IEC 60695-1-11:2010

IEC 60695-1-11 ®
Edition 1.0 2010-06
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 des risques du feu des produits
électrotechniques – Evaluation des risques du feu

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IEC 60695-1-11 ®
Edition 1.0 2010-06
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 des risques du feu des produits
électrotechniques – Evaluation des risques du feu

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 13.220.40; 29.020 ISBN 978-2-88912-027-7
– 2 – 60695-1-11 © IEC:2010
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 .14
5 Fire hazard tests .15
6 The fire hazard assessment process .15
6.1 General .15
6.2 Definition of the product range and the circumstances of use .16
6.3 Identification and analysis of fire scenarios .16
6.3.1 General .16
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 .19
6.5 Performance requirements .20
6.6 Interpretation of test results.20
6.7 Consequential testing.20
7 Scope and limitations of the fire hazard assessment .20
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 .26
Annex B (informative) Use of rigid plastic conduit – A fire hazard assessment .31
Bibliography.43

Figure B.1 – Schematic of conduit installation.38
Figure B.2 – Corridor upper layer temperature (concrete wall) .38
Figure B.3 – Corridor upper layer temperature (gypsum wall board).39
Figure B.4 – Flux measured at the conduit 2 m away (concrete wall) .39
Figure B.5 – Flux measured at the conduit 2 m away (gypsum wall).40
Figure B.6 – Comparative mass loss rates of furniture and conduit (concrete wall) .40
Figure B.7 – Comparative mass loss rates of furniture and conduit (gypsum wall board).41
Figure B.8 – Relative increase of toxicity due to exposed conduit (concrete wall) .41
Figure B.9 – Relative increase of toxicity due to exposed conduit (gypsum wall board) .42

Table A.1 – Irritant F values and calculated X values for the defined fire scenario .27
Table A.2 – Asphyxiant X values calculated for the defined fire scenario.28
Table A.3 – Incapacitation times for hydrogen cyanide.29

60695-1-11 © IEC:2010 – 3 –
Table A.4 – Multiplication factors for carbon dioxide .30
Table B.1 – Summary of fire scenario information .33
Table B.2 – Time of occurrence of highly-hazardous conditions in building corridors.36

– 4 – 60695-1-11 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 1-11: Guidance for assessing
the fire hazard of electrotechnical products –
Fire hazard assessment
FOREWORD
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International Standard IEC 60695-1-11 has been prepared by IEC technical committee 89:
Fire hazard testing.
This first edition of this standard, together with IEC 60695-1-10, cancels and replaces the
third edition of IEC 60695-1-1 published in 1999, and corrigenda 1 and 2 (2000). It also
constitutes a technical revision.
It has the status of a basic safety publication in accordance with IEC Guide 104 and
ISO/IEC Guide 51.
.
This standard is to be us
...