SIST EN 60695-1-11:2015

Fire hazard testing - Part 1-11: Guidance for assessing the fire hazard of electrotechnical products - Fire hazard assessment

This part of IEC 60695 provides guidance for assessing the fire hazard of electrotechnical
products and for the resulting development of fire hazard testing as related directly to harm to
people, animals or property.
It outlines a hazard-based process to identify appropriate fire test methods and performance
criteria for products. The principles of the methodology are to identify fire events (fire
scenarios) which will be associated with the product, to establish how the measurable fire
properties of the product are related to the possible occurrence and outcome of those events,
and to establish test methods and performance requirements for those properties which will
either result in a tolerable fire outcome or eliminate the event altogether.
It is intended as guidance to IEC committees, to be used with respect to their individual
applications. The actual implementation of this document remains the responsibility of each
product committee, according to the minimum acceptable fire safety in its application field and
taking into account the feedback from experience.
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 [10].
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 1-11: Anleitung zur Beurteilung der Brandgefahr von elektrotechnischen Erzeugnissen - Beurteilung der Brandgefahr

Essais relatifs aux risque du feu -- Partie 1-11: Lignes directrices pour l'évaluation des risques du feu des produits électrotechniques - Evaluation des risques du feu

L'IEC 60695-1-11:2014 fournit des lignes directrices pour évaluer le danger du feu des produits électrotechniques et pour développer, en conséquence, les essais relatifs au danger du feu liés directement aux dommages aux personnes, aux animaux ou aux biens. Elle expose un processus de danger pour identifier les méthodes d'essai aux feux appropriés et les critères de performance des produits. Les principes de la méthodologie identifient les événements liés au feu (scénarios feu) qui seront associés au produit, pour établir la façon dont les propriétés mesurables du produit sont relatives à la possible survenance et à l'issue de ces événements et pour établir les méthodes d'essai et les exigences de performance pour ces propriétés qui soit donneront lieu à une issue du feu tolérable soit élimineront totalement l'événement. Cette deuxième édition annule et remplace la première édition de l'IEC 60695-1-11 publiée en 2010. Elle constitue une révision technique. Par rapport à l'édition précédente, les modifications majeures sont les suivantes:
- mise à jour des références;
- mise à jour des termes et définitions;
- ajout figure 5 - Description de la gamme de produits et des circonstances d'utilisation;
- et mise à jour de la Bibliographie. Elle a le statut d'une publication fondamentale de sécurité conformément au Guide IEC 104 et au Guide ISO/IEC 51.
Mots-clés: danger du feu, méthode d'essai au feu, évaluation

Preskušanje požarne ogroženosti - 1-11. del: Vodilo za ocenjevanje požarne varnosti elektrotehniških izdelkov - Ocena požarne varnosti

Ta del standarda IEC 60695 podaja navodila za ocenjevanje požarne ogroženosti elektrotehniških izdelkov in za na njem temelječ razvoj preskušanja požarne ogroženosti v povezavi s poškodbami ljudi, živali ali lastnine.
Opredeljuje postopek, ki temelji na požarnih grožnjah, za opredelitev primernih požarnih preskusnih metod in kriterijev delovanja za izdelke. Načela metodologije so opredelitev primerov požarov (požarnih scenarijev), ki so povezani z izdelkom, opredelitev načina za povezavo merljivih požarnih lastnosti izdelka z možnostjo pojava teh scenarijev in njihovih posledic, ter opredelitev preskusnih metod in zahtev delovanja za tiste lastnosti, ki so lahko vzrok za pojav še sprejemljivih požarnih posledic ali ki lahko povsem preprečijo pojav požarnega scenarija.
Standard predstavlja smernice, ki jih odbori IEC lahko uporabljajo za njihove namene. Za dejansko uporabo tega dokumenta so odgovorni odbori vsakega posameznega izdelka ob upoštevanju minimalne sprejemljive stopnje požarne varnosti na področju uporabe izdelka in preteklih povratnih informacij.
Ta osnovna varnostna publikacija je namenjena tehničnim odborom za pripravo standardov v skladu z načeli vodil IEC 104 in ISO/IEC 51 [10].
Ena od odgovornosti tehničnega odbora je, da kjer je to primerno, uporablja osnovne varnostne publikacije. 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: 09-Nov-2015
• 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: 05-Nov-2015
• Due Date: 10-Jan-2016
• Completion Date: 10-Nov-2015
• Ref Project: EN 60695-1-11:2015 - Fire hazard testing - Part 1-11: Guidance for assessing the fire hazard of electrotechnical products - Fire hazard assessment

Relations

• Replaces: SIST EN 60695-1-11:2010 - Fire hazard testing - Part 1-11: Guidance for assessing the fire hazard of electrotechnical products - Fire hazard assessment (IEC 60695-1-11:2010)
• Effective Date: 29-Jan-2023
• Replaces: SIST EN 60695-1-11:2010 - Fire hazard testing - Part 1-11: Guidance for assessing the fire hazard of electrotechnical products - Fire hazard assessment (IEC 60695-1-11:2010)
• Effective Date: 01-Dec-2015
• Replaces: SIST EN 60695-1-11:2010 - Fire hazard testing - Part 1-11: Guidance for assessing the fire hazard of electrotechnical products - Fire hazard assessment (IEC 60695-1-11:2010)
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60695-1-11:2015
01-december-2015
1DGRPHãþD
SIST EN 60695-1-11:2010
Preskušanje požarne ogroženosti - 1-11. del: Vodilo za ocenjevanje požarne
varnosti elektrotehniških izdelkov - Ocena požarne varnosti
Fire hazard testing - Part 1-11: Guidance for assessing the fire hazard of electrotechnical
products - Fire hazard assessment
Prüfungen zur Beurteilung der Brandgefahr - Teil 1-11: Anleitung zur Beurteilung der
Brandgefahr von elektrotechnischen Erzeugnissen - Beurteilung der Brandgefahr
Essais relatifs aux risque du feu -- Partie 1-11: Lignes directrices pour l'évaluation des
risques du feu des produits électrotechniques - Evaluation des risques du feu
Ta slovenski standard je istoveten z: EN 60695-1-11:2015
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 60695-1-11:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60695-1-11:2015

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SIST EN 60695-1-11:2015


EUROPEAN STANDARD EN 60695-1-11

NORME EUROPÉENNE

EUROPÄISCHE NORM
October 2015
ICS 29.020; 13.220.40 Supersedes EN 60695-1-11:2010
English Version
Fire hazard testing - Part 1-11: Guidance for assessing the fire
hazard of electrotechnical products - Fire hazard assessment
(IEC 60695-1-11:2014)
Essais relatifs aux risques du feu - Partie 1-11: Lignes Prüfungen zur Beurteilung der Brandgefahr -
directrices pour l'évaluation du danger du feu des produits Teil 1-11: Anleitung zur Beurteilung der Brandgefahr von
électrotechniques - Evaluation du danger du feu elektrotechnischen Erzeugnissen - Beurteilung
(IEC 60695-1-11:2014) der Brandgefahr
(IEC 60695-1-11:2014)
This European Standard was approved by CENELEC on 2014-11-12. 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
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 60695-1-11:2015 E

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SIST EN 60695-1-11:2015
EN 60695-1-11:2015
European foreword
The text of document 89/1220/FDIS, future edition 2 of IEC 60695-1-11, prepared by IEC/TC 89 "Fire
hazard testing" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 60695-1-11:2015.
The following dates are fixed:
(dop) 2016-05-13
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2017-11-12
• latest date by which the national standards conflicting with
the document have to be withdrawn

This document supersedes EN 60695-1-11:2010.
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 60695-1-11:2014 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 60695-6-2 NOTE Harmonized as EN 60695-6-2.
IEC 60695-7-1:2010 NOTE Harmonized as EN 60695-7-1:2010 (not modified).
IEC 60695-7-2 NOTE Harmonized as EN 60695-7-2.
IEC 60695-7-3:2011 NOTE Harmonized as EN 60695-7-3:2011 (not modified).
IEC 60695-9-2 NOTE Harmonized as EN 60695-9-2.
IEC 61386-21:2002 NOTE Harmonized as EN 61386-21:2004 (not modified).
2

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SIST EN 60695-1-11:2015
EN 60695-1-11:2015
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 2009 Fire hazard testing - EN 60695-1-10 2010
Part 1-10: Guidance for assessing the fire
hazard of electrotechnical products -
General guidelines
IEC 60695-1-12 -  Fire hazard testing - - -
Part 1-12: Guidance for assessing the fire
hazard of electrotechnical products - Fire
safety engineering
IEC 60695-4 2012 Fire hazard testing - EN 60695-4 2012
Part 4: Terminology concerning fire tests
for electrotechnical products
IEC Guide 104 2010 The preparation of safety publications and - -
the use of basic safety publications and
group safety publications
ISO 13943 2008 Fire safety - Vocabulary EN ISO 13943 2010

3

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SIST EN 60695-1-11:2015

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SIST EN 60695-1-11:2015



IEC 60695-1-11

®


Edition 2.0 2014-10




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE




BASIC SAFETY PUBLICATION

PUBLICATION FONDAMENTALE DE SÉCURITÉ





Fire hazard testing –

Part 1-11: Guidance for assessing the fire hazard of electrotechnical products –

Fire hazard assessment




Essais relatifs aux risques du feu –

Partie 1-11: Lignes directrices pour l'évaluation du danger du feu des produits


électrotechniques – Evaluation du danger du feu













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX X


ICS 13.220.40, 29.020 ISBN 978-2-8322-1862-4



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 60695-1-11:2015
– 2 – IEC 60695-1-11:2014 © IEC 2014
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Elements of fire hazard assessment . 14
4.1 Ignition sources . 14
4.2 Fire hazard . 14
4.3 Fire risk . 14
4.4 Fire hazard assessment . 15
5 Fire hazard tests. 15
6 The fire hazard assessment process . 16
6.1 General . 16
6.2 Definition of the product range and the circumstances of use . 17
6.3 Identification and analysis of fire scenarios . 17
6.3.1 General . 17
6.3.2 Qualitative description of the fire scenario . 17
6.3.3 Quantitative analysis of the fire scenario . 18
6.3.4 Simple hypothetical fire scenarios. 19
6.4 Selection of criteria for acceptable fire scenario outcomes . 20
6.5 Performance requirements . 20
6.6 Interpretation of test results . 20
6.7 Consequential testing . 21
7 Extent and limitations of the fire hazard assessment . 21
8 Fire test requirements and specifications . 21
Annex A (informative) Calculation of acceptable toxic yield values for an electrical
insulation material, based on a simple hypothetical fire scenario. 28
A.1 Definition of the fire scenario . 28
A.2 Irritant fire effluent . 28
A.2.1 F values . 28
A.2.2 Equation for irritants . 28
A.2.3 Calculation of the X values . 29
i
A.3 Asphyxiant fire effluent . 29
A.3.1 Exposure dose . 29
A.3.2 Equation for asphyxiants . 29
A.3.3 Calculation of X . 30
CO
A.3.4 Calculation of XHCN . 31
A.4 Carbon dioxide . 32
A.5 Conclusions . 32
Annex B (informative) Use of rigid plastic conduit – A fire hazard assessment . 33
B.1 General . 33
B.2 Terms and definitions . 33
B.3 Products covered by this fire hazard assessment . 33
B.4 Circumstances of use. 33
B.4.1 Conduit and wiring . 33

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SIST EN 60695-1-11:2015
IEC 60695-1-11:2014 © IEC 2014 – 3 –
B.4.2 Building construction . 34
B.5 Fire scenarios . 34
B.6 Relevant fire behaviour . 35
B.6.1 General . 35
B.6.2 Modelling the exposure fire . 35
B.6.3 Predicting mass loss of the conduit . 36
B.7 Results . 36
B.7.1 Comparative of fires with and without RPC . 36
B.7.2 Assessment of the contribution of RPC to temperature rise. 36
B.7.3 Assessment of the contribution of RPC to smoke production. 36
B.7.4 Assessment of the contribution of RPC to the production of toxic
effluent . 37
B.8 Interpretation of results – Significance and precision . 38
B.9 Conclusions . 39
Bibliography . 45

Figure 1 – Flowchart 1 for description of the fire scenario . 23
Figure 2 – Flowchart 1A for evaluation of ignitability/flammability . 24
Figure 3 – Flowchart 1B for evaluation of flame propagation and heat release . 25
Figure 4 – Flowchart 1C for evaluation of fire effluent . 26
Figure 5 – Flowchart for description of the range of products and circumstances of use . 27
Figure B.1 – Schematic of conduit installation . 40
Figure B.2 – Corridor upper layer temperature (concrete wall) . 40
Figure B.3 – Corridor upper layer temperature (gypsum wall board) . 41
Figure B.4 – Flux measured at the conduit 2 m away (concrete wall) . 41
Figure B.5 – Flux measured at the conduit 2 m away (gypsum wall) . 42
Figure B.6 – Comparative mass loss rates of furniture and conduit (concrete wall) . 42
Figure B.7 – Comparative mass loss rates of furniture and conduit (gypsum wall board) . 43
Figure B.8 – Relative increase of toxicity due to exposed conduit (concrete wall) . 43
Figure B.9 – Relative increase of toxicity due to exposed conduit (gypsum wall board) . 44

Table A.1 – Irritant F values and calculated X values for the defined fire scenario . 29
Table A.2 – Asphyxiant X values calculated for the defined fire scenario . 30
Table A.3 – Incapacitation times for hydrogen cyanide . 31
Table A.4 – Multiplication factors for carbon dioxide . 32
Table B.1 – Summary of fire scenario information . 35
Table B.2 – Time of occurrence of highly hazardous conditions in building corridors . 38

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SIST EN 60695-1-11:2015
– 4 – IEC 60695-1-11:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FIRE HAZARD TESTING –

Part 1-11: Guidance for assessing the fire
hazard of electrotechnical products –
Fire hazard assessment

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 60695-1-11 has been prepared by IEC technical committee 89:
Fire hazard testing.
This second edition cancels and replaces the first edition of IEC 60695-1-11 published in
2010, and constitutes a technical revision.
The main changes with respect to the previous edition are:
a) Updated references;
b) Updated terms and definitions; and
c) Added Figure 5 – Description of range of products and circumstances of use; and
d) Updated Bibliography.

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SIST EN 60695-1-11:2015
IEC 60695-1-11:2014 © IEC 2014 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
89/1220/FDIS 89/1239/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
1
ISO/IEC Guide 51 [10] .
This standard is to be used in conjunction with IEC 60695-1-10.
A list of all the parts in the IEC 60695 series, under the general title Fire hazard testing, can
be found on the IEC website.
Part 1 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
2
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 process – 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 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.
___________
1
 Figures in square brackets refer to the Bibliography.
2
 To be published.

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SIST EN 60695-1-11:2015
– 6 – IEC 60695-1-11:2014 © IEC 2014

INTRODUCTION
In the design of any electrotechnical product the risk of fire and the potential hazards
associated with fire need to be considered. In this respect the objective of component, circuit
and equipment design as well as the choice of materials is to reduce to acceptable levels the
potential risks of fire even in the event of foreseeable abnormal use, malfunction or failure.
This standard, together with its companion, IEC 60695-1-10, provides guidance on how this is
to be accomplished.
The primary aims are to prevent ignition caused by an electrically energised 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 minimisation of any flame spread beyond the product’s enclosure
and the minimisation 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 the overall fire hazard assessment.
Fire hazard assessment is used to identify the kinds of fire events (fire scenarios) which will
be associated with the product, to establish how the measurable fire properties of the product
are related to the outcome of those events, and to establish test methods and performance
requirements for those properties which will either result in a tolerable fire outcome or
eliminate the event altogether.
Annex A demonstrates a relatively simple fire hazard assessment process as applied to the
toxic hazard from a burning material.
Annex B demonstrates a more complex fire hazard assessment process as applied to an
electrotechnical product, rigid plastic conduit.
Attention is drawn to the principles in IEC Guide 104, and to the role of committees with
horizontal safety functions and group safety functions.

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SIST EN 60695-1-11:2015
IEC 60695-1-11:2014 © IEC 2014 – 7 –
FIRE HAZARD TESTING –

Part 1-11: Guidance for assessing the fire
hazard of electrotechnical products –
Fire hazard assessment



1 Scope
This part of IEC 60695 provides guidance for assessing the fire hazard of electrotechnical
products and for the resulting development of fire hazard testing as related directly to harm to
people, animals or property.
It outlines a hazard-based process to identify appropriate fire test methods and performance
criteria for products. The principles of the methodology are to identify fire events (fire
scenarios) which will be associated with the product, to establish how the measurable fire
properties of the product are related to the possible occurrence and outcome of those events,
and to establish test methods and performance requirements for those properties which will
either result in a tolerable fire outcome or eliminate the event altogether.
It is intended as guidance to IEC committees, to be used with respect to their individual
applications. The actual implementation of this document remains the responsibility of each
product committee, according to the minimum acceptable fire safety in its application field and
taking into account the feedback from experience.
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 [10].
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 60695-1-10:2009, Fire hazard testing – Part 1-10: Guidance for assessing the fire hazard
of electrotechnical products – General guidelines
IEC 60695-1-12, Fire hazard testing – Part 1-12 Guidance for assessing the fire hazard of
3
electrotechnical products – Fire safety engineering
IEC 60695-4:2012, Fire hazard testing – Part 4: Terminology concerning fire tests for
electrotechnical products
___________
3
 To be published.

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SIST EN 60695-1-11:2015
– 8 – IEC 60695-1-11:2014 © IEC 2014
IEC Guide 104:2010, The preparation of safety publications and the use of basic safety
publications and group safety publications
ISO 13943:2008, Fire safety – Vocabulary
3 Terms and definitions
For the purposes of this document the following terms and definitions apply.
3.1
asphyxiant
toxicant that causes hypoxia, which can result in central nervous system depression or
cardiovascular effects
Note 1 to entry: Loss of consciousness and ultimately death may occur.
[SOURCE: ISO 13943:2008, definition 4.17]
3.2
available safe escape time
ASET
time available for escape for an individual occupant, the calculated time interval between the
time of ignition and the time at which conditions become such that the occupant is estimated
to be incapacitated, i.e. unable to take effective action to escape to a safe refuge or place of
safety
Note 1 to entry: The time of ignition can be known, e.g. in the case of a fire model or a fire test, or it may be
assumed, e.g. it may be based upon an estimate working back from the time of detection. The basis on which the
time of ignition is determined is always stated.
Note 2 to entry: This definition equates incapacitation with failure to escape. Other criteria for ASET are possible.
If an alternate criterion is selected, it is necessary that it be stated.
Note 3 to entry: Each occupant can have a different value of ASET, depending on that occupant’s personal
characteristics.
[SOURCE: ISO 13943:2008, definition 4.20]
3.3
built environment
building or other structure
EXAMPLES Off-shore platforms, civil engineering works, such as tunnels, bridges and mines; and means of
transportation such as motor vehicles and marine vessel
...