1、BSI Standards PublicationOptical fibre cablesPart 2-20: Indoor cables Family specification for multi-fibre optical cablesBS EN 60794-2-20:2014National forewordThis British Standard is the UK implementation of EN 60794-2-20:2014. It isidentical to IEC 60794-2-20:2013. It supersedes BS EN 60794-2-20:2
2、010which is withdrawn.The UK participation in its preparation was entrusted by Technical Com-mittee GEL/86, Fibre optics, to Subcommittee GEL/86/1, Optical fibres and cables.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not pur
3、port to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 78022 6ICS 33.180.01Compliance with a British Standard cannot confer immunity fromlegal obligatio
4、ns.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2014.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60794-2-20:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60794-2-20 May 2014 ICS 3
5、3.180.01 Supersedes EN 60794-2-20:2010 English Version Optical fibre cables - Part 2-20: Indoor cables - Family specification for multi-fibre optical cables (IEC 60794-2-20:2013) Optical fibre cables - Part 2-20: Indoor cables - Family specification for multi-fibre optical cables (CEI 60794-2-20:201
6、3) Lichtwellenleiterkabel - Teil 2-20: LWL-Innenkabel - Familienspezifikation fr Mehrfaser-Lichtwellenleiterkabel (IEC 60794-2-20:2013) This European Standard was approved by CENELEC on 2013-12-10. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the cond
7、itions 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 e
8、xists 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 n
9、ational 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,
10、Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17,
11、B-1000 Brussels 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60794-2-20:2014 E BS EN 60794-2-20:2014EN 60794-2-20:2014 - 2 - Foreword The text of document 86A/1513/FDIS, future edition 3 of IEC 60794-2-20, prepared by SC 86A
12、, “Fibres and cables“, of IEC TC 86, “Fibre optics“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60794-2-20:2014. 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
13、or by endorsement (dop) 2014-11-16 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2016-12-10 This document supersedes EN 60794-2-20:2010. EN 60794-2-20:2014 includes the following significant technical changes with respect to EN 60794-2-20:2010:
14、removal of Annex C; reference to the most recent fibre standards; reference to the new series EN 60794-1-2X. This standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2 and IEC 60794-2. Attention is drawn to the possibility that some of the elements of this document may be the subje
15、ct 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 60794-2-20:2013 was approved by CENELEC as a European Standard without any modification. In the official version, for Bib
16、liography, the following notes have to be added for the standards indicated: IEC 60654 (Series) NOTE Harmonized as EN 60654 (Series) (not modified). IEC 60721-1 NOTE Harmonized as EN 60721-1 (not modified). IEC 60721-3-3 NOTE Harmonized as EN 60721-3-3 (not modified). IEC 61000-6-2 NOTE Harmonized a
17、s EN 61000-6-2 (not modified). IEC 61326 (Series) NOTE Harmonized as EN 61326 (Series) (not modified). IEC 61918 NOTE Harmonized as EN 61918 (modified). BS EN 60794-2-20:2014- 3 - EN 60794-2-20:2014 Annex ZA (normative) Normative references to international publications with their corresponding Euro
18、pean 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
19、) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. To be used together with the Annexes ZA of EN 60794-1-1 and EN 60794-1-2. Publication Year Title EN/HD Year IEC 60189-1 Low-frequency cables and wires with PVC
20、 insulation and PVC sheath - Part 1: General test and measuring methods - - IEC 60304 Standard colours for insulation for low-frequency cables and wires HD 402 S2 IEC 60793-1-20 Optical fibres - Part 1-20: Measurement methods and test procedures - Fibre geometry EN 60793-1-20 IEC 60793-1-21 Optical
21、fibres - Part 1-21: Measurement methods and test procedures - Coating geometry EN 60793-1-21 IEC 60793-2-10 Optical fibres - Part 2-10: Product specifications - Sectional specification for category A1 multimode fibres EN 60793-2-10 IEC 60793-2-50 + corr. January Optical fibres - Part 2-50: Product s
22、pecifications - Sectional specification for class B single-mode fibres EN 60793-2-50 IEC 60794-1-1 + corr. January Optical fibre cables - Part 1-1: Generic specification - General EN 60794-1-1 IEC 60794-1-2 Optical fibre cables - Part 1-2: Generic specification - Cross reference table for optical ca
23、ble test procedures EN 60794-1-2 IEC 60794-1-20 Optical fibre cables - Part 1-20: Generic specification - Basic optical cable test procedures - General and Definitions FprEN 60794-1-20 IEC 60794-1-22 Optical fibre cables - Part 1-22: Generic specification - Basic optical cable test procedures - Envi
24、ronmental test methods EN 60794-1-22 IEC 60794-1-23 Optical fibre cables - Part 1-23: Generic specification - Basic optical cable test procedures - Cable element test methods EN 60794-1-23 IEC 60794-2 2002 Optical fibre cables - Part 2: Indoor cables - Sectional specification EN 60794-2 2003 IEC 607
25、94-3 2001 Optical fibre cables - Part 3: Sectional specification - Outdoor cables EN 60794-3 2002 BS EN 60794-2-20:2014EN 60794-2-20:2014 - 4 - IEC 60811-202 Electric and optical fibre cables - Test methods for non-metallic materials - Part 202: General tests - Measurement of thickness of non-metall
26、ic sheath EN 60811-202 IEC 60811-203 Electric and optical fibre cables - Test methods for non-metallic materials - Part 203: General tests - Measurement of overall dimensions EN 60811-203 IEC 60811-504 Electric and optical fibre cables - Test methods for non-metallic materials - Part 504: Mechanical
27、 tests - Bending tests at low temperature for insulation and sheaths EN 60811-504 IEC/TR 62222 Fire performance of communication cables installed in buildings - - BS EN 60794-2-20:2014 2 60794-2-20 IEC:2013 CONTENTS 1 Scope . 6 2 Normative references . 6 3 Construction . 7 General . 7 3.1Optical fib
28、res . 7 3.2Buffer 7 3.3Ruggedized fibre . 8 3.4Slotted core . 8 3.5Tube 8 3.6Stranded tube 8 3.7Ribbon structure 8 3.8Strength and anti-buckling members 8 3.9Ripcord . 8 3.10Sheath 8 3.11Sheath marking . 9 3.12Identification 9 3.13Examples of cable constructions . 9 3.144 Tests 9 General . 9 4.1Dime
29、nsions . 9 4.2Mechanical requirements . 9 4.3Cable tensile performance . 9 4.3.1Cable crush . 10 4.3.2Cable impact . 10 4.3.3Cable bending . 10 4.3.4Cable repeated bending. 10 4.3.5Cable bending under tension . 10 4.3.6Cable bending at low temperature . 11 4.3.7Cable flexing . 11 4.3.8Cable torsion
30、. 11 4.3.9Cable kink . 11 4.3.10Environmental requirements Temperature cycling. 11 4.4Transmission requirements 12 4.5Fire performance . 12 4.6Annex A (informative) Examples of cable constructions . 13 Annex B (informative) Family specification for multi-fibre optical cables Blank detail specificati
31、on and minimum requirements . 17 Bibliography 22 Figure A.1 Example of cross-section of a 12 fibre cable . 13 Figure A.2 Example of cross-section of a 36 fibre cable . 13 Figure A.3 Example of cross-section of a 6 fibre break-out cable . 14 Figure A.4 Example of cross-section of a 24 fibre break-out
32、 cable . 14 Figure A.5 Example of cross-section of a slotted core type indoor cable with 4 fibre ribbons . 15 BS EN 60794-2-20:201460794-2-20 IEC:2013 3 Figure A.6 Example of cross-section of an SZ (reverse oscillating lay) slotted core type indoor cable with 2 fibre ribbons 15 Figure A.7 Example of
33、 cross-section of an SZ (reverse oscillating lay) slotted core type indoor cable with 4 fibre bundles . 16 Figure A.8 Example of multi-fibre unitube cable . 16 Figure A.9 Example of multi-fibre cable 16 Table 1 Dimensions of buffered fibres 8 Table 2 Sample temperature cycling values . 12 Table B.1
34、Cable description (1 of 2) . 17 Table B.2 Cable element 18 Table B.3 Cable construction . 19 Table B.4 Installation and operating conditions 20 Table B.5 Tests applicable . 20 BS EN 60794-2-20:2014 6 60794-2-20 IEC:2013 OPTICAL FIBRE CABLES Part 2-20: Indoor cables Family specification for multi-fib
35、re optical cables 1 Scope This part of IEC 60794 is a family specification covering multi-fibre optical cables for indoor use. The requirements of the sectional specification IEC 60794-2 are applicable to cables covered by this standard. Annex B contains a Blank Detail Specification and general guid
36、ance in case the cables are intended to be used in installation governed by the MICE table of ISO/IEC 24702 (Industrial premises) 111. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated
37、 references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE These reference complete the normative references already listed in the generic specification (IEC 60794-1-1 and IEC 60794-1-2). IEC 60189-1, Lo
38、w-frequency cables and wires with PVC insulation and PVC sheath Part 1: General test and measuring methods IEC 60304, Standard colours for insulation for low-frequency cables and wires IEC 60793-1-20, Optical fibres Part 1-20: Measurement methods and test procedures Fibre geometry IEC 60793-1-21, Op
39、tical fibres Part 1-21: Measurement methods and test procedures Coating geometry 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 clas
40、s 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 IEC 60794-1-20, Optical fibre cables Part 1-20: Generic specification Basic optical cable test pr
41、ocedures General and definitions2_ 1Figures in square brackets refer to the Bibliography. 2 To be published. BS EN 60794-2-20:201460794-2-20 IEC:2013 7 IEC 60794-1-22, Optical fibre cables Part 1-22: Generic specification Basic optical cable test procedures Environmental test methods IEC 60794-1-23,
42、 Optical fibre cables Part 1-23: Generic specification Basic optical cable test procedures Cable element test methods IEC 60794-2:2002, Optical fibre cables Part 2: Indoor cables Sectional specification IEC 60794-3:2001, Optical fibre cables Part 3: Sectional specification Outdoor cables IEC 60811-2
43、02, 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. IE
44、C 60811-504, Electric and optical fibre cables Test methods for non-metallic materials Part 504: Mechanical tests Bending tests at low temperature for insulation and sheaths IEC/TR 62222, Fire performance of communication cables installed in buildings 3 Construction General 3.1In addition to the con
45、structional requirements in IEC 60794-2, the following considerations apply to multi-fibre indoor cables. The cable shall be designed and manufactured for an expected operating lifetime of at least 15 years. In this context, the attenuation at the operational wavelength(s) of the optical fibres cont
46、ained in the installed cable shall not exceed values agreed between customer and supplier. The materials in the cable shall not present a health or environmental hazard within its intended use. There shall be no fibre splice in a delivery length unless otherwise agreed by customer and supplier. It s
47、hall be possible to identify each individual fibre throughout the length of the cable. Optical fibres 3.2Class A1 multimode fibres which meet the requirements of IEC 60793-2-10 or class B sub-categories B1.1, B1.3, B6_a, and B6_b single-mode optical fibres which meet the requirements of IEC 60793-2-
48、50 shall be used. The linear coefficient of optical fibre attenuation and attenuation point discontinuity may be affected by the cable manufacturing process. Maximum values for these optical characteristics shall be agreed between customer and supplier. Buffer 3.3If a tight or semi-tight (loosely ap
49、plied) buffer is required, it shall consist of one or more layers of inert material. The buffer shall be easily removable. For tight buffers, the buffer and fibre primary coating shall be removable in one operation over a length of 15 mm to 25 mm, depending on customer requirements. For semi-tight buffers, the buffer shall be easily removable over a length of 0,3 m to 2,0 m. Buffer dimensions are shown in Ta
