IEC 60794-2-50:2023
(Main)Optical fibre cables - Part 2-50: Indoor cables - Family specification for simplex and duplex cables for use in terminated cable assemblies
Optical fibre cables - Part 2-50: Indoor cables - Family specification for simplex and duplex cables for use in terminated cable assemblies
IEC 60794-2-50:2023 specifies requirements for simplex and duplex optical fibre cables for use in terminated cable assemblies or as used for termination of passive components. This third edition cancels and replaces the second edition published in 2020. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) added IEC 60793-1-46 and IEC 60794-1-211 to the normative references;
b) changed the load duration for the tensile test from 5 min to 10 min;
c) clarified the distance between the clamps for torsion test to 125 times cable diameter, but not less than 0,3 m;
d) recommended the temperatures –10 °C and +60 °C for indoor simplex and duplex cables and included the low and high temperatures for category C, CHD, OP and OPHD according to the operating service environments in IEC 61753-1 for temperature cycling and shrinkage testing;
e) updated the shrinkage test standard to IEC 60794-1-211, F11A, and changed the requirement to maximum 20 mm;
f) replaced the text for the fire performance with an improved description.
Câbles à fibres optiques - Partie 2-50: Câbles intérieurs - Spécification de famille pour les câbles simplex et duplex utilisés dans les câbles assemblés équipés
L'IEC 60794-2-50:2023 spécifie les exigences pour les câbles simplex et duplex à fibres optiques utilisés dans des câbles assemblés équipés ou comme terminaison pour des composants passifs.Cette troisième édition annule et remplace la deuxième édition parue en 2020. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) ajout de l’IEC 60793-1-46 et de l’IEC 60794-1-211 dans les références normatives;
b) modification de la durée d’application des charges pour l’essai de traction qui est portée de 5 min à 10 min;
c) clarification de la distance entre les pinces pour l’essai de torsion de 125 fois le diamètre du câble, mais pas moins de 0,3 m;
d) recommandation des températures –10 °C et +60 °C pour les câbles intérieurs simplex et duplex et inclusion des températures hautes et basses pour les catégories C, CHD, OP et OPHD conformément aux environnements de service ou de fonctionnement de l’IEC 617531 pour les essais de cycles de température et de rétraction;
e) mise à jour de la norme d’essai de rétraction conformément à l’IEC 60794-1-211, F11A, et modification de l’exigence à 20 mm au maximum;
f) remplacement du texte du comportement au feu par une description améliorée.
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IEC 60794-2-50 ®
Edition 3.0 2023-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibre cables –
Part 2-50: Indoor cables – Family specification for simplex and duplex cables for
use in terminated cable assemblies
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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International Standards for all electrical, electronic and related technologies.
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IEC 60794-2-50 ®
Edition 3.0 2023-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibre cables –
Part 2-50: Indoor cables – Family specification for simplex and duplex cables for
use in terminated cable assemblies
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.10 ISBN 978-2-8322-6746-2
– 2 – IEC 60794-2-50:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Construction . 8
4.1 General . 8
4.2 Optical fibres and primary coating . 8
4.3 Buffer . 8
4.4 Tube . 9
4.5 Strength and anti-buckling members . 9
4.6 Sheath . 9
4.7 Sheath marking . 9
4.8 Examples of cable constructions . 9
5 Tests . 10
5.1 General . 10
5.2 Dimensions . 10
5.3 Mechanical requirements . 11
5.3.1 Tensile performance . 11
5.3.2 Crush . 11
5.3.3 Impact . 12
5.3.4 Repeated bending . 12
5.3.5 Bend . 12
5.3.6 Torsion . 13
5.3.7 Bend at low temperature . 13
5.3.8 Kink . 14
5.3.9 Sheath pull-off force . 14
5.3.10 Abrasion resistance of cable marking . 14
5.3.11 Buffered fibre movement under compression . 14
5.4 Environmental requirements . 15
5.4.1 Temperature cycling . 15
5.4.2 Sheath shrinkage (informative) . 16
6 Transmission requirements . 17
7 Fire performance . 17
Annex A (informative) Examples of types of cable constructions . 18
Annex B (informative) Guidance on the selection of tests applicable to optical fibre
cables for use in patchcords terminated cable assemblies . 24
Bibliography . 27
Figure A.1 – Simplex loose non-buffered fibre cable .
Figure A.2 – Simplex fibre cable .
Figure A.3 – Duplex loose non-buffered fibre cable .
Figure A.4 – Duplex fibre cable .
Figure A.5 – Duplex fibre zip cord .
Figure A.6 – Duplex flat cable .
Figure A.7 – Duplex round cable (breakout cable) .
Figure A.1 – Simplex non-buffered cable . 21
Figure A.2 – Simplex cable . 21
Figure A.3 – Duplex non-buffered cable . 21
Figure A.4 – Duplex cable . 22
Figure A.5 – Duplex zip cord cable . 22
Figure A.6 – Duplex flat cable . 23
Figure A.7 – Duplex round cable (breakout cable) . 23
Table 1 – Outer dimensions of buffered fibres . 9
Table 2 – Temperature cycling ranges according to the application environment.
Table 2 – Preferred low and high temperatures . 16
Table B.1 – Cable test method summary . 24
Table B.2 – Blank detail specification for cable testing agreement . 26
– 4 – IEC 60794-2-50:2023 RLV © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 2-50: Indoor cables – Family specification for simplex
and duplex cables for use in terminated cable assemblies
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.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 60794-2-50:2020. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
IEC 60794-2-50 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical
committee 86: Fibre optics. It is an International Standard.
This third edition cancels and replaces the second edition published in 2020. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) added IEC 60793-1-46 and IEC 60794-1-211 to the normative references;
b) changed the load duration for the tensile test from 5 min to 10 min;
c) clarified the distance between the clamps for torsion test to 125 times cable dia
...
IEC 60794-2-50 ®
Edition 3.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 2-50: Indoor cables – Family specification for simplex and duplex cables for
use in terminated cable assemblies
Câbles à fibres optiques –
Partie 2-50: Câbles intérieurs – Spécification de famille pour les câbles simplex
et duplex utilisés dans les câbles assemblés équipés
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
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The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
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If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
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IEC 60794-2-50 ®
Edition 3.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 2-50: Indoor cables – Family specification for simplex and duplex cables for
use in terminated cable assemblies
Câbles à fibres optiques –
Partie 2-50: Câbles intérieurs – Spécification de famille pour les câbles simplex
et duplex utilisés dans les câbles assemblés équipés
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-6711-0
– 2 – IEC 60794-2-50:2023 © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Construction . 8
4.1 General . 8
4.2 Optical fibres and primary coating . 8
4.3 Buffer . 8
4.4 Tube . 9
4.5 Strength and anti-buckling members . 9
4.6 Sheath . 9
4.7 Sheath marking . 9
4.8 Examples of cable constructions . 9
5 Tests . 10
5.1 General . 10
5.2 Dimensions . 10
5.3 Mechanical requirements . 11
5.3.1 Tensile performance . 11
5.3.2 Crush . 11
5.3.3 Impact . 12
5.3.4 Repeated bending . 12
5.3.5 Bend . 12
5.3.6 Torsion . 13
5.3.7 Bend at low temperature . 13
5.3.8 Kink . 14
5.3.9 Sheath pull-off force . 14
5.3.10 Abrasion resistance of cable marking . 14
5.3.11 Buffered fibre movement under compression . 14
5.4 Environmental requirements . 15
5.4.1 Temperature cycling . 15
5.4.2 Sheath shrinkage . 15
6 Transmission requirements . 16
7 Fire performance . 16
Annex A (informative) Examples of cable constructions . 17
Annex B (informative) Guidance on the selection of tests applicable to optical fibre
cables for use in terminated cable assemblies . 20
Bibliography . 23
Figure A.1 – Simplex non-buffered cable . 17
Figure A.2 – Simplex cable . 17
Figure A.3 – Duplex non-buffered cable . 18
Figure A.4 – Duplex cable . 18
Figure A.5 – Duplex zip cord cable . 18
Figure A.6 – Duplex flat cable . 19
Figure A.7 – Duplex round cable (breakout cable) . 19
Table 1 – Outer dimensions of buffered fibres . 9
Table 2 – Preferred low and high temperatures . 15
Table B.1 – Cable test method summary . 20
Table B.2 – Blank detail specification for cable testing agreement . 22
– 4 – IEC 60794-2-50:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 2-50: Indoor cables – Family specification for simplex
and duplex cables for use in terminated cable assemblies
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 t
...
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