 60695-1-20:2016
– 4 – IEC 60695-1-20:2016 © IEC 2016
d) Clause 5 now contains several mandatory statements.
The text of this standard is based on the following documents:
FDIS Report on voting
89/1296/FDIS 89/1302/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 2.
It has the status of a basic safety publication in accordance with IEC Guide 104 and
ISO/IEC Guide 51.
In this standard, the terms defined in Clause 3 are printed in bold type.
A list of all parts in the IEC 60695 series, published under the general title Fire hazard testing,
can be found on the IEC website.
The IEC 60695-1 series, under the general title Fire hazard testing, consists of the following
parts:
Part 1-10: Guidance for assessing the fire hazard of electrotechnical products – General
guidelines
Part 1-11: Guidance for assessing the fire hazard of electrotechnical products – Fire hazard
assessment
Part 1-12: Guidance for assessing the fire hazard of electrotechnical products – Fire safety
engineering
Part 1-20: Guidance for assessing the fire hazard of electrotechnical products – Ignitability
– General guidance
Part 1-21: Guidance for assessing the fire hazard of electrotechnical products – Ignitability
– Summary and relevance of test methods
Part 1-30: Guidance for assessing the fire hazard of electrotechnical products –
Preselection testing procedures – General guidelines
Part 1-40: Guidance for assessing the fire hazard of electrotechnical products – Insulating
liquids
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website 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.

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SIST EN 60695-1-20:2016
IEC 60695-1-20:2016 © IEC 2016 – 5 –
INTRODUCTION
Fires are responsible for creating hazards to life and property as a result of the generation of
heat (thermal hazard), and also as a result of the production of toxic effluent, corrosive
effluent and smoke (non-thermal hazard). Fires start with ignition and then can grow, leading
in some cases to flash-over and a fully developed fire. Ignition resistance is therefore one of
the most important parameters of a material to be considered in the assessment of fire
hazard. If there is no ignition, there is no fire.
For most materials (other than metals and some other elements), ignition occurs in the gas
phase. Ignition occurs when combustible vapour, mixed with air, reaches a high enough
temperature for exothermic oxidation reactions to rapidly propagate. The ease of ignition is a
function of the chemical nature of the vapour, the fuel/air ratio and the temperature.
In the case of liquids, the combustible vapour is produced by vaporization of the liquid, and
the vaporization process is dependent on the temperature and chemical composition of the
liquid.
In the case of solids, the combustible vapour is produced by pyrolysis when the temperature
of the solid is sufficiently high. The vaporization process is dependent on the temperature and
chemical composition of the solid, and also on the thickness, density, specific heat, and
thermal conductivity of the solid.
The ease of ignition of a test specimen depends on many variables. Factors to be considered
for the assessment of ignitability are:
a) the geometry of the test specimen, including thickness and the presence of edges,
corners or joints;
b) the surface orientation;
c) the rate and direction of air flow;
d) the nature and position of the ignition source;
e) the magnitude and position of any external heat flux; and
f) whether the combustible material is a solid or a liquid.
The primary aims are to prevent ignition caused by an electrically energized component part,
and in the event of ignition, to confine any resulting fire within the bounds of the enclosure of
the electrotechnical product.
Secondary aims include the minimization of any flame spread beyond the product’s enclosure
and the minimization of harmful effects of fire effluents including heat, smoke, and toxic or
corrosive combustion products.
Fires involving electrotechnical products can also be initiated from external non-electrical
sources. Considerations of this nature are dealt with in an overall fire hazard assessment.
This international standard gives an overview of ignitability and its relevance to the fire hazard
of electrotechnical products.

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SIST EN 60695-1-20:2016
– 6 – IEC 60695-1-20:2016 © IEC 2016
FIRE HAZARD TESTING –

Part 1-20: Guidance for assessing the
fire hazard of electrotechnical products –
Ignitability – General guidance



1 Scope
This part of IEC 60695 provides guidance on the ignitability of electrotechnical products and
the materials from which they are formed. It gives guidance on:
a) the principles of ignitability;
b) the selection of appropriate test methods, and
c) the use and interpretation of results.
This part of IEC 60695 is intended for use by technical committees in 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 60695-1-10, Fire hazard testing – Part 1-10: Guidance for assessing the fire hazard of
electrotechnical products – General guidelines
IEC 60695-1-11, Fire hazard testing – Part 1-11: Guidance for assessing the fire hazard of
electrotechnical products – Fire hazard assessment
IEC 60695-1-12, Fire hazard testing – Part 1-12: Guidance for assessing the fire hazard of
electrotechnical products – Fire safety engineering
IEC TR 60695-1-21, Fire hazard testing – Part 1-21: Guidance for assessing the fire hazard of
electrotechnical products – Ignitability – Summary and relevance of test methods
IEC 60695-2-11, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products (GWEPT)
IEC 60695-2-12, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods –
Glow-wire flammability index (GWFI) test method for materials
IEC 60695-2-13, Fire hazard testing – Part 2-13: Glowing/hot-wire based test methods –
Glow-wire ignition temperature (GWIT) test method for materials

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SIST EN 60695-1-20:2016
IEC 60695-1-20:2016 © IEC 2016 – 7 –
IEC 60695-4:2012, Fire hazard testing – Part 4: Terminology concerning fire tests for
electrotechnical products
IEC 60695-11-5, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method –
Apparatus, confirmatory test arrangement and guidance
IEC 60695-11-10, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and vertical
flame test methods
IEC TS 60695-11-11, Fire hazard testing – Part 11-11: Test flames – Determination of the
characteristic heat flux for ignition from a non-contacting flame source
IEC 60695-11-20, Fire hazard testing – Part 11-20: Test flames – 500 W flame test methods
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, Fire safety – Vocabulary
ISO 871:2006, Plastics – Determination of ignition temperature using a hot-air furnace
ISO 2592, Determination of flash and fire points – Cleveland open cup method
ISO 2719, Determination of flash point – Pensky-Martens closed cup method
ISO 5657, Reaction to fire tests – Ignitability of building products using a radiant heat source
ISO 5660-1, Reaction to fire tests – Heat release smoke production and mass loss rate –
Part 1: Heat release rate (cone calorimeter method)
ISO 10840, Plastics – Guidance for the use of standard fire tests
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13943:2008 and
IEC 60695-4:2012 (some of which are reproduced below), as well as the following, apply.
3.1
auto-ignition
spontaneous ignition
self-ignition CA, US
unpiloted ignition CA, US
DEPRECATED: spontaneous combustion
ignition (3.20) resulting from a rise in temperature without a separate ignition source (3.22)
Note 1 to entry: The ignition can be caused either by self-heating or by heating from an external source.
Note 2 to entry: In North America, “spontaneous ignition” is the preferred term used to designate ignition caused
by self-heating.
[SOURCE: ISO 13943:2008, 4.18]

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SIST EN 60695-1-20:2016
– 8 – IEC 60695-1-20:2016 © IEC 2016
3.2
auto-ignition temperature
spontaneous ignition temperature
minimum temperature at which auto-ignition (3.1) is obtained in a fire test
Note 1 to entry: The typical units are degrees Celsius (°C).
[SOURCE: ISO 13943:2008, 4.19]
3.3
combustion
exothermic reaction of a substance with an oxidizing agent
Note 1 to entry: Combustion generally emits fire effluent accompanied by flames (3.11) and/or glowing.
[SOURCE: ISO 13943:2008, 4.46]
3.4
fire 〈general〉
process of combustion (3.3) characterized by the emission of heat and fire effluent and
usually accompanied by smoke, flame (3.11), 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
(3.5) and fire (3.6), 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, 4.96]
3.5
fire 〈controlled〉
self-supporting combustion (3.3) that has been deliberately arranged to provide useful
effects and is limited in its extent in time and space
[SOURCE: ISO 13943:2008, 4.97]
3.6
fire 〈uncontrolled〉
self-supporting combustion (3.3) 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, 4.98]
3.7
fire hazard
physical object or condition with a potential for an undesirable consequence from fire (3.4)
[SOURCE: ISO 13943:2008, 4.112]
...