Optical fibre cables - Part 3-70: Outdoor cables - Family specification for outdoor optical fibre cables for rapid/multiple deployment

IEC 60794-3-70:2021 is available as IEC 60794-3-70:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
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 disponible sous forme de IEC 60794-3-70:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
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.

General Information

Status
Published
Publication Date
06-Apr-2021
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
07-Apr-2021
Ref Project

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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
IEC 60794-3-70:2021-04(en)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2021 IEC, Geneva, Switzerland

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 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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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 once
and French, with equivalent terms in 18 additional languages.
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.
---------------------- Page: 2 ----------------------
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

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 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

---------------------- Page: 4 ----------------------
IEC 60794-3-70:2021 © IEC 2021 – 3 –
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.
---------------------- Page: 5 ----------------------
– 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.
---------------------- Page: 6 ----------------------
IEC 60794-3-70:2021 © IEC 2021 – 5 –
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 referenced document (including any

amendments) applies.

IEC 60793-2-10:2019, Optical fibres – Part 2-10: Product specifications – Sectional

specification for category A1 multimode fibres

IEC 60793-2-50:2019, Optical fibres – Part 2-50: Product specifications – Sectional

specification for class B single-mode fibres
IEC 60794-1-1, Optical fibre cables – Part 1-1: Generic specification – General

IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test

procedures – General guidance

IEC 60794-1-21:2015, Optical fibre cables – Part 1-21: Generic specification – Basic optical

cable test procedures – Mechanical tests methods
IEC 60794-1-21:2015/AMD1:2020

IEC 60794-1-22:2017, Optical fibre cables – Part 1-22: Generic specification – Basic optical

cable test procedures – Environmental tests methods

IEC 60794-1-23:2019, Optical fibre cables – Part 1-23: Generic specification – Basic optical

cable test procedures – Cable element test methods

IEC 60794-1-215, Optical fibre cables – Part 1-215: Generic specification – Basic optical cable

test procedures – Environmental test methods – Cable external freezing test, Method F15

IEC 60794-3, Optical fibre cables – Part 3: Outdoor cables – Sectional specification

ISO 4892-2, Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon-arc

lamps
3 Terms and definitions
No terms and definitions are listed in this document.
---------------------- Page: 7 ----------------------
– 6 – IEC 60794-3-70:2021 © IEC 2021

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 General requirements

The cable shall comply with the sectional specification, IEC 60794-3, and meet the

requirements which are defined in it.

The optical fibre contained in cables covered by this document shall comply with one of the

following standards, and meet the normative requirements defined within them as applicable:

• IEC 60793-2-10:2019, Annex A (multimode fibre sub-categories A1-OM2, A1-OM3, A1-

OM4, and A1-OM5, fibre models a and b);
• IEC 60793-2-10:2019, Annex B (multimode fibre sub-category A1-OM1);

• IEC 60793-2-50:2019, Annex A (single-mode fibre sub-category B-652.B and B-652.D);

• IEC 60793-2-50:2019, Annex F (single-mode fibre category B-657);
...

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
IEC 60794-3-70:2021-04(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2021 IEC, Geneva, Switzerland

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

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copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

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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.
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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.
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need further assistance, please contact the Customer Service
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---------------------- Page: 2 ----------------------
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

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 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

---------------------- Page: 4 ----------------------
IEC 60794-3-70:2021 © IEC 2021 – 3 –
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.
---------------------- Page: 5 ----------------------
– 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.
---------------------- Page: 6 ----------------------
IEC 60794-3-70:2021 © IEC 2021 – 5 –
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 referenced document (including any

amendments) applies.

IEC 60793-2-10:2019, Optical fibres – Part 2-10: Product specifications – Sectional

specification for category A1 multimode fibres

IEC 60793-2-50:2019, Optical fibres – Part 2-50: Product specifications – Sectional

specification for class B single-mode fibres
IEC 60794-1-1, Optical fibre cables – Part 1-1: Generic specification – General

IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test

procedures – General guidance

IEC 60794-1-21:2015, Optical fibre cables – Part 1-21: Generic specification – Basic optical

cable test procedures – Mechanical tests methods
IEC 60794-1-21:2015/AMD1:2020

IEC 60794-1-22:2017, Optical fibre cables – Part 1-22: Generic specification – Basic optical

cable test procedures – Environmental tests methods

IEC 60794-1-23:2019, Optical fibre cables – Part 1-23: Generic specification – Basic optical

cable test procedures – Cable element test methods

IEC 60794-1-215, Optical fibre cables – Part 1-215: Generic specification – Basic optical cable

test procedures – Environmental test methods – Cable external freezing test, Method F15

IEC 60794-3, Optical fibre cables – Part 3: Outdoor cables – Sectional specification

ISO 4892-2, Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon-arc

lamps
3 Terms and definitions
No terms and definitions are listed in this document.
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ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 General requirements

The cable shall comply with the sectional specification, IEC 60794-3, and meet the

requirements which are defined in it.

The optical fibre contained in cables covered by this document shall comply with one of the

following standards, and meet the normative requirements defined within them as applicable:

• IEC 60793-2-10:2019, Annex A (multimode fibre sub-categories A1-OM2, A1-OM3, A1-

OM4, and A1-OM5, fibre models a and b);
• IEC 60793-2-10:2019, Annex B (multimode fibre sub-category A1-OM1);

• IEC 60793-2-50:2019, Annex A (single-mode fibre sub-category B-652.B and B-652.D);

• IEC 60793-2-50:2019, Annex F (single-mode fibre category B-657);

To enable compatibility with ISO/IEC 11801-1, optical performance level requirements are

presented in terms of the performance classification codes as follows:

• OS1a: single-mode fibre, sub-categories B-652.D, B-657.A1, B-657.A2, B-657.B2 and

B-657.B3;

• OS2: single-mode fibre, sub-categories B-652.D, B-657.A1, B-657.A2, B-657.B2 and

B-657.B3;
• OM3: multimode fibre, models A1-OM3a and A1-OM3b;
• OM4: multimode fibre, models A1-OM4a and A1-OM4b;
• OM5: multimode fibre, models A1-OM5a and A1-OM5b.

NOTE These codes are informative from the perspective of the requirements defined in this document.

5 Specification for outdoor optical fibre cables for rapid/multiple deployment
5.1 Construction
5.1.1 General

In addition to the construction requirements of IEC 60794-3, where applicable, the following

considerations apply to outdoor optical fibre cables for rapid/multiple deployment.

Rapid/multiple deployment optical fibre cables are designed to be used in un-protected outdoor

terrestrial environments thereby requiring enhanced mechanical, environmental and ingress

performance.

A blank detail specification for outdoor optical fibre cables for rapid/multiple deployment is

provided in Annex A.
5.1.2 Rapid/multiple deployment optical fibre cables

Rapid/multiple deployment optical fibre cables are suitable for use by manual or mechanically

assisted deployment. They are differentiated from other outdoor optical fibre cables due to:

• repeated deployment/installation;
• unprotected working environment;
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IEC 60794-3-70:2021 © IEC 2021 – 7 –
• often stored on relatively small diameter drums;
• uncontrolled or non-regulated cable route.

All the above, as well as additional factors, require these cables to have enhanced mechanical

(i.e. tensile, crush, bend radius, torsion, abrasion, kink, memory) environmental (i.e.

temperature, UV resistance, cold-bend) and ingress (i.e. fuel, solvent and oil resistance,

waterblocking) performance over the cable's lifetime. These shall be incorporated into the

cable's design.
5.2 Optical fibres

For the purposes of this document, supported optical fibres are those detailed in Clause 4.

There shall be no fibre splice in a delivered length unless otherwise agreed by customer and

supplier.

It shall be possible to identify each individual fibre throughout the length of the cable.

Transmission performance of the cabled optical fibres shall be in accordance with

IEC 60794-1-1.
5.3 Secondary coating

Although the different recognized secondary coatings detailed in IEC 60794-3 (tight buffer,

tube, ribbon, slotted core, etc.) are supported by this document, the type of secondary coating,

materials and dimensions shall be as required by the cable detail specification.

NOTE Both laboratory testing as well as field use have demonstrated the tight buffer to be most optimized to meet

all the relevant performance test requirements detailed in Clause 6.
5.4 Outer sheath

The cable shall have a seamless sheath made of a UV-stabilised weather-resistant polymeric

compound, unless otherwise agreed between the customer and supplier.

The sheath thickness and cable overall diameter and its variations shall take into account the

operating conditions and shall be determined by agreement between the customer and supplier.

5.5 Mechanical and environmental tests

Based on the expected operating conditions over the life of the product, including the

mechanical loads exerted on the product during deployment and operation, Clause 6 specifies

product performance for rapid/multiple deployment optical fibre cables. Unless otherwise

specified, the installation temperature range shall be: –40 ºC to +70 ºC.
6 Testing of rapid/multiple deployment optical fibre cables
6.1 General

Some of the tests detailed in Table 1 below may not be applicable to certain cable designs and

intended applications. For further guidance on the applicability of test methods and frequency

of testing, see IEC 60794-1-1.

Tests on single-mode fibre cables are typically carried out at 1 550 nm. Multimode fibre cables

are typically tested at 1 300 nm. Measurements at other wavelengths or range of wavelengths

can be agreed upon between the customer and supplier.
6.2 Applicable tests
See Table 1.
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Table 1 – Tests applicable for mechanical and environmental performance
of a rapid/multiple deployment optical fibre cable
Characteristic Family Test method Remark
requirement
Tensile performance 6.3 IEC 60794-1-21
method E1
Abrasion 6.4 IEC 60794-1-21
method E2A
Crush 6.5 IEC 60794-1-21
method E3
Impact 6.6 IEC 60794-1-21
method E4
Ribbon stripping 6.7 IEC 60794-1-23 If ribbons are used
method G10B
Repeated bending 6.8 IEC 60794-1-21
method E6
Torsion 6.9 IEC 60794-1-21
method E7
Flexing 6.10 IEC 60794-1-21
method E8
Kink 6.11 IEC 60794-1-21
method E10
IEC 60794-1-21
Bend 6.12
method E11A
Bending under tension 6.13 IEC 60794-1-21
method E18A
Multiple cable coiling and uncoiling 6.14 IEC 60794-1-21
performance Method E33
Temperature cycling 6.15 IEC 60794-1-22
Method F1
Water penetration 6.16 IEC 60794-1-22
Method F5B/F5C
Ageing 6.17 IEC 60794-1-22
Method F9
UV resistance 6.18 IEC 60794-1-22
Method F14
External freezing 6.19 IEC 60794-1-215
Method F15A
Separability of individual fibres from 6.20 IEC 60794-1-23 If ribbons are used
ribbon Method G5
Tube kinking 6.21 IEC 60794-1-23 If loose tubes are used
Method G7
IEC 60811-404 may be
Fuel solvent resistance
applicable
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IEC 60794-3-70:2021 © IEC 2021 – 9 –
6.3 Tensile performance
a) Family requirements

For some of the parameters specified, the objective is a level of strain that will not

compromise fibre mechanical reliability. For 1 % proof-tested fibres, the fibre strain under

long term tensile load (T ) shall not exceed 20 % of this fibre proof strain (equal to absolute

0,2 % strain) and there shall be no change in attenuation during the test. Under short term

), the fibre strain shall not exceed 60 % of the fibre proof strain and the
tensile load (T

attenuation change during test shall be measured and recorded. Other criteria may be

agreed between the customer and the supplier. For fibres proof tested at higher levels, the

safe long-term load will not scale linearly with proof strain, so a lower percentage of the

proof strain is applicable. For greater than 1 % up to 2 % proof-tested fibres, fibre strain at

shall be limited to 17 % of the proof-test strain (equal to absolute 0,34 % strain for 2 %

proof tested fibres).
b) Test conditions
Method: IEC 60794-1-21, method E1

Tensile short-term load on cable: 2 700 N or 1 × the weight of 1,0 km length of cable in

N, the smaller of the two.
NOTE Other tensile loads can be agreed between customer and supplier.
6.4 Abrasion
a) Family requirements

There shall be no perforation of the sheath after performing 100 cycles. Other criteria may

be agreed between customer and supplier.
b) Test conditions
Method: IEC 60794-1-21, method E2A
Applied force: 7 N
Diameter of needle: 1,0 mm
6.5 Crush
a) Family requirements

After removal of the short-term load, there shall be no change in attenuation. Under visual

examination, there shall be no damage to the sheath or to the cable elements. The imprint

of the plate or mandrel on the cable is not considered mechanical damage.
b) Test conditions
Method: IEC 60794-1-21, method E3A
Short-term load (plate/plate): 8 000 N
Duration of load: 1 min
NOTE Other compression loads can be agreed between customer and supplier.
6.6 Impact
a) Family requirements

Under visual examination without magnification, there shall be no damage to the sheath or

to the cable elements. The imprint of the striking surface on the sheath is not considered

mechanical damage.
b) Test conditions
Method: IEC 60794-1-21, Method E4
Number of impacts: One in 3 different places spaced not less than
500 mm apart
Striking surface curvature radius: 300 mm
Impact energy: 22 J
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NOTE Other impact energies can be agreed between customer and supplier.
6.7 Ribbon strippability
a) Family requirements

At least 25 mm of the ribbon matrix and the fibres’ protective coatings shall be removable

with commercially available stripping tools with no fibre breakage. Any remaining coating

residue shall be readily removable using isopropyl alcohol wipes.
b) Test conditions
Method: IEC 60794-1-23, Method G10B
6.8 Repeated bending
a) Family requirements

Under visual examination without magnification, there shall be no damage to the sheath and

to the cable elements.
There shall be no change in attenuation after the test.
b) Test conditions
Method: IEC 60794-1-21, method E6
Bending diameter: 10 × d
Load: Adequate to ensure uniform contact with the mandrel
Number of cycles: 1 000
6.9 Torsion
a) Family requirements

Under visual examination without magnification, there shall be no damage to the sheath or

to the cable elements.
There shall be no change in attenuation after the test.
b) Test conditions
Method: IEC 60794-1-21, method E7
Length under test: 125 × d
Number of cycles: 10
NOTE Other lengths can be agreed between customer and supplier.
6.10 Flexing
a) Family requirements
Under visual examination without magnification, there shall be no dam
...

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