IEC 60695-1-21:2016
(Main)Fire hazard testing - Part 1-21: Guidance for assessing the fire hazard of electrotechnical products - Ignitability - Summary and relevance of test methods
Fire hazard testing - Part 1-21: Guidance for assessing the fire hazard of electrotechnical products - Ignitability - Summary and relevance of test methods
IEC 60695-1-21:2016 provides a summary of test methods that are used to determine the ignitability of electrotechnical products or materials from which they are formed. It also includes test methods in which, by design, ignitability is a significant quantifiable characteristic. It represents the current state of the art of the test methods and, where available, includes special observations on their relevance and use. The list of test methods is not to be considered exhaustive, and test methods which were not developed by the IEC are not to be considered as endorsed by the IEC unless this is specifically stated. This basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with IEC Guide 104 and ISO/IEC Guide 51. It is not intended for use by manufacturers or certification bodies. This first edition of IEC 60695-1-21 cancels and replaces the first edition of IEC TR 60695-1-21 published in 2008. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Change from a TR to an international standard;
- Modified Introduction;
- Modified Scope;
- Updated normative references;
- Updated terms and definitions;
- Updates and new text in Clause 4;
- Addition of text concerning ASTM D 3638;
- Updates to Annex A and Updates to the bibliography. Key words: Fire Hazard, Fire Safety Engineering, Ignitability.
Essais relatifs aux risques du feu - Partie 1-21: Lignes directrices pour l'évaluation des risques du feu des produits électrotechniques - Allumabilité - Résumé et pertinence des méthodes d'essais
L'IEC 60695-1-21:2016 donne un résumé des méthodes d'essai qui sont utilisées pour déterminer l'allumabilité des produits électrotechniques ou des matériaux à partir desquels ils sont fabriqués. Elle inclut également les méthodes d'essai pour lesquelles, par conception, l'allumabilité est une caractéristique quantifiable significative. Elle représente l'état de l'art de ces méthodes d'essai et, lorsque cela est applicable, inclut des observations spéciales concernant leur pertinence et leur utilisation. La liste des méthodes d'essai ne doit pas être considérée comme exhaustive et les méthodes d'essai qui n'ont pas été élaborées par l'IEC ne doivent pas être considérées comme étant entérinées par l'IEC sauf si cela est spécifiquement indiqué. La présente publication fondamentale de sécurité est destinée à être utilisée par les comités d'études pour l'élaboration de leurs normes conformément au IEC Guide 104 et dans le Guide ISO/IEC 51. Elle n'est pas destiné à l'usage par des fabricants ou par des organismes de certification. Cette première édition de l'IEC 60695-1-21 annule et remplace la première édition de l'IEC TR 60695-1-21 parue en 2008. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- Changement d'un TR à une norme internationale;
- Introduction modifiée;
- Domaine d'application modifié;
- Références normatives mises à jour;
- Termes et définitions mis à jour;
- Mises à jour et nouveau texte dans l'Article 4;
- Complément de texte concernant l'ASTM D 3638;
- Mises à jour de l'Annexe A et mises à jour de la bibliographie. Mots clés: Risques du feu, l'ingénierie de la sécurité incendie, Allumabilité
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IEC 60695-1-21 ®
Edition 1.0 2016-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 1-21: Guidance for assessing the fire hazard of electrotechnical products –
Ignitability – Summary and relevance of test methods
Essais relatifs aux risques du feu –
Partie 1-21: Lignes directrices pour l’évaluation des risques du feu des produits
électrotechniques – Allumabilité – Résumé et pertinence des méthodes d'essais
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IEC 60695-1-21 ®
Edition 1.0 2016-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Fire hazard testing –
Part 1-21: Guidance for assessing the fire hazard of electrotechnical products –
Ignitability – Summary and relevance of test methods
Essais relatifs aux risques du feu –
Partie 1-21: Lignes directrices pour l’évaluation des risques du feu des produits
électrotechniques – Allumabilité – Résumé et pertinence des méthodes d'essais
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.220.40, 29.020 ISBN 978-2-8322-3617-8
– 2 – IEC 60695-1-21:2016 IEC 2016
CONTENTS
FOREWORD .3
INTRODUCTION .5
1 Scope .7
2 Normative references .7
3 Terms and definitions .8
4 Summary of published test methods . 12
4.1 General . 12
4.2 Tests using heated air or electrical heating . 12
4.2.1 Determination of ignition temperature using a hot-air furnace, ISO 871 . 12
4.2.2 Differential scanning calorimetry (DSC), ISO 11357 [1] . 13
4.3 Tests using radiant heat . 14
4.3.1 Heat release rate – Cone calorimeter method, ISO 5660-1 [4] . 14
4.3.2 Heat release of insulating liquids, IEC TS 60695-8-3 [5] . 15
4.3.3 Standard test method for determining material ignition and flame
spread properties, ASTM E 1321 [6] . 16
4.3.4 Determination of the characteristic heat flux for ignition from a non-
contacting flame source, IEC TS 60695-11-11 [7] . 17
4.4 Oxygen index tests . 17
4.4.1 Oxygen index – Ambient temperature test, ISO 4589-2 [8] . 17
4.4.2 Oxygen index – Elevated temperature test, ISO 4589-3 [10] . 18
4.5 Glowing/hot-wire based test methods . 20
4.5.1 Glow wire tests, IEC 60695-2-11 [14], IEC 60695-2-12 [15] and
IEC 60695-2-13 [16] . 20
4.5.2 Hot wire coil ignitability test, IEC 60695-2-20 and ASTM D 3874 [17] . 22
4.6 Flame tests . 23
4.6.1 Needle flame test, IEC 60695-11-5 [18] . 23
4.6.2 50 W Horizontal and vertical flame test methods, IEC 60695-11-10 [19]
500 W flame test methods, IEC 60695-11-20 [20] . 24
4.6.3 1 kW nominal pre-mixed flame, IEC 60695-11-2 [23] . 25
4.6.4 Vertical and 60° tests for aircraft components, FAR 25 [25] . 25
4.7 Tests using an electrical arc . 26
4.7.1 Tracking index tests, IEC 60112 [26], ASTM D 3638 [27] . 26
4.7.2 High-Current Arc Ignition (HAI), UL 746A – Sec. 32 [30] . 28
4.7.3 High-voltage arc resistance to ignition (HVAR), UL 746A – Sec. 33 [31] . 28
Annex A (informative) Applicability of test methods . 30
A.1 Applicability of test methods . 30
Bibliography . 32
Table 1 – Main differences between IEC 60112 and ASTM D 3638 . 27
Table A.1 – Applicability of test methods (1 of 2) . 30
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIRE HAZARD TESTING –
Part 1-21: Guidance for assessing
the fire hazard of electrotechnical products –
Ignitability – Summary and relevance of test methods
FOREWORD
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