EN 60794-2-51:2014

SLOVENSKI STANDARD
01-april-2015
2SWLþQLNDEOLGHO1RWUDQMLRSWLþQLNDEOL3RGUREQDVSHFLILNDFLMD]D
VLPSOHNVQHLQGXSOHNVQHNDEOHXSRUDEOMHQH]DYUYLFHYQDG]RURYDQHPRNROMX,(&

Optical fibre cables - Part 2-51: Indoor optical fibre cables - Detail specification for
simplex and duplex cables for use in cords for controlled environment (IEC 60794-2-
51:2014)
/LFKWZHOOHQOHLWHUNDEHO7HLO/:/,QQHQNDEHO%DXDUWVSH]LILNDWLRQIU6LPSOH[XQG
'XSOH[NDEHO]XU9HUZHQGXQJLQ.DEHOQIUNRQWUROOLHUWH8PJHEXQJVEHGLQJXQJHQ
,(&
Câbles à fibres optiques - Partie 2-51: Câbles à fibres optiques intérieurs - Spécification
particulière pour les câbles simplex et duplex pour usage en cordons en environnement
contrôlé (IEC 60794-2-51:2014)
Ta slovenski standard je istoveten z: EN 60794-2-51:2014
ICS:
33.180.10 2SWLþQDYODNQDLQNDEOL Fibres and cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60794-2-51

NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2014
ICS 33.180.10
English Version
Optical fibre cables - Part 2-51: Indoor cables - Detail
specification for simplex and duplex cables for use in cords for
controlled environment
(IEC 60794-2-51:2014)
Câbles à fibres optiques - Partie 2-51: Câbles intérieurs - Lichtwellenleiterkabel - Teil 2-51: LWL-Innenkabel -
Spécification particulière pour les câbles simplex et duplex Bauartspezifikation für Simplex- und Duplexkabel zur
pour usage en cordons en environnement contrôlé Verwendung in Kabeln für kontrollierte
(CEI 60794-2-51:2014) Umgebungsbedingungen
(IEC 60794-2-51:2014)
This European Standard was approved by CENELEC on 2014-07-15. 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, 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: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60794-2-51:2014 E
Foreword
The text of document 86A/1599/FDIS, future edition 1 of IEC 60794-2-51, 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 60794-2-51:2014.

The following dates are fixed:
• latest date by which the document has to be (dop) 2015-04-15
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2017-07-15
• latest date by which the national
standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 60794-2-51:2014 was approved by CENELEC as a
European Standard without any modification.

- 3 - EN 60794-2-51:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When 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

IEC 60793-2-10 2011 Optical fibres -- Part 2-10: Product EN 60793-2-10 2011
specifications - Sectional specification for
category A1 multimode fibres
IEC 60793-2-50 2012 Optical fibres -- Part 2-50: Product EN 60793-2-50 2013
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 60794-1-2 -
specification - Cross reference table for
optical cable test procedures
IEC 60794-1-22 -  Optical fibre cables -- Part 1-22: Generic EN 60794-1-22 -
specification - Basic optical cable test
procedures - Environmental test methods
IEC 60794-2-50 2008 Optical fibre cables -- Part 2-50: Indoor EN 60794-2-50 2008
cables - Family specification for simplex
and duplex cables for use in terminated
cable assemblies
IEC 60811-201 -  Electric and optical fibre cables - Test EN 60811-201 -
methods for non-metallic materials -- Part
201: General tests - Measurement of
insulation thickness
IEC 61753-1 -  Fibre optic interconnecting devices and EN 61753-1 -
passive components performance standard
-- Part 1: General and guidance for
performance standards
IEC/TR 62225 -  Guidance on terms for connectors and - -
mechanical structures in electronic
equipment
IEC 60794-2-51 ®
Edition 1.0 2014-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 2-51: Indoor cables – Detail specification for simplex and duplex cables for

use in cords for controlled environment

Câbles à fibres optiques –
Partie 2-51: Câbles intérieurs – Spécification particulière pour les câbles

simplex et duplex pour usage en cordons en environnement contrôlé

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX L
ICS 33.180.10 ISBN 978-2-8322-1636-1

– 2 – IEC 60794-2-51:2014 © IEC 2014
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 Wavelength . 6
5.2 No change in attenuation . 6
5.3 Buffer strippability . 6
5.4 Dimensional requirements . 7
5.4.1 Buffer diameter . 7
5.4.2 Cable diameter . 7
5.4.3 Sheath thickness . 8
5.5 Mechanical requirements . 8
5.5.1 General . 8
5.5.2 Tensile performance . 8
5.5.3 Crush . 8
5.5.4 Impact . 9
5.5.5 Repeated bending . 9
5.5.6 Bend . 9
5.5.7 Buffered fibre movement in compression . 10
5.6 Environmental requirements . 10
5.6.1 Temperature cycling . 10
5.6.2 Sheath shrinkage . 10
5.7 Transmission requirements – Cabled fibre attenuation . 11
5.8 Fire performance . 11

Table 1 – No change in attenuation . 6
Table 2 – Strippability requirements . 7
Table 3 – Buffer diameter . 7
Table 4 – Simplex cable diameter . 7
Table 5 – Duplex round cable diameter . 7
Table 6 – Duplex zip-cord cable dimension . 7
Table 7 – Sheath shrinkage grades . 11
Table 8 – Cabled multimode fibre maximum attenuation coefficient (dB/km) . 11
Table 9 – Cabled singlemode fibre maximum attenuation coefficient (dB/km) . 11

IEC 60794-2-51:2014 © IEC 2014 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 2-51: Indoor cables –
Detail specification for simplex and duplex cables
for use in cords for controlled environment

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 respons
...