EN IEC 60794-2-21:2019

SLOVENSKI STANDARD
01-september-2019
Nadomešča:
SIST EN 60794-2-21:2012
Optični kabli - 2-21. del: Notranji optični kabli - Podrobna specifikacija za
razdelilne večvlakenske optične kable za okablenje prostorov (IEC 60794-2-
21:2019)
Optical fibre cables - Part 2-21: Indoor cables - Detailed specification for multi-fibre
optical distribution cables for use in premises cabling (IEC 60794-2-21:2019)
Lichtwellenleiterkabel - Teil 2-21: LWL-Innenkabel - Bauartspezifikation für
Mehrfaserverteilerkabel für anwendungsneutrale Standortverkabelung (IEC 60794-2-
21:2019)
Câbles à fibres optiques - Partie 2-21: Câbles à fibres optiques intérieurs - Spécification
particulière pour les câbles optiques multi-fibres de distribution utilisés dans le câblage
de locaux (IEC 60794-2-21:2019)
Ta slovenski standard je istoveten z: EN IEC 60794-2-21:2019
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60794-2-21

NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2019
ICS 33.180.10 Supersedes EN 60794-2-21:2012
English Version
Optical fibre cables - Part 2-21: Indoor cables - Detailed
specification for multi-fibre optical distribution cables for use in
premises cabling
(IEC 60794-2-21:2019)
Câbles à fibres optiques - Partie 2-21: Câbles intérieurs - Lichtwellenleiterkabel - Teil 2-21: LWL-Innenkabel -
Spécification particulière pour les câbles optiques Bauartspezifikation für Mehrfaserverteilerkabel für
multifibres de distribution utilisés dans le câblage de locaux anwendungsneutrale Standortverkabelung
(IEC 60794-2-21:2019) (IEC 60794-2-21:2019)
This European Standard was approved by CENELEC on 2019-05-17. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60794-2-21:2019 E

European foreword
The text of document 86A/1925/FDIS, future edition 3 of IEC 60794-2-21, 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 60794-2-21:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-02-17
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-05-17
document have to be withdrawn
This document supersedes EN 60794-2-21:2012.
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.
Endorsement notice
The text of the International Standard IEC 60794-2-21:2019 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 standards
indicated:
IEC 60794-1-21 NOTE Harmonized as EN 60794-1-21
IEC 60794-1-22 NOTE Harmonized as EN IEC 60794-1-22
IEC 60794-1-23 NOTE Harmonized as EN 60794-1-23
IEC 60794-2 NOTE Harmonized as EN 60794-2
IEC 60794-2-10:2011 NOTE Harmonized as EN 60794-2-10:2011 (not modified)

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.cenelec.eu.
Publication Year Title EN/HD Year
1 2
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 2018 Optical fibres - Part 2-50: Product EN IEC 60793-2-50 2019
specifications - Sectional specification for
class B single-mode fibres
IEC 60794-1-1 2015 Optical fibre cables - Part 1-1: Generic EN 60794-1-1 2016
specification - General
IEC 60794-2-20 2013 Optical fibre cables - Part 2-20: Indoor EN 60794-2-20 2014
cables - Family specification for multi-fibre
optical cables
Under preparation. Stage at the time of publication: IEC DECFDIS 60793-2-10:2019.
Under preparation. Stage at the time of publication: FprEN IEC 60793-2-10:2019.
IEC 60794-2-21 ®
Edition 3.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 2-21: Indoor cables – Detailed specification for multi-fibre optical

distribution cables for use in premises cabling

Câbles à fibres optiques –
Partie 2-21: Câbles intérieurs – Spécification particulière pour les câbles

optiques multifibres de distribution utilisés dans le câblage de locaux

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-6758-5

– 2 – IEC 60794-2-21:2019 © IEC 2019
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 6
5 Particular requirements . 6
5.1 Fibre selection for cable testing . 6
5.2 Environmental requirements – Temperature cycling . 6
5.3 Transmission requirements . 7
5.3.1 Attenuation of cabled fibre . 7
5.3.2 Fibre bandwidth requirements . 7
Bibliography . 8

Table 1 – Multimode cable maximum attenuation coefficient (dB/km) . 7
Table 2 – Single-mode cable maximum attenuation coefficient (dB/km) . 7
Table 3 – Minimum multimode fibre bandwidth (MHz·km) . 7

IEC 60794-2-21:2019 © IEC 2019 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 2-21: Indoor cables –
Detailed specification for multi-fibre optical distribution cables
for use in premises cabling
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 60794-2-21 has been prepared by subcommittee 86A: Fibres and
cables, of IEC technical committee 86: Fibre optics.
This third edition cancels and replaces the second edition published in 2012. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) incorporation of the OM5 cabled fibre performance category;
b) incorporation of the OS1a cabled fibre performance category;
c) cabled fibre performance categories OM1, OM2 and OS1 are no longer normative, and are
retained for information.
– 4 – IEC 60794-2-21:2019 © IEC 2019
The text of this International Standard is based on the following documents:
FDIS Report on voting
86A/1925/FDIS 86A/1935RVD
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.
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 "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.
...