ISO 14624-2:2023

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 14624-2
ISO/TC 20/SC 14
Space systems — Safety and
Secretariat: ANSI
compatibility of materials —
Voting begins on:
2023-07-10
Part 2:
Voting terminates on:
Determination of flammability
2023-09-04
of electrical-wire insulation and
accessory materials
Systèmes spatiaux — Sécurité et compatibilité des matériaux —
Partie 2: Détermination de l'inflammabilité des systèmes d'isolation
des fils électriques, et des matériaux accessoires
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 14624-2:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

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ISO/FDIS 14624-2:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 14624-2
ISO/TC 20/SC 14
Space systems — Safety and
Secretariat: ANSI
compatibility of materials —
Voting begins on:
Part 2:
Voting terminates on:
Determination of flammability
of electrical-wire insulation and
accessory materials
Systèmes spatiaux — Sécurité et compatibilité des matériaux —
Partie 2: Détermination de l'inflammabilité des systèmes d'isolation
des fils électriques, et des matériaux accessoires
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: +41 22 749 01 11
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: copyright@iso.org
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 14624-2:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

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ISO/FDIS 14624-2:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test materials . 3
5 Electrical-wire insulation flammability test in a static environment (test A) .3
5.1 Principle . 3
5.2 Reagents . 3
5.3 Test system .
...

ISO/FDIS 14624-2:20222023(E)
2022-07-13
ISO/TC 20/SC 14
Secretariat: ANSI
2023-06-26
Space systems — Safety and compatibility of materials — Part 2: Determination of
flammability of electrical-wire insulation and accessory materials
Systèmes spatiaux — Sécurité et compatibilité des matériaux — Partie 1: Détermination de
l'inflammabilité verticale des matériaux

---------------------- Page: 1 ----------------------
ISO/FDIS 14624-2:2023(E)
© ISO 20222023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no
part of this publication may be reproduced or utilized otherwise in any form or by any means,
electronic or mechanical, including photocopying, or posting on the internet or an intranet, without
prior written permission. Permission can be requested from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 20222023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 14624-2:2023(E)
Contents Page
Foreword . iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test materials . 3
5 Electrical-wire insulation flammability test in a static environment (test A) . 3
5.1 Principle . 3
5.2 Reagents . 4
5.3 Test system . 4
5.4 Test specimens . 9
5.4.1 Reception and inspection of material . 9
5.4.2 Preparation of test specimens . 9
5.5 Procedure . 10
5.5.1 General . 10
5.5.2 Before testing . 10
5.5.3 Test . 10
5.6 Accuracy . 11
5.7 Test report. 11
5.7.1 Standard tests . 11
5.7.2 Non-standard tests . 12
5.8 Good laboratory practice (GLP) . 12
6 Alternative wire-insulation flammability test in a gas-flow environment (test B) .
...