1、BRITISH STANDARDBS EN 60794-2-42:2008Optical fibre cables Part 2-42: Indoor optical fibre cables Product specification for simplex and duplex cables with A4 fibresICS 33.180.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g
2、3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60794-2-42:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 August 2008 BSI 2008ISBN 978 0 580 55793 4National forewordThis British Standard is the UK imp
3、lementation of EN 60794-2-42:2008. It is identical to IEC 60794-2-42:2008.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 re
4、quest to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate Commen
5、tsEUROPEAN STANDARD EN 60794-2-42 NORME EUROPENNE EUROPISCHE NORM June 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2008
6、 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60794-2-42:2008 E ICS 33.180.10 English version Optical fibre cables - Part 2-42: Indoor optical fibre cables - Product specification for simplex and duplex cables with A4 fibres (I
7、EC 60794-2-42:2008) Cbles fibres optiques - Partie 2-42: Cbles intrieurs fibres optiques - Spcification de produit pour les cbles simplex et duplex munis de fibres A4 (CEI 60794-2-42:2008) Lichtwellenleiterkabel - Teil 2-42: LWL-Innenkabel - Produktspezifikation fr Simplex- und Duplexkabel mit Faser
8、n der Kategorie A4 (IEC 60794-2-42:2008) This European Standard was approved by CENELEC on 2008-05-01. 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 alterati
9、on. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by trans
10、lation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Fi
11、nland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 86A/1126/CDV, future edition 1 of IEC 60794
12、-2-42, prepared by SC 86A, Fibres and cables, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel Unique Acceptance Procedure and was approved by CENELEC as EN 60794-2-42 on 2008-05-01. This standard is to be used in conjunction with EN 60794-1-1, EN 60794-1-2 and EN 60794-2. The f
13、ollowing dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-02-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-05-01 Annex ZA has be
14、en added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60794-2-42:2008 was approved by CENELEC as a European Standard without any modification. _ BS EN 60794-2-42:2008 2 CONTENTS 1 Scope.4 2 Normative references .4 3 Construction.5 3.1 General .5 3.2 Optical fibres.5 3.
15、3 Buffer 5 3.4 Ruggedized fibre .5 3.5 Tube5 3.6 Strength and anti-buckling members .6 3.7 Sheath 6 3.8 Sheath marking .6 3.9 Examples of cable constructions .6 4 Tests 6 4.1 General .6 4.2 Dimensions .6 4.3 Mechanical requirements.6 4.4 Environmental requirements Temperature cycling 9 4.5 Transmiss
16、ion requirements .9 4.6 Fire performance.9 Annex A (informative) Examples of cable constructions .10 Annex B (informative) Blank Detail Specification (BDS) .13 Bibliography23 Figure A.1 Simplex loose non-buffered fibre cable .10 Figure A.2 Simplex ruggedized fibre cable .10 Figure A.3 Duplex loose n
17、on-buffered fibre cable.10 Figure A.4 Duplex ruggedized fibre cable.11 Figure A.5 Duplex ruggedized fibre zip cord.11 Figure A.6 Duplex flat cable.11 Figure A.7 Duplex round cable.12 Figure A.8 Duplex flat cable.12 Table 1 Temperature cycling9 Annex ZA (normative) Normative references to internation
18、al publications with their corresponding European publications.24 3 BS EN 60794-2-42:2008OPTICAL FIBRE CABLES Part 2-42: Indoor optical fibre cables Product specification for simplex and duplex cables with A4 fibres 1 Scope This part of IEC 60794 covers simplex and duplex optical fibre cables contai
19、ning A4 fibres for indoor use. The requirements of the sectional specification IEC 60794-2 are applicable to cables covered by this standard. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited
20、 applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60189-1: Low-frequency cables and wires with PVC insulation and PVC sheath Part 1: General test and measuring methods IEC 60654-4, Operating conditions for industrial-process measu
21、rement and control equipment Part 4: Corrosive and erosive influences IEC 60721-1, Classification of environmental conditions Part 1: Environmental parameters and their severities IEC 60721-3-3, Classification of environmental conditions Part 3: Classification of groups of environmental parameters a
22、nd their severities Section 3: Stationary use at weather protected locations 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 60793-2-40, Optical fib
23、res Part 2-40: Product specifications Sectional specification for category A4 multimode 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 60794-2: Optical fibr
24、e cables Part 2: Indoor cables Sectional specification IEC 60811-1-1, Common test methods for insulating and sheathing materials of electric cables and optical cables Part 1-1: Methods for general application Measurement of thickness and overall dimensions Tests for determining the mechanical proper
25、ties IEC 60811-1-4:1985, Common test methods for insulating and sheathing materials of electric cables Part 1: Methods for general application Section 4: Tests at low temperature BS EN 60794-2-42:2008 4 IEC 61000-2-5, Electromagnetic compatibility (EMC) Part 2: Environment Section 5: Classification
26、of electromagnetic environments Basic EMC publication IEC 61000-6-2, Electromagnetic compatibility (EMC) Part 6-2: Generic standards Immunity for industrial environments IEC 61326 (all parts), Electrical equipment for measurement, control and laboratory use EMC ISO/IEC 11801: Information technology
27、Generic cabling for customer premises ISO/IEC 24702: Information technology Generic cabling Industrial premises 3 Construction 3.1 General In addition to the constructional requirements in IEC 60794-2, the following considerations apply to simplex and duplex indoor cables. The cable shall be designe
28、d and manufactured for an expected operating lifetime of at least 15 years. In this context, the attenuation of the installed cable at the operational wavelength(s) shall not exceed values agreed between customer and supplier. The materials in the cable shall not present a health hazard within its i
29、ntended use. There shall be no fibre splice in a delivery length unless otherwise agreed by customer and supplier. It shall be possible to identify each individual fibre throughout the length of the cable. 3.2 Optical fibres Multimode category A4a through A4g optical fibres shall be used that meet t
30、he requirements of IEC 60793-2-40. 3.3 Buffer The buffer, if any, shall consist of one or more layers of inert material. For tight buffer, the buffer shall be easily removable in one operation over a length of 15 mm to 25 mm, depending on customer requirements. For semi-tight buffers, the buffer sha
31、ll be easily removable over a length of 0,2 m to 2,0 m. 3.4 Ruggedized fibre Further protection can be provided to buffered fibres by surrounding one or two with non-metallic strength members within a sheath of suitable material. 3.5 Tube One or two identified primary coated or buffered fibres may b
32、e packaged (loosely or not) in a tube construction, which may be filled. 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 60794-1-2, Method G7. 5 BS EN 60794-2-42:20083.6 Stre
33、ngth and anti-buckling members The cable shall be designed with sufficient strength members to meet installation and service conditions thus enabling fibres not to be subjected to strain in excess of limits in 4.2.1. The strength and/or anti-buckling member may be located in the cable core and/or un
34、der the sheath and/or in the sheath. 3.7 Sheath The cable shall have an overall protective sheath. The cable diameter shall be specified by agreement between customer and supplier. 3.8 Sheath marking If required, the cable shall be marked as agreed between the customer and supplier. 3.9 Examples of
35、cable constructions Examples of some main types of cable construction are shown in Figures A.1 to A.8. Other configurations are not excluded if they meet the mechanical, environmental and transmission requirements given in this specification. 4 Tests 4.1 General Compliance with specification require
36、ments shall be verified by carrying out tests selected from the following subclauses. It is not intended that all tests shall be performed. The frequency of testing shall be agreed between customer and supplier. Unless otherwise specified, all tests shall be carried out at ambient temperature. 4.2 D
37、imensions The fibre dimensions and tolerances shall be checked in accordance with test method IEC 60793-1-20 or IEC 60793-1-21. The diameter of the buffer and of the cable, as well as the thickness of the sheath, shall be measured in accordance with the methods of IEC 60189-1. 4.3 Mechanical require
38、ments 4.3.1 General Some of the following tests can be performed on a short sample length of cable that is still an integral part of a longer length. Thus it becomes possible to detect permanent changes in attenuation. Launch conditions to measure changes in attenuation shall be in conformity with I
39、EC 60793-2-40. 4.3.2 Tensile performance Method IEC 60794-1-2-E1A Diameter of chuck drums and transfer devices: approximately 250 mm. Rate of transfer device: either 100 mm/min or 100 N/min. Load: 100 N applied for 5 min for simplex cables, 200 N for 5 min for duplex cables. BS EN 60794-2-42:2008 6
40、Length of sample: sufficient to achieve the desired accuracy of measurement of attenuation change and shall be agreed between customer and supplier. Requirements: change in attenuation less than 0,2 dB after the test and there shall be no damage to the cable elements. 4.3.3 Crush Method: IEC 60794-1
41、-2-E3. Force: 1 000 N. Duration: 1 min. Number of test locations: 3, at least 500 mm apart. Requirements: change in attenuation shall not exceed 0,2 dB after the test. Under visual examination, there shall be no damage to the cable elements. NOTE In the case of flat cables the force should be applie
42、d on the flat sides of the cable. 4.3.4 Impact Method: IEC 60794-1-2-E4. Radius of striking surface: 12,5 mm. Impact energy: 1J. Number of impacts: at least 3, each separated at least 500 mm. Requirements: change in attenuation shall not exceed 0,2 dB after the test. Under visual examination without
43、 magnification there shall be no damage to the sheath and to the cable elements. The imprint of the striking surface on the sheath is not considered mechanical damage. NOTE In the case of flat cables the force should be applied on the flat sides of the cable. 4.3.5 Bend Method: IEC 60794-1-2-E11A Ma
44、ndrel diameter: 10 times cable diameter (for flat cables, the diameter is the minor dimension). Number of turns per helix: 6. Number of cycles: 10. Requirements: change in attenuation should be less than 0,2 dB after test. Under visual examination, there shall be no damage to the sheath or cable ele
45、ment. NOTE In the case of flat cables the force should be applied on the flat sides of the cable. 4.3.6 Repeated bending Method: IEC 60794-1-2-E6. 7 BS EN 60794-2-42:2008Bending radius: 5 times cable diameter (for flat cables, the diameter is the minor dimension). Number of cycles: 300. Mass of weig
46、hts: 2 kg. Requirements: change in attenuation shall not exceed 0,2 dB after the test. Under visual examination without magnification there shall be no damage to the sheath and to the cable elements. NOTE In the case of flat cables, the sample should be fixed to the apparatus so that bending is perp
47、endicular to the flat surface of the cable. 4.3.7 Bend at low temperature Method: IEC 60794-1-2-E11A (see IEC 60811-1-4, Clause 8). Bending radius: 10 times cable diameter (for flat cables, the diameter is the minor dimension). Number of cycles: 2. Test temperature: 0 C, 10 C or 15 C depending on ap
48、plication and customer requirements. Number of turns per helix:according to Clause 8 of IEC 60811-1-4. Requirements: in addition to the requirement of Clause 8 of IEC 60811-1-4, no fibre shall break during the test. 4.3.8 Flexing Method: IEC 60794-1-2-E8. Number of cycles: 300. Pulley diameter: 100
49、mm. Mass of weights: 2 kg. Requirement: no fibre breakage. NOTE In the case of flat cables the force shall be applied on the flat sides of the cable. 4.3.9 Torsion Method: IEC 60794-1-2-E7. Number of cycles: 20. Distance between fixed and rotating clamp: 250 mm. Tension load: 20 N. Requirements: no fibre breakage. BS EN 60794-2-42:2008 8 4.3.10 Kink Method: IEC 60794-1-2-E10. Minimum loop diameter: 20 times cable diameter (for flat cables, the
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