IEC 60794-3-70:2021
(Main)Optical fibre cables - Part 3-70: Outdoor cables - Family specification for outdoor optical fibre cables for rapid/multiple deployment
Optical fibre cables - Part 3-70: Outdoor cables - Family specification for outdoor optical fibre cables for rapid/multiple deployment
IEC 60794-3-70:2021 covers outdoor optical fibre cables intended for rugged terrestrial rapid/multiple deployment. These cables, with enhanced mechanical, environmental and ingress performance can be used wherever a rapid or multiple deployment is relevant (e.g. mobile broadcast units, emergency rescue services, tactical ground-forces, outdoor motion-robotics, mining machinery, temporary repair cables for damaged links, etc.). This second edition cancels and replaces the first edition published in 2016. It constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
- incorporation of the new classification system for optical fibre categories, sub-categories in IEC 60793-2-10;
- incorporation of the new classification system for optical fibre categories, sub-categories and models in IEC 60793-2-50;
- updating of cabled fibre performance categories in alignment with ISO/IEC 11801-1;
- updating of bibliographical references.
Câbles à fibres optiques - Partie 3-70 : Câbles extérieurs - Spécification de famille pour câbles à fibres optiques extérieurs pour déploiement rapide/multiple
IEC 60794-3-70:2021 est une spécification de famille qui couvre les câbles à fibres optiques extérieurs destinés à un déploiement rapide/multiple terrestre renforcé. Ces câbles, dont les performances mécaniques, environnementales et d’infiltration sont améliorées, peuvent être utilisés partout où un déploiement rapide ou multiple est applicable (par exemple, dans des unités mobiles de diffusion, des services de secours d’urgence, des forces terrestres tactiques, des robots mobiles extérieurs, des engins d’exploitation minière, des câbles de réparation temporaire pour liaisons endommagées, etc.). Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) incorporation du nouveau système de classification pour les catégories et sous-catégories de fibres optiques de l’IEC 60793-2-10;
b) incorporation du nouveau système de classification pour les catégories, sous-catégories et modèles de fibres optiques de l’IEC 60793-2-50.
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IEC 60794-3-70 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
Optical fibre cables –
Part 3-70: Outdoor cables – Family specification for outdoor optical fibre cables
for rapid/multiple deployment
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.
IEC Central Office 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.
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IEC 60794-3-70 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
Optical fibre cables –
Part 3-70: Outdoor cables – Family specification for outdoor optical fibre cables
for rapid/multiple deployment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.01; 33.180.10 ISBN 978-2-8322-9655-4
– 2 – IEC 60794-3-70:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 6
5 Specification for outdoor optical fibre cables for rapid/multiple deployment . 6
5.1 Construction . 6
5.1.1 General . 6
5.1.2 Rapid/multiple deployment optical fibre cables. 6
5.2 Optical fibres . 7
5.3 Secondary coating . 7
5.4 Outer sheath . 7
5.5 Mechanical and environmental tests . 7
6 Testing of rapid/multiple deployment optical fibre cables . 7
6.1 General . 7
6.2 Applicable tests . 7
6.3 Tensile performance . 9
6.4 Abrasion . 9
6.5 Crush . 9
6.6 Impact. 9
6.7 Ribbon strippability . 10
6.8 Repeated bending . 10
6.9 Torsion . 10
6.10 Flexing . 10
6.11 Kink . 11
6.12 Bend . 11
6.13 Bending under tension . 11
6.14 Multiple cable coiling and uncoiling performance. 11
6.15 Temperature cycling . 12
6.16 Water penetration . 12
6.17 Ageing . 12
6.18 UV resistance . 12
6.19 External freezing . 13
6.20 Fibre ribbon separability . 13
6.21 Tube kinking . 13
Annex A (normative) Blank detail specification and minimum requirements . 14
Bibliography . 15
Table 1 – Tests applicable for mechanical and environmental performance of a
rapid/multiple deployment optical fibre cable . 8
Table A.1 – Cable description . 14
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 3-70: Outdoor cables – Family specification for outdoor optical
fibre cables for rapid/multiple deployment
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.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
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.
IEC 60794-3-70 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical
committee 86: Fibre optics. It is an International Standard.
This second edition cancels and replaces the first edition published in 2016. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) incorporation of the new classification system for optical fibre categories, sub-categories in
IEC 60793-2-10;
b) incorporation of the new classification system for optical fibre categories, sub-categories
and models in IEC 60793-2-50;
c) updating of cabled fibre performance categories in alignment with ISO/IEC 11801-1;
d) updating of bibliographical references.
– 4 – IEC 60794-3-70:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
86A/2086/FDIS 86A/2091/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
This International Standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2 and
IEC 60794-3.
A list of all parts in the IEC 60794 series, published under the general title Optical fibre cables,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
OPTICAL FIBRE CABLES –
Part 3-70: Outdoor cables – Family specification for outdoor optical
fibre cables for rapid/multiple deployment
1 Scope
This part of IEC 60794 is a family specification that covers outdoor optical fibre cables intended
for rugged terrestrial rapid/multiple deployment. These cables, with enhanced mechanical,
environmental and ingress performance can be used wherever a rapid or multiple deployment
is relevant (e.g. mobile broadcast units, emergency rescue services, tactical ground-forces,
outdoor motion-robotics, mining machinery, temporary repair cables for damaged links, etc.).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the
...
IEC 60794-3-70 ®
Edition 2.0 2021-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibre cables –
Part 3-70: Outdoor cables – Family specification for outdoor optical fibre cables
for rapid/multiple deployment
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.
IEC Central Office 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 online collection - oc.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
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC 60794-3-70 ®
Edition 2.0 2021-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibre cables –
Part 3-70: Outdoor cables – Family specification for outdoor optical fibre cables
for rapid/multiple deployment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.01; 33.180.10 ISBN 978-2-8322-9689-9
– 2 – IEC 60794-3-70:2021 RLV © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 General requirements . 6
5 Specification for outdoor optical fibre cables for rapid/multiple deployment . 7
5.1 Construction . 7
5.1.1 General . 7
5.1.2 Rapid/multiple deployment optical fibre cables. 7
5.2 Optical fibres . 7
5.3 Secondary coating . 7
5.4 Outer sheath . 8
5.5 Mechanical and environmental tests . 8
6 Testing of rapid/multiple deployment optical fibre cables . 8
6.1 General . 8
6.2 Applicable tests . 8
6.3 Tensile performance . 9
6.4 Abrasion . 9
6.5 Crush . 9
6.6 Impact. 10
6.7 Ribbon strippability . 10
6.8 Repeated bending . 10
6.9 Torsion . 10
6.10 Flexing . 11
6.11 Kink . 11
6.12 Bend . 11
6.13 Bending under tension . 11
6.14 Multiple cable coiling and uncoiling performance. 12
6.15 Temperature cycling . 12
6.16 Water penetration . 12
6.17 Ageing . 13
6.18 UV resistance . 13
6.19 External freezing . 13
6.20 Fibre ribbon separability . 13
6.21 Tube kinking . 13
Annex A (normative) Blank detail specification and minimum requirements . 14
Bibliography . 15
Table 1 – Tests applicable for mechanical and environmental performance of a
rapid/multiple deployment optical fibre cable . 8
Table A.1 – Cable description . 14
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 3-70: Outdoor cables – Family specification for outdoor optical
fibre cables for rapid/multiple deployment
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.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
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 60794-3-70:2016. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.
– 4 – IEC 60794-3-70:2021 RLV © IEC 2021
IEC 60794-3-70 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical
committee 86: Fibre optics. It is an International Standard.
This second edition cancels and replaces the first edition published in 2016. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) incorporation of the new classification system for optical fibre categories, sub-categories in
IEC 60793-2-10;
b) incorporation of the new classification system for optical fibre categories, sub-categories
and models in IEC 60793-2-50;
c) updating of cabled fibre performance categories in alignment with ISO/IEC 11801-1;
d) updating of bibliographical references.
The text of this International Standard is based on the following documents:
FDIS Report on voting
86A/2086/FDIS 86A/2091/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
This International Standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2 and
IEC 60794-3.
A list of all parts in the IEC 60794 series, published under the general title Optical fibre cables,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
OPTICAL FIBRE CABLES –
Part 3-70: Outdoor cables – Family specification for outdoor optical
fibre cables for rapid/multiple deployment
1 Scope
This part of IEC 60794 is a family specification that covers outdoor optical fibre cables intended
for rugged terrestr
...
IEC 60794-3-70 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 3-70: Outdoor cables – Family specification for outdoor optical fibre cables
for rapid/multiple deployment
Câbles à fibres optiques –
Partie 3-70: Câbles extérieurs – Spécification de famille pour câbles à fibres
optiques extérieurs pour déploiement rapide/multiple
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.
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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 Central Office 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 online collection - oc.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
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
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 60794-3-70 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 3-70: Outdoor cables – Family specification for outdoor optical fibre cables
for rapid/multiple deployment
Câbles à fibres optiques –
Partie 3-70: Câbles extérieurs – Spécification de famille pour câbles à fibres
optiques extérieurs pour déploiement rapide/multiple
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.01; 33.180.10 ISBN 978-2-8322-1016-9
– 2 – IEC 60794-3-70:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 6
5 Specification for outdoor optical fibre cables for rapid/multiple deployment . 6
5.1 Construction . 6
5.1.1 General . 6
5.1.2 Rapid/multiple deployment optical fibre cables. 6
5.2 Optical fibres . 7
5.3 Secondary coating . 7
5.4 Outer sheath . 7
5.5 Mechanical and environmental tests . 7
6 Testing of rapid/multiple deployment optical fibre cables . 7
6.1 General . 7
6.2 Applicable tests . 7
6.3 Tensile performance . 9
6.4 Abrasion . 9
6.5 Crush . 9
6.6 Impact. 9
6.7 Ribbon strippability . 10
6.8 Repeated bending . 10
6.9 Torsion . 10
6.10 Flexing . 10
6.11 Kink . 11
6.12 Bend . 11
6.13 Bending under tension . 11
6.14 Multiple cable coiling and uncoiling performance. 11
6.15 Temperature cycling . 12
6.16 Water penetration . 12
6.17 Ageing . 12
6.18 UV resistance . 12
6.19 External freezing . 13
6.20 Fibre ribbon separability . 13
6.21 Tube kinking . 13
Annex A (normative) Blank detail specification and minimum requirements . 14
Bibliography . 15
Table 1 – Tests applicable for mechanical and environmental performance of a
rapid/multiple deployment optical fibre cable . 8
Table A.1 – Cable description . 14
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 3-70: Outdoor cables – Family specification for outdoor optical
fibre cables for rapid/multiple deployment
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
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IEC 60794-3-70 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical
committee 86: Fibre optics. It is an International Standard.
This second edition cancels and replaces the first
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