SIST EN IEC 60794-2-50:2023
(Main)Optical fibre cables - Part 2-50: Indoor cables - Family specification for simplex and duplex cables for use in terminated cable assemblies (IEC 60794-2-50:2023)
Optical fibre cables - Part 2-50: Indoor cables - Family specification for simplex and duplex cables for use in terminated cable assemblies (IEC 60794-2-50:2023)
This part of IEC 60794 is a family specification that specifies requirements for simplex and
duplex optical fibre cables for use in terminated cable assemblies or as used for termination of
passive components.
Lichtwellenleiterkabel - Teil 2-50: LWL-Innenkabel - Familienspezifikation für Simplex- und Duplexkabel für den Einsatz in konfektionierten Kabeln (IEC 60794-2-50:2023)
Câbles à fibres optiques - Partie 2-50: Câbles intérieurs - Spécification de famille pour les câbles simplex et duplex utilisés dans les câbles assemblés équipés (IEC 60794-2-50:2023)
IEC 60794-2-50:2023 est disponible sous forme de IEC 60794-2-50:2023 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 60794-2-50:2023 spécifie les exigences pour les câbles simplex et duplex à fibres optiques utilisés dans des câbles assemblés équipés ou comme terminaison pour des composants passifs.Cette troisième édition annule et remplace la deuxième édition parue en 2020. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) ajout de l’IEC 60793-1-46 et de l’IEC 60794-1-211 dans les références normatives;
b) modification de la durée d’application des charges pour l’essai de traction qui est portée de 5 min à 10 min;
c) clarification de la distance entre les pinces pour l’essai de torsion de 125 fois le diamètre du câble, mais pas moins de 0,3 m;
d) recommandation des températures –10 °C et +60 °C pour les câbles intérieurs simplex et duplex et inclusion des températures hautes et basses pour les catégories C, CHD, OP et OPHD conformément aux environnements de service ou de fonctionnement de l’IEC 617531 pour les essais de cycles de température et de rétraction;
e) mise à jour de la norme d’essai de rétraction conformément à l’IEC 60794-1-211, F11A, et modification de l’exigence à 20 mm au maximum;
f) remplacement du texte du comportement au feu par une description améliorée.
Optični kabli - 2-50. del: Notranji kabli - Skupinska specifikacija za simpleksne in dupleksne kable za zaključene kabelske sestave (IEC 60794-2-50:2023)
Ta del standarda IEC 60794 je sklop specifikacij, ki določa zahteve za simpleksne in dupleksne optične kable za zaključene kabelske sestave ali za zaključevanje pasivnih komponent.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 60794-2-50:2023
01-julij-2023
Optični kabli - 2-50. del: Notranji kabli - Skupinska specifikacija za simpleksne in
dupleksne kable za zaključene kabelske sestave (IEC 60794-2-50:2023)
Optical fibre cables - Part 2-50: Indoor cables - Family specification for simplex and
duplex cables for use in terminated cable assemblies (IEC 60794-2-50:2023)
Lichtwellenleiterkabel - Teil 2-50: LWL-Innenkabel - Familienspezifikation für Simplex-
und Duplexkabel für den Einsatz in konfektionierten Kabeln (IEC 60794-2-50:2023)
Câbles à fibres optiques - Partie 2-50: Câbles intérieurs - Spécification de famille pour
les câbles simplex et duplex utilisés dans les câbles assemblés équipés (IEC 60794-2-
50:2023)
Ta slovenski standard je istoveten z: EN IEC 60794-2-50:2023
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
SIST EN IEC 60794-2-50:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 60794-2-50:2023
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SIST EN IEC 60794-2-50:2023
EUROPEAN STANDARD EN IEC 60794-2-50
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2023
ICS 33.180.10 Supersedes EN IEC 60794-2-50:2020
English Version
Optical fibre cables - Part 2-50: Indoor cables - Family
specification for simplex and duplex cables for use in terminated
cable assemblies
(IEC 60794-2-50:2023)
Câbles à fibres optiques - Partie 2-50: Câbles intérieurs - Lichtwellenleiterkabel - Teil 2-50: LWL-Innenkabel -
Spécification de famille pour les câbles simplex et duplex Familienspezifikation für Simplex- und Duplexkabel für den
utilisés dans les câbles assemblés équipés Einsatz in konfektionierten Kabeln
(IEC 60794-2-50:2023) (IEC 60794-2-50:2023)
This European Standard was approved by CENELEC on 2023-05-05. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60794-2-50:2023 E
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SIST EN IEC 60794-2-50:2023
EN IEC 60794-2-50:2023 (E)
European foreword
The text of document 86A/2284/FDIS, future edition 3 of IEC 60794-2-50, prepared by SC 86A "Fibres
and cables" of IEC/TC 86 "Fibre optics" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 60794-2-50:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-02-05
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-05-05
document have to be withdrawn
This document supersedes EN IEC 60794-2-50:2020 and all of its amendments and corrigenda (if
any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60794-2-50:2023 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60793-1-1 NOTE Approved as EN IEC 60793-1-1
IEC 61753-1 NOTE Approved as EN IEC 61753-1
2
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SIST EN IEC 60794-2-50:2023
EN IEC 60794-2-50:2023 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60793-1-20 - Optical fibres - Part 1-20: Measurement EN 60793-1-20 -
methods and test procedures - Fibre
geometry
IEC 60793-1-21 - Optical fibres - Part 1-21: Measurement EN 60793-1-21 -
methods and test procedures - Coating
geometry
IEC 60793-1-32 - Optical fibres - Part 1-32: Measurement EN IEC 60793-1-32 -
methods and test procedures - Coating
strippability
IEC 60793-1-40 - Optical fibres - Part 1-40: Attenuation EN IEC 60793-1-40 -
measurement methods
IEC 60793-1-46 - Optical fibres - Part 1-46: Measurement EN 60793-1-46 -
methods and test procedures - Monitoring
of changes in optical transmittance
IEC 60793-2-10 - Optical fibres - Part 2-10: Product EN IEC 60793-2-10 -
specifications - Sectional specification for
category A1 multimode fibres
IEC 60793-2-50 - Optical fibres - Part 2-50: Product EN IEC 60793-2-50 -
specifications - Sectional specification for
class B single-mode fibres
IEC 60794-1-1 - Optical fibre cables - Part 1-1: Generic EN 60794-1-1 -
specification - General
IEC 60794-1-2 - Optical fibre cables - Part 1-2: Generic EN IEC 60794-1-2 -
specification - Basic optical cable test
procedures - General guidance
IEC 60794-1-21 - Optical fibre cables - Part 1-21: Generic EN 60794-1-21 -
specification - Basic optical cable test
procedures - Mechanical tests methods
IEC 60794-1-22 - Optical fibre cables - Part 1-22: Generic EN IEC 60794-1-22 -
specification - Basic optical cable test
procedures - Environmental test methods
3
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SIST EN IEC 60794-2-50:2023
EN IEC 60794-2-50:2023 (E)
IEC 60794-1-23 - Optical fibre cables - Part 1-23: Generic EN IEC 60794-1-23 -
specification - Basic optical cable test
procedures - Cable element test methods
IEC 60794-1-211 - Optical fibre cables - Part 1-211: Generic EN IEC 60794-1-211 -
specification - Basic optical cable test
procedures - Environmental test methods -
Sheath shrinkage, method F11
IEC 60794-2 - Optical fibre cables - Part 2: Indoor cables EN 60794-2 -
- Sectional specification
IEC 60811-202 - Electric and optical fibre cables - Test EN 60811-202 -
methods for non-metallic materials - Part
202: General tests - Measurement of
thickness of non-metallic sheath
IEC 60811-203 - Electric and optical fibre cables - Test EN 60811-203 -
methods for non-metallic materials - Part
203: General tests - Measurement of
overall dimensions
4
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SIST EN IEC 60794-2-50:2023
IEC 60794-2-50
®
Edition 3.0 2023-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 2-50: Indoor cables – Family specification for simplex and duplex cables for
use in terminated cable assemblies
Câbles à fibres optiques –
Partie 2-50: Câbles intérieurs – Spécification de famille pour les câbles simplex
et duplex utilisés dans les câbles assemblés équipés
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-6711-0
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
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SIST EN IEC 60794-2-50:2023
– 2 – IEC 60794-2-50:2023 © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Construction . 8
4.1 General . 8
4.2 Optical fibres and primary coating . 8
4.3 Buffer . 8
4.4 Tube . 9
4.5 Strength and anti-buckling members . 9
4.6 Sheath . 9
4.7 Sheath marking . 9
4.8 Examples of cable constructions . 9
5 Tests . 10
5.1 General . 10
5.2 Dimensions . 10
5.3 Mechanical requirements . 11
5.3.1 Tensile performance . 11
5.3.2 Crush . 11
5.3.3 Impact . 12
5.3.4 Repeated bending . 12
5.3.5 Bend . 12
5.3.6 Torsion . 13
5.3.7 Bend at low temperature . 13
5.3.8 Kink . 14
5.3.9 Sheath pull-off force . 14
5.3.10 Abrasion resistance of cable marking . 14
5.3.11 Buffered fibre movement under compression . 14
5.4 Environmental requirements . 15
5.4.1 Temperature cycling . 15
5.4.2 Sheath shrinkage . 15
6 Transmission requirements . 16
7 Fire performance . 16
Annex A (informative) Examples of cable constructions . 17
Annex B (informative) Guidance on the selection of tests applicable to optical fibre
cables for use in terminated cable assemblies . 20
Bibliography . 23
Figure A.1 – Simplex non-buffered cable . 17
Figure A.2 – Simplex cable . 17
Figure A.3 – Duplex non-buffered cable . 18
Figure A.4 – Duplex cable . 18
Figure A.5 – Duplex zip cord cable . 18
Figure A.6 – Duplex flat cable . 19
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SIST EN IEC 60794-2-50:2023
IEC 60794-2-50:2023 © IEC 2023 – 3 –
Figure A.7 – Duplex round cable (breakout cable) . 19
Table 1 – Outer dimensions of buffered fibres . 9
Table 2 – Preferred low and high temperatures . 15
Table B.1 – Cable test method summary . 20
Table B.2 – Blank detail specification for cable testing agreement . 22
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SIST EN IEC 60794-2-50:2023
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 2-50: Indoor cables – Family specification for simplex
and duplex cables for use in terminated cable assemblies
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
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 60794-2-50 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical
committee 86: Fibre optics. It is an International Standard.
This third edition cancels and replaces the second edition published in 2020. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) added IEC 60793-1-46 and IEC 60794-1-211 to the normative references;
b) changed the load duration for the tensile test from 5 min to 10 min;
c) clarified the distance between the clamps for torsion test to 125 times cable diameter, but
not less than 0,3 m;
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SIST EN IEC 60794-2-50:2023
IEC 60794-2-50:2023 © IEC 2023 – 5 –
d) recommended the temperatures –10 °C and +60 °C for indoor simplex and duplex cables
HD HD
and included the low and high temperatures for category C, C , OP and OP according
to the operating service environments in IEC 61753-1 for temperature cycling and shrinkage
testing;
e) updated the shrinkage test standard to IEC 60794-1-211, F11A, and changed the
requirement to maximum 20 mm;
f) replaced the text for the fire performance with an improved description.
The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2284/FDIS 86A/2316/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/publications.
A list of all the 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.
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INTRODUCTION
This document includes test methods according to IEC 60794-1-21, IEC 60794-1-22 and
IEC 60794-1-23 that will be split into single documents and individually renumbered in the
IEC 60794-1-1xx series, IEC 60794-1-2xx series and IEC 60794-1-3xx series. Full cross-
reference details are given in IEC 60794-1-2.
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SIST EN IEC 60794-2-50:2023
IEC 60794-2-50:2023 © IEC 2023 – 7 –
OPTICAL FIBRE CABLES –
Part 2-50: Indoor cables – Family specification for simplex
and duplex cables for use in terminated cable assemblies
1 Scope
This part of IEC 60794 is a family specification that specifies requirements for simplex and
duplex optical fibre cables for use in terminated cable assemblies or as used for termination of
passive components.
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 60793-1-20, Optical fibres – Part 1-20: Measurement methods and test procedures – Fibre
geometry
IEC 60793-1-21, Optical fibres – Part 1-21: Measurement methods and test procedures –
Coating geometry
IEC 60793-1-32, Optical fibres – Part 1-32: Measurement methods and test procedures –
Coating strippability
IEC 60793-1-40, Optical fibres – Part 1-40: Attenuation measurement methods
IEC 60793-1-46, Optical fibres – Part 1-46: Measurement methods and test procedures –
Monitoring of changes in optical transmittance
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 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test
procedures – General guidance
IEC 60794-1-211, Optical fibre cables – Part 1-211: Generic specification – Basic optical cable
test procedures – Environmental test methods – Sheath shrinkage, method F11
IEC 60794-1-21, Optical fibre cables – Part 1-21: Generic specification – Basic optical cable
test procedures – Mechanical tests methods
IEC 60794-1-22, Optical fibre cables – Part 1-22: Generic specification – Basic optical cable
test procedures – Environmental tests methods
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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 60811-202, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 202: General tests – Measurement of thickness of non-metallic sheath
IEC 60811-203, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 203: General tests – Measurement of overall dimensions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60794-1-1 and the
following 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
3.1
terminated cable assembly
cable terminated with connectors
Note 1 to entry: Examples from the ISO/IEC 11801 series are optical fibre cords used to establish connections on
patch panels, equipment and at work areas or to connect outlets to the terminal equipment.
Note 2 to entry: A so called patch cord or jumper is one type of a terminated cable assembly.
4 Construction
4.1 General
In addition to the constructional requirements in IEC 60794-2, the following considerations
apply to simplex and duplex indoor cables for use in terminated cable assemblies.
It is not the intention of this document to specify the finished terminated cable assembly
complete with terminations.
There shall be no fibre splice in a delivery length. It shall be possible to identify each individual
fibre throughout the length of the cable.
4.2 Optical fibres and primary coating
Multimode or single-mode optical fibres meeting the requirements of IEC 60793-2-10
sub-categories A1-OM1 or A1-OM2 to A1-OM5 or IEC 60793-2-50 class B shall be used.
4.3 Buffer
If a tight or semi-tight (loosely applied) buffer is required, it shall consist of one or more layers
of inert material. Unless otherwise specified, the tight buffer shall be removed in one operation
together with fibre coating over the specified length. Semi-tight tubes may be filled. For
semi-tight and loose buffer, the buffer material is removed for a specified length leaving the
primary coating of the fibre intact.
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IEC 60794-2-50:2023 © IEC 2023 – 9 –
Specified buffer strippability minimum lengths:
– tight: 15 mm;
– semi tight: 300 mm;
– loose: 1,0 m.
Strip force shall comply to the values stated in the relevant specification and the evaluation
shall be carried out according to IEC 60793-1-32.
Buffer dimensions are shown in Table 1.
Table 1 – Outer dimensions of buffered fibres
Nominal outer diameter Tolerance
mm mm
0,3 to 0,9 ±0,05
Lower tolerance levels can be a requirement for buffered fibres having a low nominal diameter
within the specified range. In such cases, tolerance values shall be agreed between supplier
and customer.
4.4 Tube
One or two primary coated or buffered fibres are packaged in a tube construction which may be
filled. A tube is a cable element that is not covered in 4.3 and typically has a larger outer
diameter than what is specified in 4.3. The tube may be reinforced with a composite wall.
If required, the suitability of the tube shall be determined by an evaluation of its kink resistance
in accordance with IEC 60794-1-23, method G7.
4.5 Strength and anti-buckling members
The cable shall be designed with sufficient strength members to meet the requirements of this
document.
The strength and/or anti-buckling member may be either metallic or non-metallic and may be
located in the cable core and/or under the sheath and/or in the sheath.
4.6 Sheath
The cable shall have a uniform overall protective sheath. The cable diameter shall be specified
in the relevant specification. Sheath removal is an important feature of these cables. Sheath
pull-off force shall be determined in accordance with IEC 60794-1-21, method E21.
4.7 Sheath marking
If required, the cable shall be marked as agreed between the customer and supplier.
4.8 Examples of cable constructions
Examples of cable constructions are shown in Annex A.
Other configurations are not excluded if they meet the mechanical, environmental, transmission
and termination requirements given in this document.
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5 Tests
5.1 General
Compliance with the specification requirements shall be verified by carrying out tests selected
from Clause 5. It is not intended that all tests be carried out in all cases, and Annex B provides
guidance on the selection of applicable tests. The tests to be applied and the frequency of
testing need to be agreed between the customer and supplier.
Some of the following tests can be performed on a short sample length of cable which is still an
integral part of a longer length, thus making it possible to detect permanent changes in
attenuation. As a general requirement for the tests specified in this document, the goal is to
keep "no change in attenuation" criteria at the end of each evaluation, although the parameters
specified in this document may be affected by measurement un
...
SLOVENSKI STANDARD
oSIST prEN IEC 60794-2-50:2022
01-september-2022
Optični kabli - 2-50. del: Notranji optični kabli - Skupinska specifikacija za
simpleksne in dupleksne kable za zaključene kabelske sestave
Optical fibre cables - Part 2-50: Indoor cables - Family specification for simplex and
duplex cables for use in terminated cable assemblies
Lichtwellenleiterkabel - Teil 2-50: LWL-Innenkabel - Familienspezifikation für Simplex-
und Duplexkabel für den Einsatz in konfektionierten Kabeln
Câbles à fibres optiques - Partie 2-50: Câbles intérieurs - Spécification de famille pour
les câbles simplex et duplex utilisés dans les câbles assemblés équipés
Ta slovenski standard je istoveten z: prEN IEC 60794-2-50:2022
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
oSIST prEN IEC 60794-2-50:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 60794-2-50:2022
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oSIST prEN IEC 60794-2-50:2022
86A/2202/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60794-2-50 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-06-10 2022-09-02
SUPERSEDES DOCUMENTS:
86A/2165/CD, 86A/2196/CC
IEC SC 86A : FIBRES AND CABLES
SECRETARIAT: SECRETARY:
France Mr Laurent Gasca
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
SC 86B
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
TITLE:
Optical fibre cables - Part 2-50: Indoor cables - Family specification for simplex and duplex
cables for use in terminated cable assemblies
PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
Copyright © 2022 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
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oSIST prEN IEC 60794-2-50:2022
IEC CDV 60794-2-50/Ed3 © IEC 2022 – 2 – 86A/2202/CDV
1 CONTENTS
2 CONTENTS . 2
3 FOREWORD . 4
4 1 Scope . 6
5 2 Normative references . 6
6 3 Terms and definitions . 7
7 4 Construction . 7
8 4.1 General . 7
9 4.2 Optical fibres and primary coating . 7
10 4.3 Buffer . 8
11 4.4 Tube . 8
12 4.5 Strength and anti-buckling members . 8
13 4.6 Sheath . 8
14 4.7 Sheath marking . 8
15 4.8 Examples of cable constructions . 9
16 5 Tests . 9
17 5.1 General . 9
18 5.2 Dimensions . 9
19 5.3 Mechanical requirements . 10
20 5.3.1 Tensile performance . 10
21 5.3.2 Crush . 10
22 5.3.3 Impact . 11
23 5.3.4 Repeated bending . 11
24 5.3.5 Bend . 12
25 5.3.6 Torsion . 12
26 5.3.7 Bend at low temperature . 13
27 5.3.8 Kink . 13
28 5.3.9 Sheath pull-off force . 13
29 5.3.10 Abrasion resistance of cable marking . 13
30 5.3.11 Buffered fibre movement under compression . 14
31 5.4 Environmental requirements . 14
32 5.4.1 Temperature cycling . 14
33 5.4.2 Sheath shrinkage . 15
34 6 Transmission requirements . 15
35 7 Fire performance . 15
36 Annex A (informative) Examples of cable constructions . 16
37 Annex B (informative) Guidance on the selection of tests applicable to optical fibre
38 cables for use in terminated cable assemblies . 19
39 Bibliography . 22
40
41 Figure A.1 – Simplex non-buffered cable . 16
42 Figure A.2 – Simplex cable . 16
43 Figure A.3 – Duplex non-buffered cable . 16
44 Figure A.4 – Duplex cable . 17
45 Figure A.5 – Duplex zip cord cable . 17
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46 Figure A.6 – Duplex flat cable . 17
47 Figure A.7 – Duplex round cable (breakout cable) . 18
48
49 Table 1 – Outer dimensions of buffered fibres . 8
50 Table 2 – Preferred low and high temperatures . 14
51 Table B.1 – Cable test method summary . 19
52 Table B.2 – Blank detail specification for cable testing agreement . 21
53
54
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55 INTERNATIONAL ELECTROTECHNICAL COMMISSION
56 ____________
57
58 OPTICAL FIBRE CABLES –
59
60 Part 2-50: Indoor cables – Family specification for simplex
61 and duplex cables for use in terminated cable assemblies
62
63 FOREWORD
64 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
65 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
66 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
67 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
68 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
69 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
70 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
71 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
72 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
73 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
74 consensus of opinion on the relevant subjects since each technical committee has representation from all
75 interested IEC National Committees.
76 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
77 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
78 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
79 misinterpretation by any end user.
80 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
81 transparently to the maximum extent possible in their national and regional publications. Any divergence between
82 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
83 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
84 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
85 services carried out by independent certification bodies.
86 6) All users should ensure that they have the latest edition of this publication.
87 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
88 members of its technical committees and IEC National Committees for any personal injury, property damage or
89 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
90 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
91 Publications.
92 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
93 indispensable for the correct application of this publication.
94 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
95 rights. IEC shall not be held responsible for identifying any or all such patent rights.
96 International Standard IEC 60794-2-50 has been prepared by subcommittee 86A: Fibres and
97 cables, of IEC technical committee 86: Fibre optics.
98 This document includes test methods according to IEC 60794-1-21, IEC 60794-1-22 and
99 IEC 60794-1-23 that will be split into single documents and individually renumbered in the
100 IEC 60794-1-1xx series, IEC 60794-1-2xx series and IEC 60794-1-3xx series. Full cross-
101 reference details are given in IEC 60794-1-2.
102 This third edition cancels and replaces the second edition published in 2020. This edition
103 constitutes a technical revision.
104 This edition includes the following significant technical changes with respect to the previous
105 edition:
106 a) added IEC 60793-1-46 and IEC 60794-1-211 to the normative references;
107 b) changed the load duration for the tensile test from 5 to 10 min;
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108 c) clarified the distance between the clamps for torsion test to 125 times cable diameter, but
109 not less than 0,3 m;
110 d) recommended the temperatures -10 °C and +60 °C for indoor simplex and duplex cables and
HD HD
111 included the low and high temperatures for category C, C , OP and OP according to the
112 operating service environments in IEC 61753-1 for temperature cycling and shrinkage
113 testing;
114 e) updated the shrinkage test standard to IEC 60794-1-211, F11A, and changed the
115 requirement to maximum 20 mm;
116 f) replaced the text for the fire performance with an improved description.
117 The text of this International Standard is based on the following documents:
FDIS Report on voting
86A/1972/FDIS 86A/1978/RVD
118
119 Full information on the voting for the approval of this International Standard can be found in the
120 report on voting indicated in the above table.
121 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
122 A list of all the parts in the IEC 61340 series, published under the general title Optical fibre
123 cables, can be found on the IEC website.
124 The committee has decided that the contents of this document will remain unchanged until the
125 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
126 the specific document. At this date, the document will be
127 • reconfirmed,
128 • withdrawn,
129 • replaced by a revised edition, or
130 • amended.
131
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.
132
133
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134
135 OPTICAL FIBRE CABLES –
136
137 Part 2-50: Indoor cables – Family specification for simplex
138 and duplex cables for use in terminated cable assemblies
139
140
141
142 1 Scope
143 This part of IEC 60794 is a family specification that specifies requirements for simplex and
144 duplex optical fibre cables for use in terminated cable assemblies or as used for termination of
145 passive components.
146 2 Normative references
147 The following documents are referred to in the text in such a way that some or all of their content
148 constitutes requirements of this document. For dated references, only the edition cited applies.
149 For undated references, the latest edition of the referenced document (including any
150 amendments) applies.
151 IEC 60793-1-20, Optical fibres – Part 1-20: Measurement methods and test procedures – Fibre
152 geometry
153 IEC 60793-1-21, Optical fibres – Part 1-21: Measurement methods and test procedures –
154 Coating geometry
155 IEC 60793-1-32, Optical fibres – Part 1-32: Measurement methods and test procedures –
156 Coating strippability
157 IEC 60793-1-40, Optical fibres – Part 1-40: Attenuation measurement methods
158 IEC 60793-1-46, Optical fibres – Part 1-46: Monitoring of changes in optical transmittance
159 IEC 60793-2-10, Optical fibres – Part 2-10: Product specifications – Sectional specification for
160 category A1 multimode fibres
161 IEC 60793-2-50, Optical fibres – Part 2-50: Product specifications – Sectional specification for
162 class B single-mode fibres
163 IEC 60794-1-1, Optical fibre cables – Part 1-1: Generic specification – General
164 IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test
165 procedures – General guidance
166 IEC 60794-1-211, Optical fibre cables - Part 1-211: Generic specification - Basic optical cable
167 test procedures - Environmental test methods - Sheath shrinkage, Method F11
168 IEC 60794-1-21, Optical fibre cables – Part 1-21: Generic specification – Basic optical cable
169 test procedures – Mechanical tests methods
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170 IEC 60794-1-22, Optical fibre cables – Part 1-22: Generic specification – Basic optical cable
171 test procedures – Environmental tests methods
172 IEC 60794-1-23, Optical fibre cables – Part 1-23: Generic specification – Basic optical cable
173 test procedures – Cable element test methods
174 IEC 60794-2, Optical fibre cables – Part 2: Indoor cables – Sectional specification
175 IEC 60811-202, Electric and optical fibre cables – Test methods for non-metallic materials –
176 Part 202: General tests – Measurement of thickness of non-metallic sheath
177 IEC 60811-203, Electric and optical fibre cables – Test methods for non-metallic materials –
178 Part 203: General tests – Measurement of overall dimensions
179 3 Terms and definitions
180 For the purposes of this document, the terms and definitions given in IEC 60794-1-1 and the
181 following apply.
182 ISO and IEC maintain terminological databases for use in standardization at the following
183 addresses:
184 • IEC Electropedia: available at http://www.electropedia.org/
185 • ISO Online browsing platform: available at http://www.iso.org/obp
186 3.1
187 terminated cable assembly
188 a cable terminated with connectors
189 Note 1 to entry: Examples from ISO/IEC 11801 (all parts) are optical fibre cords used to establish connections on
190 patch panels, equipment and at work areas or to connect outlets to the terminal equipment.
191 Note 2 to entry: A so called patch cord or jumper is one type of a terminated cable assembly.
192 4 Construction
193 4.1 General
194 In addition to the constructional requirements in IEC 60794-2, the following considerations
195 apply to simplex and duplex indoor cables for use in terminated cable assemblies.
196 It is not the intention of this document to specify the finished terminated cable assembly
197 complete with terminations.
198 There shall be no fibre splice in a delivery length. It shall be possible to identify each individual
199 fibre throughout the length of the cable.
200 4.2 Optical fibres and primary coating
201 Multimode or single-mode optical fibres meeting the requirements of IEC 60793-2-10
202 sub-categories A1-OM1 or A1-OM2 to A1-OM5 or IEC 60793-2-50 class B shall be used.
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203 4.3 Buffer
204 If a tight or semi-tight (loosely applied) buffer is required, it shall consist of one or more layers
205 of inert material. Unless otherwise specified, the tight buffer shall be removed in one operation
206 together with fibre coating over the specified length. Semi-tight tubes may be filled. For semi-
207 tight and loose buffer, the buffer material is removed for a specified length leaving the primary
208 coating of the fibre intact.
209 Specified buffer strippability minimum lengths:
210 – tight: 15 mm;
211 – semi tight: 300 mm;
212 – loose: 1,0 m.
213 Strip force shall comply to the values stated in the relevant specification and the evaluation
214 shall be carried out according to IEC 60793-1-32.
215 Buffer dimensions are shown in Table 1.
216 Table 1 – Outer dimensions of buffered fibres
Nominal outer diameter Tolerance
mm mm
0,3 to 0,9 ± 0,05
217
218 Lower tolerance levels can be a requirement for buffered fibres having a low nominal diameter
219 within the specified range. In such cases, tolerance values shall be agreed between supplier
220 and customer.
221 4.4 Tube
222 One or two primary coated or buffered fibres are packaged in a tube construction which may be
223 filled. A tube is a cable element that is not covered in 4.3 and typically has a larger outer
224 diameter than what is specified in 4.3. The tube may be reinforced with a composite wall.
225 If required, the suitability of the tube shall be determined by an evaluation of its kink resistance
226 in accordance with IEC 60794-1-23, method G7.
227 4.5 Strength and anti-buckling members
228 The cable shall be designed with sufficient strength members to meet the requirements of this
229 document.
230 The strength and/or anti-buckling member may be either metallic or non-metallic and may be
231 located in the cable core and/or under the sheath and/or in the sheath.
232 4.6 Sheath
233 The cable shall have a uniform overall protective sheath. The cable diameter shall be specified
234 in the relevant specification. Sheath removal is an important feature of these cables. Sheath
235 pull-off force shall be determined in accordance with IEC 60794-1-21, method E21.
236 4.7 Sheath marking
237 If required, the cable shall be marked as agreed between the customer and supplier.
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238 4.8 Examples of cable constructions
239 Examples of cable constructions are shown in Annex A.
240 Other configurations are not excluded if they meet the mechanical, environmental, transmission
241 and termination requirements given in this document.
242 5 Tests
243 5.1 General
244 Compliance with the specification requirements shall be verified by carrying out tests selected
245 from Clause 5. It is not intended that all tests be carried out in all cases, and Annex B provides
246 guidance on the selection of applicable tests. The tests to be applied and the frequency of
247 testing need to be agreed between the customer and supplier.
248 Some of the following tests can be performed on a short sample length of cable which is still an
249 integral part of a longer length, thus making it possible to detect permanent changes in
250 attenuation. As a general requirement for the tests specified in this document, the spirit is to
251 keep "no change in attenuation" criteria at the end of each evaluation, although the parameters
252 specified in this document may be affected by measurement uncertainty arising either from
253 measurement errors or calibration errors. The optical total uncertainty of measurement for this
254 document shall be ± 0,05 dB for single-mode fibres and ± 0,2 dB for multimode fibres. Any
255 measured value within this range shall be considered as "no change in attenuation".
256 Single-mode fibre cables are measured at 1 550 nm or 1 625 nm and the measuring wavelength
257 shall be agreed between the customer and supplier. Multimode fibre cables are measured at
258 850 nm or 1 300 nm and the measuring wavelength shall be agreed between the customer and
259 supplier. Measurements of attenuation shall be carried out according to IEC 60793-1-40.
260 Change in attenuation measurements shall be carried out according to IEC 60793-1-46.
261 NOTE The optimized wavelength for multimode fibres A1-OM3 and A1-OM4 is 850 nm and for A1-OM5 fibre, the
262 targeted operational wavelength range is in the vicinity of 850 nm to 950 nm.
263 If loops are used within a test to fix the ends of a cable, the loop diameter shall be equal or
264 greater than the specified minimum cable bend diameter to avoid cable damage and excessive
265 mode filtering in multimode fibre.
266 Unless otherwise specified, all tests shall be carried out at expanded test conditions as
267 specified in IEC 60794-1-2.
268 5.2 Dimensions
269 The fibre dimensions and tolerances shall be checked in accordance with test method
270 IEC 60793‑1‑20 or IEC 60793‑1‑21. The diameter of the buffer and of the cable, as well as the
271 thickness of the sheath, shall be measured in accordance with the methods of IEC 60811-202
272 and IEC 60811-203.
273 The nominal outer cable diameter is abbreviated as “d” in this document. “d” for the different
274 cable constructions is defined as follows:
275 – For simplex cable, “d” is the outer diameter;
276 – For zip cord cable, “d” is the outer diameter of the simplex cable which is used to be
277 combined with another simplex cable to form a zip cord;
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278 – For duplex flat cable, “d” is the outer diameter of the inner cables which include the optical
279 fibre, the buffer, the strength members and the sheath;
280 – For duplex round cable, “d” is the outer diameter of the inner cables which include the optical
281 fibre, the buffer, the strength members and the sheath.
282 The cable diameter tolerance shall be ± 0,2 mm.
283 The deviation of the average sheath thickness shall be within the tolerance of ± 0,1 mm for
284 100 % of the cable length.
285 5.3 Mechanical requirements
286 5.3.1 Tensile performance
287 Method: IEC 60794-1-21, E1
288 Diameter of chuck drums and transfer devices: not less than the minimum loaded bending
289 diameter specified for the cable, at least 250 mm diameter.
290 Load for 10 min:
291 – simplex cables d < 1,2 mm at 50 N; simplex cables 1,2 mm ≤ d ≤ 2,0 mm at 70 N; simplex
292 cables d > 2,0 mm at 100 N;
293 – duplex round cables at 100 N;
294 – zipcord and duplex flat cables d ≤ 2,0 mm at 140 N; zipcord and duplex flat cables d
295 > 2,0 mm at 200 N.
296 Length of sample: sufficient to achieve the desired accuracy of measurement of attenuation
297 change shall be agreed between the customer and supplier.
298 Requirements:
299 – in all cases, fibre strain shall not exceed 60 % of the proof strain (equals to absolute 0,6 %
300 strain for 1 % proof-tested fibres);
301 – the maximum allowable increase in attenuation during the test shall be specified in the
302 relevant specification;
303 – there shall be no change in attenuation after the test.
304 5.3.2 Crush
305 Method: IEC 60794-1-21, E3A
306 Force short-term:
307 – 300 N for simplex/duplex cables with d ≤ 2,0 mm;
308 – 500 N for simplex/duplex cables with d > 2,0 mm.
309 Duration short-term: 1 min
310 Number of crushes short-term: 1
311 Force long-term:
312 – 100 N for simplex/duplex cables with d ≤ 2,0 mm;
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313 – 200 N for simplex/duplex cables with d > 2,0 mm.
314 Duration long-term: 10 min
315 Number of crushes long-term: 1, separated at least 500 mm to any other loaded position.
316 Requirements:
317 – the maximum increase in attenuation during the test with a long-term force shall be specified
318 in the relevant specification;
319 – there shall be no change in attenuation after the test with short-term and long-term force;
320 – there shall be no damage to the cable elements; any flattening of cable elements is not
321 considered as damage.
322 For cables having a non-circular cross section, the force shall be applied in the direction of the
323 minor axis (perpendicular to the major axis), as shown in Figure A.6 as an example.
324 5.3.3 Impact
325 Method: IEC 60794-1-21, E4
326 – impact energy: 0,5 J for simplex/duplex cables with d ≤ 2,0 mm; 1,0 J for simplex/duplex
327 cables with d > 2,0 mm;
328 – number of impacts: 3, each separated at least 500 mm.
329 Requirements:
330 – there shall be no change in attenuation after the test;
331 – there shall be no damage to the cable elements; any flattening of cable elements is not
332 considered as damage.
333 For cables having a non-circular cross section, the force shall be applied in the direction of the
334 minor axis (perpendicular to the major axis), as shown in Figure A.5 and Figure A.6.
335 5.3.4 Repeated bending
336 Method: IEC 60794-1-21, E6
337 Bending diameter
...
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