BS EN 60794-2-21:2012 BSI Standards Publication Optical fibre cables Part 2-21: Indoor optical fibre cables — Detailed specification for multi-fibre optical distribution cables for use in premises cabling BRITISH STANDARD BS EN 60794-2-21:2012 National foreword This British Standard is the UK implementation of EN 60794-2-21:2012 It is identical to IEC 60794-2-21:2012 It supersedes BS EN 60794-2-21:2006, which is withdrawn The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/1, Optical fibres and cables A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2012 Published by BSI Standards Limited 2012 ISBN 978 580 71602 ICS 33.180.10 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2012 Amendments issued since publication Amd No Date Text affected BS EN 60794-2-21:2012 EUROPEAN STANDARD EN 60794-2-21 NORME EUROPÉENNE August 2012 EUROPÄISCHE NORM ICS 33.180.10 Supersedes EN 60794-2-21:2006 English version Optical fibre cables Part 2-21: Indoor optical fibre cables Detailed specification for multi-fibre optical distribution cables for use in premises cabling (IEC 60794-2-21:2012) Câbles fibres optiques Partie 2-21: Câbles fibres optiques intérieurs Spécification particulière pour les câbles optiques multi-fibres de distribution utilisés dans le câblage de locaux (CEI 60794-2-21:2012) Lichtwellenleiterkabel Teil 2-21: LWL-Innenkabel Bauartspezifikation für Mehrfaserverteilerkabel zur Innenverlegung für anwendungsneutrale Standortverkabelung (IEC 60794-2-21:2012) This European Standard was approved by CENELEC on 2012-06-19 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 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels © 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 60794-2-21:2012 E BS EN 60794-2-21:2012 EN 60794-2-21:2012 Foreword The text of document 86A/1441/FDIS, future edition 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 60794-2-21:2012 The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-03-19 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2015-06-19 This document supersedes EN 60794-2-21:2006 EN 60794-2-21:2012 includes EN 60794-2-21:2006: the following significant technical changes with - incorporation of the OM4 cabled fibre performance category; - incorporation of the OS2 cabled fibre performance category; - incorporation of the B6_a1 and B6_a2 fibre category as per EN 60793-2-50:2008 respect to 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 60794-2-21:2012 was approved by CENELEC as a European Standard without any modification BS EN 60794-2-21:2012 EN 60794-2-21:2012 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 When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies Publication Year Title EN/HD IEC 60793-2-10 2007 Optical fibres Part 2-10: Product specifications Sectional specification for category A1 multimode fibres EN 60793-2-10 IEC 60793-2-50 2008 Optical fibres EN 60793-2-50 Part 2-50: Product specifications - Sectional specification for class B single-mode fibres 2008 IEC 60794-1-1 + corr January 2011 2012 Optical fibre cables Part 1-1: Generic specification - General EN 60794-1-1 2011 IEC 60794-1-2 2003 Optical fibre cables EN 60794-1-2 Part 1-2: Generic specification - Basic optical cable test procedures 2003 IEC 60794-2 2002 Optical fibre cables Part 2: Indoor cables - Sectional specification IEC 60794-2-20 2008 EN 60794-2-20 Optical fibre cables Part 2-20: Indoor cables - Family specification for multi-fibre optical distribution cables 1) EN 60794-2 EN 60793-2-10 is superseded by EN 60793-2-10:2011, which is based on IEC 60793-2-10:2011 Year 1) 2007 2003 2010 BS EN 60794-2-21:2012 60794-2-21 © IEC:2012 CONTENTS Scope Normative References General requirements Particular requirements 4.1 4.2 4.3 Fibre selection for cable testing Environmental requirements – Temperature cycling Transmission requirements 4.3.1 Attenuation of cabled fibre 4.3.2 Fibre bandwidth requirements Bibliography Table – Multimode maximum cable attenuation coefficient (dB/km) Table – Single-mode maximum cable attenuation coefficient (dB/km) Table – Minimum multimode fibre bandwidth (MHz × km) BS EN 60794-2-21:2012 60794-2-21 © IEC:2012 –5– OPTICAL FIBRE CABLES – Part 2-21: Indoor optical fibre cables – Detailed specification for multi-fibre optical distribution cables for use in premises cabling Scope This International Standard presents the detailed requirements specific to this type of cable to ensure compatibility with ISO/IEC 11801, Information technology − Generic cabling for customer premises The requirements of the Family Specification IEC 60794-2-20:2008 are applicable to cables covered by this standard Particular requirements detailed in clause either define a specific option relative to the requirements of IEC 60794-2-20:2008 or define additional requirements Normative References 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 They complete the normative references already listed in the generic specification (IEC 60794-1-1:2011 and IEC 60794-1-2:2003,) and in the sectional specification (IEC 60794-2:2002, Clause 2) or in the family specification (IEC 60794-2-20:2011, Clause 2) IEC 60793-2-10:2007, Optical fibres – Part 2-10: Product specifications − Sectional specification for category A1 multimode fibres IEC 60793-2-50:2008, Optical fibres − Part 2-50: Product specifications − Sectional specification for class B single-mode fibres IEC 60794-1-1:2011, Optical Fibre cables – Part 1-1: Generic specification – General IEC 60794-1-2:2003, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test procedures IEC 60794-2:2002, Optical fibre cables – Part 2: Indoor cables – Sectional specification IEC 60794-2-20:2008, Optical fibre cables − Part 2-20: Indoor cables − Family specification for multi-fibre optical distribution cable General requirements The cable shall comply with the family specification (IEC 60794-2-20:2008) and meet the requirements that are defined in it The optical fibre contained in the cables which are covered by this standard shall comply with one of the following standards and meet the normative requirements defined within them as applicable: –6– BS EN 60794-2-21:2012 60794-2-21 © IEC:2012 • IEC 60793-2-50:2008, Annex A [Single-mode B1.1 fibre] • IEC 60793-2-50:2008, Annex C [Single-mode B1.3 fibre] • IEC 60793-2-50:2008, Annex G [Single-mode B6_a1 and B6_a2 fibre] • IEC 60793-2-10:2007, Annex A [Multimode A1a.1, 50 àm core fibre] ã IEC 60793-2-10:2007, Annex A [Multimode A1a.2, 50 àm core fibre] ã IEC 60793-2-10:2007, Annex A [Multimode A1a.3, 50 àm core fibre] ã IEC 60793-2-10:2007, Annex B [Multimode A1b, 62.5 µm core fibre] To ensure compatibility with ISO/IEC 11801, optical performance level requirements are presented in terms of the performance classification codes for cabled optical fibre as follows: • OS1 Single-mode fibre, B1.1, B1.3 category or sub-category B6_a1 and B6_a2; • OS2 Single-mode fibre, B1.3 or sub-category B6_a1 and B6_a2; • OM1 Multimode fibre, Model A1a.1 or sub-category A1b; • OM2 Multimode fibre, Model A1a.1 or sub-category A1b; • OM3 Multimode fibre, Model A1a.2; • OM4 Multimode fibre, Model A1a.3; NOTE These codes are informative from the perspective of the requirements defined in this detailed specification Particular requirements 4.1 Fibre selection for cable testing The fibre selection for cable testing shall be performed according to the 60794-1-1:2011, Annex B 4.2 Environmental requirements – Temperature cycling The cable shall meet the requirement of IEC 60794-2-20:2008, clause 4.3 Table 2, option c (–20 °C to +60 °C) The test shall be performed on a 50 m specimen No attenuation changes (according to the IEC 60794-1-1 annex B3) shall be allowed during the test 4.3 4.3.1 Transmission requirements Attenuation of cabled fibre Depending on the fibre category, the attenuation coefficient of the cabled fibre shall be less than the maximum values in Table for the multimode fibres and less than the maximum values in Table for single-mode fibres – for the wavelengths listed in Table The fibre category shall be agreed between customer and supplier BS EN 60794-2-21:2012 60794-2-21 © IEC:2012 –7– Table – Multimode maximum cable attenuation coefficient (dB/km) Fibre Attenuation coefficient at 850 nm Attenuation coefficient at 1300 nm Performance codes IEC 60793-2-10:2007, A1a.1 3,5 1,5 OM1 OM2 IEC 60793-2-10:2007, A1a.2 3,5 1,5 OM1 OM2 OM3 IEC 60793-2-10:2007, A1a.3 3,5 1,5 OM1 OM2 OM3 OM4 IEC 60793-2-10:2007, A1b 3,5 1,5 OM1 OM2 Table – Single-mode maximum cable attenuation coefficient (dB/km) Fibre 4.3.2 Wavelengths (nm) Maximum attenuation coefficient Performance codes IEC 60793-2-50:2008, B1.1, B1.3, B6_a1, B6_a2 310, 550 1,0 OS1 IEC 60793-2-50:2008, B1.1, B1.3, B6_a1, B6_a2 310, 383, 550 0,4 OS2 Fibre bandwidth requirements There are no bandwidth requirements on single-mode fibre For cables containing multimode fibres, the uncabled fibre shall be specified at one of performance levels defined in Table in terms of minimum bandwidth (MHz × km), wavelength, and type of measurement The fibre category and performance level shall be agreed between customer and supplier Table – Minimum multimode fibre bandwidth (MHz ì km) Fibre Nominal core diameter (àm) Overfilled bandwidth at 850 nm Overfilled bandwidth at 1300 nm Effective modal bandwidth at 850 nm* Performance codes IEC 60793-2-10:2007, A1a.1 50 200 500 na OM1 IEC 60793-2-10:2007, A1a.1 50 500 500 na OM2 IEC 60793-2-10:2007, A1a.2 50 500 500 000 OM3 IEC 60793-2-10:2007, A1a.3 50 500 500 700 OM4 IEC 60793-2-10:2007, A1b 62,5 200 500 na OM1 IEC 60793-2-10:2007, A1b 62,5 500 500 na OM2 –8– BS EN 60794-2-21:2012 60794-2-21 © IEC:2012 Bibliography ISO/IEC 11801, Information technology − Generic cabling for customer premises _ This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter 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