IEC 60794-1-31:2018
(Main)Optical fibre cables - Part 1-31: Generic specification - Optical cable elements - Optical fibre ribbon
Optical fibre cables - Part 1-31: Generic specification - Optical cable elements - Optical fibre ribbon
IEC 60794-1-31:2018 which is a generic specification, covers optical fibre ribbons. Requirements which are described in this part apply to optical fibre ribbon cables for use with telecommunication equipment and devices employing similar techniques, in particular optical fibre cables in IEC 60794-2 for indoor use and in IEC 60794-3 for outdoor use. Detailed specifications for each application are given in IEC 60794-2 and IEC 60794-3.
Keywords: optical fibre ribbons
Câbles à fibres optiques – Partie 1-31: Spécification générique – Éléments de câbles optiques – Rubans de fibres optiques
IEC 60794-1-31: 2018 qui est une spécification générique, s’applique aux rubans de fibres optiques. Les exigences qui sont décrites dans la présente partie s'appliquent aux câbles à fibres optiques en ruban destinés à être utilisés dans les équipements de télécommunications et les dispositifs utilisant des techniques analogues, en particulier les câbles à fibres optiques de l'IEC 60794-2 pour une utilisation à l'intérieur et de l'IEC 60794-3 pour une utilisation à l’extérieur. Les spécifications détaillées pour chaque application sont données dans l'IEC 60794-2 et l'IEC 60794-3.
Mots clés : rubans de fibres optiques
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IEC 60794-1-31 ®
Edition 1.0 2018-05
INTERNATIONAL
STANDARD
colour
inside
Optical fibre cables –
Part 1-31: Generic specification – Optical cable elements – Optical fibre ribbon
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 60794-1-31 ®
Edition 1.0 2018-05
INTERNATIONAL
STANDARD
colour
inside
Optical fibre cables –
Part 1-31: Generic specification – Optical cable elements – Optical fibre ribbon
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.10, 33.180.99 ISBN 978-2-8322-5694-7
– 2 – IEC 60794-1-31:2018 © IEC 2018
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms, definitions, symbols and abbreviated terms . 5
4 Requirements . 6
4.1 General . 6
4.2 Construction . 6
4.2.1 Ribbon structure . 6
4.2.2 Optical fibres . 7
4.3 Dimensions . 7
4.4 Mechanical requirements . 9
4.4.1 General . 9
4.4.2 Separability of individual fibres from a ribbon. 10
4.4.3 Ribbon stripping . 10
4.4.4 Torsion . 10
4.5 Identification of ribbon . 10
4.5.1 General . 10
4.5.2 Identification by positional identification . 10
4.5.3 Identification by ribbon coding and fibre colouring . 11
Figure 1 – Cross-section of a typical edge-bonded ribbon (thinner ribbon) . 6
Figure 2 – Cross-section of a typical encapsulated ribbon (thicker ribbon) . 7
Figure 3 – Overview of a typical partially-bonded ribbon . 7
Figure 4 – Example of cross-sectional drawing illustrating fibre ribbon geometry
(4-fibre ribbon) . 9
Figure 5 – Example of identification by means of colour coding and positioning . 11
Table 1 – Maximum dimensions of optical fibre ribbons for a typical 250 µm coating fibre . 8
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 1-31: Generic specification –
Optical cable elements – Optical fibre ribbon
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.
International Standard IEC 60794-1-31 has been prepared by subcommittee SC86A: Fibres
and cables, of IEC technical committee 86: Fibre optics.
The text of this International Standard is based on the following documents:
CDV Report on voting
86A/1806/CDV 86A/1840/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
– 4 – IEC 60794-1-31:2018 © IEC 2018
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 "http://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.
A bilingual version of this publication may be issued at a later date.
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 1-31: Generic specification –
Optical cable elements – Optical fibre ribbon
1 Scope
This part of IEC 60794, which is a generic specification, covers optical fibre ribbons.
Requirements which are described in this part apply to optical fibre ribbon cables for use with
telecommunication equipment and devices employing similar techniques, in particular optical
fibre cables in IEC 60794-2 for indoor use and in IEC 60794-3 for outdoor use. Detailed
specifications for each application are given in IEC 60794-2 and IEC 60794-3.
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 60304, Standard colours for insulation for low-frequency cables and wires
IEC 60793-2-10, Optical fibres – Part 2-10: Product specifications – Sectional specification for
category A1 multimode fibres
IEC 60793-2-50, 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 60794-1-23, Optical fibre cables – Part 1-23: Generic specification – Basic optical cable
test procedures – Cable element test methods
IEC 60794-2, Optical fibre cables – Part 2: Indoor cables – Sectional specification
IEC 60794-3, Optical fibre cables – Part 3: Outdoor cables – Sectional specification
3 Terms, definitions, symbols and abbreviated terms
For the purposes of this document, the terms, definitions, symbols and abbreviated terms
given in IEC 60794-1-1 apply.
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
– 6 – IEC 60794-1-31:2018 © IEC 2018
4 Requirements
4.1 General
Optical fibre ribbons are optical fibres which can be assembled in a composite linear array.
Fibres shall be arranged in parallel and formed into ribbons of typically four, six, eight, twelve,
sixteen, twenty-four or thirty-six fibres each according to user requirements, and shall be
capable of mass splicing.
Some parameters shall be measured in the ribbon since the corresponding tests on the
primary coated fibre or finished cable are not sufficient for complete characterization. These
parameters are identified below.
4.2 Construction
4.2.1 Ribbon structure
Ribbon structures are typically designated as edge-bonded, encapsulated or partially-bonded.
Edge-bonded and encapsulated structures are differentiated by the amount of buffering
afforded to the fibres by the bonding agent. The
...
IEC 60794-1-31 ®
Edition 1.0 2018-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 1-31: Generic specification – Optical cable elements – Optical fibre ribbon
Câbles à fibres optiques –
Partie 1-31: Spécification générique – Éléments de câbles optiques – Rubans de
fibres optiques
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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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 Electropedia - www.electropedia.org
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variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
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IEC 60794-1-31 ®
Edition 1.0 2018-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 1-31: Generic specification – Optical cable elements – Optical fibre ribbon
Câbles à fibres optiques –
Partie 1-31: Spécification générique – Éléments de câbles optiques – Rubans de
fibres optiques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10; 33.180.99 ISBN 978-2-8322-6564-2
– 2 – IEC 60794-1-31:2018 © IEC 2018
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms, definitions, symbols and abbreviated terms . 5
4 Requirements . 6
4.1 General . 6
4.2 Construction . 6
4.2.1 Ribbon structure . 6
4.2.2 Optical fibres . 7
4.3 Dimensions . 7
4.4 Mechanical requirements . 9
4.4.1 General . 9
4.4.2 Separability of individual fibres from a ribbon. 9
4.4.3 Ribbon stripping . 10
4.4.4 Torsion . 10
4.5 Identification of ribbon . 10
4.5.1 General . 10
4.5.2 Identification by positional identification . 10
4.5.3 Identification by ribbon coding and fibre colouring . 11
Figure 1 – Cross-section of a typical edge-bonded ribbon (thinner ribbon) . 6
Figure 2 – Cross-section of a typical encapsulated ribbon (thicker ribbon) . 7
Figure 3 – Overview of a typical partially-bonded ribbon . 7
Figure 4 – Example of cross-sectional drawing illustrating fibre ribbon geometry
(4-fibre ribbon) . 9
Figure 5 – Example of identification by means of colour coding and positioning . 11
Table 1 – Maximum dimensions of optical fibre ribbons for a typical 250 µm coating fibre . 8
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 1-31: Generic specification –
Optical cable elements – Optical fibre ribbon
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.
International Standard IEC 60794-1-31 has been prepared by subcommittee SC86A: Fibres
and cables, of IEC technical committee 86: Fibre optics.
This bilingual version (2019-02) corresponds to the monolingual English version, published in
2018-05.
The text of this International Standard is based on the following documents:
CDV Report on voting
86A/1806/CDV 86A/1840/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
– 4 – IEC 60794-1-31:2018 © IEC 2018
The French version of this standard has not been voted upon.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
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 "http://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 1-31: Generic specification –
Optical cable elements – Optical fibre ribbon
1 Scope
This part of IEC 60794, which is a generic specification, covers optical fibre ribbons.
Requirements which are described in this part apply to optical fibre ribbon cables for use with
telecommunication equipment and devices employing similar techniques, in particular optical
fibre cables in IEC 60794-2 for indoor use and in IEC 60794-3 for outdoor use. D
...
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