IEC 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 provides guidance on the ignitability of electrotechnical products and the materials from which they are formed. It gives guidance on the principles of ignitability; the selection of appropriate test methods and the use and interpretation of results. 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:
- ISO 5660-1 has been added to the normative references;
- definitions of pyrolysis and short-circuit have been added to Clause 3;
- some text from the introduction has been moved to Clause 5 and is now part of the normative text and Clause 5 now contains several mandatory statements. This part of IEC 60695 is intended for use by technical committees in preparation of standards in accordance with IEC Guide 104 and ISO/IEC Guide 51. Key words: Fire Hazard, Fire Test Method, Fire Safety Engineering, Ignitability.

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 au IEC Guide 104 et dans le Guide ISO/IEC 51. Mots clés: Risque du feu, Méthode d'essai du feu, Ingénierie de la sécurité incendie, Allumabilité

General Information

• Status: Published
• Publication Date: 26-Jan-2016
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: TC 89 - Fire hazard testing
• Drafting Committee: WG 12 - TC 89/WG 12
• Current Stage: PPUB - Publication issued
• Start Date: 15-Feb-2016
• Completion Date: 27-Jan-2016

Relations

• Replaces: IEC TS 60695-1-20:2008 - Fire hazard testing - Part 1-20: Guidance for assessing the fire hazard of electrotechnical products - Ignitability - General guidance
• Effective Date: 05-Sep-2023

Standards Content (Sample)

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

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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

– 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

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 1-20: Guidance for assessing the
fire hazard of electrotechnical products –
Ignitability – General guidance

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