SIST EN 60695-7-3:2012

Fire hazard testing - Part 7-3: Toxicity of fire effluent - Use and interpretation of test results

IEC 60695-7-3:2011 concerns laboratory tests used to measure the toxic components of the fire effluent from either electrotechnical products or materials used in electrotechnical products. It provides guidance on the use and interpretation of results from such tests. It discusses currently available approaches to toxic hazard assessment consistent with the approach of ISO TC 92 SC 3, as set out in ISO 13344, ISO 13571, ISO 16312-1, ISO 16312-2, ISO 19701, ISO 19702 and ISO 19706. It also provides guidance on the use of toxic potency data in fire hazard assessment and on principles which underlie the use of combustibility and toxicological information in fire hazard assessment. The methods described are applicable to data concerning both the incapacitating effects and the lethal effects of fire effluents. This first edition cancels and replaces the second edition of IEC/TS 60695-7-3 published in 2004. It constitutes a technical revision and now has a status of an International Standard. The main changes with respect to the previous edition are listed below:  - change of designation from a Technical Specification to an International Standard;  - the Foreword, Introduction, and Clauses 1, 2 and 3 have been updated;  - expanded in all areas to further clarify the alignment with ISO/TC 92 Fire Safety and in particular with ISO 13344, ISO 13571, ISO/IEC 13943, ISO 16312-1, ISO 16312-2, ISO 19701, ISO 19702 and ISO 19706. It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC Guide 51.   This publication is to be read in conjunction with IEC 60695-7-1:2010 and IEC 60695-7-2:2002.

Prüfungen zur Beurteilung der Brandgefahr -- Teil 7-3: Toxizität von Rauch und/oder Brandgasen - Anwendung und Beurteilung von Prüfergebnissen

Essais relatifs aux risques du feu - Partie 7-3: Utilisation et interprétation des résultats d'essai

La CEI 60695-7-3:2011 concerne les essais en laboratoire utilisés pour mesurer les composants toxiques des effluents du feu provenant des produits électrotechniques ou des matériaux utilisés dans ces produits. Elle fournit des indications pour l'utilisation et l'interprétation des résultats obtenus lors de ces essais. Elle traite des approches actuellement disponibles pour l'évaluation du danger toxique, compatibles avec l'approche du TC 92 SC 3 de l'ISO, telle qu'elle est définie dans l'ISO 13344, l'ISO 13571, l'ISO 16312-1, l'ISO 16312-2, l'ISO 19701, l'ISO 19702 et l'ISO 19706. Elle fournit également des indications pour l'utilisation des données de potentiel toxique dans l'évaluation du danger d'incendie et sur les principes qui mettent l'accent sur l'utilisation des informations sur la combustion et la toxicologie dans l'évaluation du danger d'incendie. Les méthodes décrites sont applicables aux données concernant à la fois les effets incapacitants et les effets létaux des effluents du feu. Cette première édition annule et remplace la deuxième édition de la CEI/TS 60695-7-3, parue en 2004. Elle constitue une révision technique qui conduit au statut de Norme internationale. Les principales modifications par rapport à l'édition précédente sont indiquées ci-dessous:  - changement de désignation d'une spécification technique à une Norme internationale;  - mise à jour de l'avant-propos, de l'Introduction et des Articles 1, 2 et 3;  - la norme a été étoffée dans tous les domaines, afin de préciser son alignement sur les travaux du TC 92 de l'ISO, Sécurité au feu, et en particulier sur l'ISO 13344, l'ISO 13571, l'ISO/CEI 13943, l'ISO 16312-1, l'ISO 16312-2, l'ISO 19701, l'ISO 19702 et l'ISO 19706. Elle a le statut d'une publication fondamentale de sécurité, conformément au Guide CEI 104 et au Guide ISO/CEI 51.   Cette publication doit être lue conjointement avec la CEI 60695-7-1:2010 et la CEI 60695-7-2:2002.

Preskušanje požarne ogroženosti - 7-3. del: Toksičnost dimnih plinov - Uporaba in predstavitev rezultatov preskušanja

Ta del IEC 60695 obravnava laboratorijske preskuse, ki se uporabljajo za merjenje toksičnih komponent dimnih plinov iz elektrotehničnih proizvodov ali materialov, ki se uporabljajo v elektrotehničnih proizvodih. Zagotavlja smernice za uporabo in tolmačenje rezultatov iz takšnih preskusov. Obravnava trenutno razpoložljive pristope za ocenitev toksične ogroženosti, skladne s pristopom ISO TC 92 SC 3, kot je navedeno v ISO 13344, ISO 13571, ISO 16312-1, ISO 16312-2, ISO 19701, ISO 19702 in ISO 19706. Prav tako zagotavlja navodila pri uporabi podatkov o učinkovitosti strupov pri ocenjevanju požarne ogroženosti in načelih, ki so podlaga za uporabo gorljivosti in toksičnosti pri oceni požarne ogroženosti. Opisane metode veljajo za podatke v zvezi z učinki onesposobitve in smrtonosnimi učinki dimnih plinov. Ta osnovna varnostna objava je namenjena temu, da jo uporabljajo tehnični odbori pri pripravi standardov v skladu z načeli, opredeljenimi v Vodilu 104 IEC in Vodilu 51 ISO/IEC. Ena od odgovornosti tehničnega odbora je, če je to primerno, uporabiti temeljne varnostne objave pri pripravi svojih objav. Zahteve, preskusne metode ali preskusni pogoji te temeljne varnostne objave se ne uporabljajo, razen če se ustrezne objave nanje izrecno sklicujejo ali jih vključujejo.

General Information

• Status: Published
• Publication Date: 14-Nov-2011
• 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: 14-Nov-2011
• Due Date: 19-Jan-2012
• Completion Date: 15-Nov-2011
• Ref Project: EN 60695-7-3:2011 - Fire hazard testing - Part 7-3: Toxicity of fire effluent - Use and interpretation of test results

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60695-7-3:2012
01-januar-2012
3UHVNXãDQMHSRåDUQHRJURåHQRVWLGHO7RNVLþQRVWGLPQLKSOLQRY8SRUDEDLQ
SUHGVWDYLWHYUH]XOWDWRYSUHVNXãDQMD
Fire hazard testing - Part 7-3: Toxicity of fire effluent - Use and interpretation of test
results
Prüfungen zur Beurteilung der Brandgefahr -- Teil 7-3: Toxizität von Rauch und/oder
Brandgasen - Anwendung und Beurteilung von Prüfergebnissen
Essais relatifs aux risques du feu - Partie 7-3: Utilisation et interprétation des résultats
d'essai
Ta slovenski standard je istoveten z: EN 60695-7-3:2011
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 60695-7-3:2012 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60695-7-3:2012

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SIST EN 60695-7-3:2012

EUROPEAN STANDARD
EN 60695-7-3

NORME EUROPÉENNE
October 2011
EUROPÄISCHE NORM

ICS 13.220.40; 29.020


English version


Fire hazard testing -
Part 7-3: Toxicity of fire effluent -
Use and interpretation of test results
(IEC 60695-7-3:2011)


Essais relatifs aux risques du feu -  Prüfungen zur Beurteilung der
Partie 7-3: Toxicité des effluents du feu - Brandgefahr -
Utilisation et interprétation des résultats Teil 7-3: Toxizität von Rauch und/oder
d'essai Brandgasen -
(CEI 60695-7-3:2011) Anwendung und Beurteilung von
Prüfergebnissen
(IEC 60695-7-3:2011)





This European Standard was approved by CENELEC on 2011-10-04. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60695-7-3:2011 E

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SIST EN 60695-7-3:2012
EN 60695-7-3:2011 - 2 -
Foreword
The text of document 89/1058/FDIS, future edition 1 of IEC 60695-7-3, prepared by IEC/TC 89 "Fire
hazard testing" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN 60695-7-3:2011.

The following dates are fixed:
(dop) 2012-07-04
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2014-10-04
• latest date by which the national
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 60695-7-3:2011 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60695-6-1:2005 NOTE  Harmonized as EN 60695-6-1:2005 (not modified).

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SIST EN 60695-7-3:2012
- 3 - EN 60695-7-3:2011
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

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 60695-1-10 - 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 60695-7-1 - Fire hazard testing - EN 60695-7-1 -
Part 7-1: Toxicity of fire effluent - General
guidance


IEC 60695-7-2 - Fire hazard testing - EN 60695-7-2 -
Part 7-2: Toxicity of fire effluent - Summary
and relevance of 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 13344 2004 Estimation of the lethal toxic potency of fire - -
effluents


ISO 13571 2007 Life-threatening components of fire - - -
Guidelines for the estimation of time available
for escape using fire data


ISO 13943 2008 Fire safety - Vocabulary EN ISO 13943 2010


ISO 16312-1 - Guidance for assessing the validity of physical - -
fire models for obtaining fire effluent toxicity
data for fire hazard and risk assessment -
Part 1: Criteria


ISO/TR 16312-2 - Guidance for assessing the validity of physical - -
fire models for obtaining fire effluent toxicity
data for fire hazard and risk assessment -
Part 2: Evaluation of individual physical fire
models


ISO 19701 - Methods for sampling and analysis of fire - -
effluents


ISO 19702 - Toxicity testing of fire effluents - Guidance for - -
analysis of gases and vapours in fire effluents
using FTIR gas analysis

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SIST EN 60695-7-3:2012
EN 60695-7-3:2011 - 4 -
Publication Year Title EN/HD Year
ISO 19706 - Guidelines for assessing the fire threat to - -
people

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SIST EN 60695-7-3:2012
IEC 60695-7-3
®

Edition 1.0 2011-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ

Fire hazard testing –
Part 7-3: Toxicity of fire effluent – Use and interpretation of test results

Essais relatifs aux risques du feu –
Partie 7-3: Toxicité des effluents du feu – Utilisation et interprétation des
résultats d'essai


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 13.220.40; 29.020 ISBN 978-2-88912-629-3

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60695-7-3:2012
– 2 – 60695-7-3 © IEC:2011
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references. 7
3 Terms and definitions . 8
4 Principles of toxic hazard assessment . 14
4.1 General . 14
4.2 Exposure dose. 15
4.3 Determination of concentration-time data . 16
4.4 Asphyxiants and the fractional effective dose, FED . 17
4.4.1 General . 17
4.4.2 Properties of the FED . 17
4.4.3 Uses of the FED . 18
4.5 Irritants and the fractional effective concentration, FEC . 18
4.6 Carbon dioxide . 19
4.7 Oxygen vitiation . 19
4.8 Heat stress . 19
4.9 Effects of stratification and transport of fire atmospheres . 19
5 Methods of toxic hazard assessment . 19
5.1 General approach . 19
5.2 Equations used to predict death . 19
5.2.1 Simple toxic gas model . 19
5.2.2 The N-gas model . 20
5.2.3 Hyperventilatory effect of carbon dioxide . 20
5.2.4 Lethal toxic potency values . 20
5.2.5 Mass loss model . 21
5.3 Equations used to predict incapacity . 21
5.3.1 Asphyxiant gas model . 21
5.3.2 Irritant gas model . 22
5.3.3 Mass loss model . 22
6 Toxic potency values . 22
6.1 Generic values of toxic potency . 22
6.2 Toxic potency values obtained from chemical analyses . 22
6.3 Toxic potency values obtained from animal tests . 22
7 Limitations on the interpretation of toxicity test results . 22
8 Effluent components to be measured . 23
8.1 Minimum reporting . 23
8.2 Additional reporting . 23
8.2.1 Gaseous fire effluent components . 23
8.2.2 Airborne particulates . 24
Annex A (informative) Guidance for the use of LC values . 25
50
Annex B (informative) A simple worked example to illustrate the principles of a toxic
hazard analysis . 28
Annex C (informative) F values for irritants . 32
Bibliography . 33

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SIST EN 60695-7-3:2012
60695-7-3 © IEC:2011 – 3 –

Figure 1 – Exposure dose as a function of time and concentration . 15
Figure 2 – Time dependent components of fire hazard . 16
Figure 3 – Total FED and contributors, as a function of time . 18
Figure B.1 – Flame spread rate for materials A and B . 29
Figure B.2 – Relative toxic hazard of two materials – time to lethality, i.e. FED ≥ 1 . 31

Table 1 – Some toxic potency values . 20
Table 2 – Combustion products . 24
Table B.1 – Example FED calculation data for material A . 30
Table B.2– Example FED calculation data for material B . 30
Table C.1 – F values for irritants . 32

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SIST EN 60695-7-3:2012
– 4 – 60695-7-3 © IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FIRE HAZARD TESTING –

Part 7-3: Toxicity of fire effluent –
Use and interpretation of test results


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 60695-7-3 has been prepared by IEC technical committee 89: Fire
hazard testing.
This first edition cancels and replaces the second edition of IEC/TS 60695-7-3 published in
2004. It constitutes a technical revision and now has a status of an International Standard.
It has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC
Guide 51.
This International Standard is to be used in conjunction with IEC 60695-7-1 and
IEC 60695-7-2.
The main changes with respect to the previous edition are listed below:
– change of designation from a Technical Specification to an International Standard;

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SIST EN 60695-7-3:2012
60695-7-3 © IEC:2011 – 5 –
– the Foreword, Introduction, and Clauses 1, 2 and 3 have been updated;
– expanded in all areas to further clarify the alignment with ISO/TC 92 Fire Safety and in
particular with ISO 13344, ISO 13571, ISO/IEC 13943, ISO 16312-1, ISO 16312-2,
ISO 19701, ISO 19702 and ISO 19706;
The text of this standard is based on the following documents:
FDIS Report on voting
89/1058/FDIS 89/1072/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.
A list of all the parts in the 60695 series, under the general title Fire hazard testing, can be
found on the IEC website.
Part 7 consists of the following parts:
Part 7-1: Toxicity of fire effluent – General guidance
Part 7-2: Toxicity of fire effluent – Summary and relevance of test methods
Part 7-3: Toxicity of fire effluent – Use and interpretation of test results
Part 7-50: Toxicity of fire effluent – Estimation of toxic potency – Apparatus and test method
Part 7-51: Toxicity of fire effluent – Estimation of toxic potency – Calculation and
interpretation of test results
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.

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SIST EN 60695-7-3:2012
– 6 – 60695-7-3 © IEC:2011
INTRODUCTION
Electrotechnical products sometimes become involved in fires. However, except for certain
specific cases (e.g. power generating stations, mass transit tunnels, computer suites),
electrotechnical products are not normally present in sufficient quantities to form the major
source of toxic hazard. For example, in domestic dwellings and places of public assembly,
electrotechnical products are usually a very minor source of fire effluent compared with, for
example, furnishings.
It should be noted that the IEC 60695-7 series of publications is subject to the ongoing
evolution of fire safety philosophy within ISO/TC 92.
The guidance in this international standard is consistent with the principles of fire safety
developed by ISO TC 92 SC 3 on toxic hazards in fire, as described in ISO 13344, ISO 13571.
ISO 16312-1, ISO 16312-2, ISO 19701, ISO 19702 and ISO 19706. General guidance for the
fire hazard assessment of electrotechnical products is given in IEC 60695-1-10 and
IEC 60695-1-11.
In 1989, the following views were expressed in ISO/TR 9122-1.
"Small-scale toxic potency tests as we know them today are inappropriate for regulatory
purposes. They cannot provide rank orderings of materials with respect to their propensity to
produce toxic atmospheres in fires. All currently available tests are limited because of their
inability to replicate the dynamics of fire growth which determine the time/concentration profiles
of the effluent in full-scale fires, and the response of electrotechnical products, not just
materials. This is a crucial limitation because the toxic effects of combustion effluent are now
known to depend much more on the rates and conditions of combustion than on the chemical
constitution of the burning materials."
Because of these limitations IEC TC 89 has developed IEC 60695-7-50 and ISO subsequently

1
developed ISO/TS 19700 [1] . Both these standards use the same apparatus. It is a practical
small-scale apparatus which is used to measure toxic potency and which, by virtue of its ability
to model defined stages of a fire, yields toxic potency data suitable for use, with appropriate
additional data, in a full hazard assessment. Both methods use variations in air flow and
temperature to give different physical fire models, but the ISO test method additionally uses the
equivalence ratio as a key parameter.
The evidence from fires and fire casualties, when taken with data from experimental fire and
combustion toxicity studies, suggests that chemical species with unusually high toxicity are not
important (see Clause 7). Carbon monoxide is by far the most significant agent contributing to
toxic hazard. Other agents of major significance are hydrogen cyanide, carbon dioxide and
irritants. There are also other important, non-toxic, threats to life such as the effects of heat,
radiant energy, depletion of oxygen and smoke obscuration, all of which are discussed in
ISO 13571. General guidance on smoke obscuration is provided in IEC 60695-6-1.
IEC TC89 recognizes that effective mitigation of toxic hazard from electrotechnical products is
best accomplished by tests and regulations leading to improved resistance to ignition and to
reduced rates of fire growth, thus limiting the level of exposure to fire effluent and facilitating
escape.
___________
1
Figures in square brackets refer to the bibliography.

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SIST EN 60695-7-3:2012
60695-7-3 © IEC:2011 – 7 –
FIRE HAZARD TESTING –

Part 7-3: Toxicity of fire effluent –
Use and interpretation of test results



1 Scope
This part of IEC 60695 concerns laboratory tests used to measure the toxic components of the
fire effluent from either electrotechnical products or materials used in electrotechnical
products. It provides guidance on the use and interpretation of results from such tests. It
discusses currently available approaches to toxic hazard assessment consistent with the
approach of ISO TC 92 SC 3, as set out in ISO 13344, ISO 13571, ISO 16312-1, ISO 16312-2,
ISO 19701, ISO 19702 and ISO 19706. It also provides guidance on the use of toxic potency
data in fire hazard assessment and on principles which underlie the use of combustibility and
toxicological information in fire hazard assessment.
The methods described are applicable to data concerning both the incapacitating effects and
the lethal effects of fire effluents.
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 referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
IEC 60695-1-10, Fire hazard testing – Part 1-10: Guidance for assessing 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 60695-7-1, Fire hazard testing – Part 7-1: Toxicity of fire effluent – General guidance
IEC 60695-7-2, Fire hazard testing – Part 7-2: Toxicity of fire effluent – Summary and
relevance of 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/IEC 13943:2008, Fire safety – Vocabulary
ISO 13344:2004, Estimation of the lethal toxic potency of fire effluents

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SIST EN 60695-7-3:2012
– 8 – 60695-7-3 © IEC:2011
ISO 13571:2007, Life-threatening components of fire – Guidelines for the estimation of time
available for escape using fire data
ISO 16312-1, Guidance for assessing the validity of physical fire models for obtaining fire
effluent toxicity data for fire hazard and risk assessment – Part 1: Criteria
ISO/TR 16312-2, Guidance for assessing the validity of physical fire models for obtaining fire
effluent toxicity data for fire hazard and risk assessment – Part 2: Evaluation of individual
physical fire models
ISO 19701, Methods for sampling and analysis of fire effluents
ISO 19702, Toxicity testing of fire effluents – Guidance for analysis of gases and vapours in
fire effluents using FTIR gas analysis
2
ISO 19706 , Guidelines for assessing the fire threat to people
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 13943, some of
which are reproduced below for the user’s convenience, apply.
3.1
asphyxiant
toxicant that causes hypoxia, which can result in central nervous system depression or
cardiovascular effects
NOTE Loss of consciousness and ultimately death can occur.
[ISO/IEC 13943:2008, definition 4.17]
3.2
burn, intransitive verb
undergo combustion
[ISO/IEC 13943:2008, definition 4.28]
3.3
burn, transitive verb
cause combustion
[ISO/IEC 13943:2008, definition 4.29]
3.4
combustible, adjective
capable of being ignited and burned
[ISO/IEC 13943:2008, definition 4.43]
3.5
combustible, noun
item capable of combustion
[ISO/IEC 13943:2008, definition 4.44]
___________
2
ISO 9122-1: Toxicity testing of fire effluents – Part 1: General has been withdrawn and replaced by ISO 19706.

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SIST EN 60695-7-3:2012
60695-7-3 © IEC:2011 – 9 –
3.6
combustion
exothermic reaction of a substance with an oxidizing agent
NOTE Combustion generally emits fire effluent accompanied by flames and/or glowing.
[ISO/IEC 13943:2008, definition 4.46]
3.7
concentration
mass per unit volume
–3
NOTE 1 For a fire effluent, the typical units are grams per cubic metre (g × m ).
NOTE 2 For a toxic gas, concentration is usually expressed as a volume fraction at T = 298 K and P = 1 atm, with
3 3 –6
typical units of microlitres per litre (µL/L), which is equivalent to cm /m or 10 .
NOTE 3 The concentration of a gas at a temperature, T, and a pressure, P can be calculated from its volume
fraction (assuming ideal gas behaviour) by multiplying the volume fraction by the density of the gas at that
temperature and pressure.
[ISO/IEC 13943:2008, definition 4.52]
3.8
effective concentration 50
EC
50
concentration of a toxic gas or fire effluent, statistically calculated from concentration-response
data, that causes a specified effect in 50 % of a population of a given species within a
specified exposure time and post-exposure time
–3
NOTE 1 For fire effluent, typical units are grams per cubic metre (g × m ).
NOTE 2 For a toxic gas, typical units are microlitres per litre (µL/L) (at T = 298 K and P = 1 atm); see volume
fraction.
NOTE 3 The observed effect is usually a behavioural response, incapacitation, or death. The EC for
50
incapacitation is termed the IC
...