SANS 60794-2-2003 Optical fibre cables Part 2 Indoor cables - Sectional specification《光缆 第2部分 室内电缆 分规范》.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 33.180.10 ISBN 0-626-14630-5 SANS 60794-2:2003 Edition 2 IEC 60794-2:2002 Edition 3 SOUTH AFRICAN NATIONAL STANDARD Optical fibre cables Part 2: Indo

4、or cables - Sectional specification This national standard is the identical implementation of IEC 60794-2:2002 and is adopted with the permission of the International Electrotechnical Commission. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012

5、 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa 2003 SANS 60794-2:2003 Edition 2 IEC 60794-2:2002 Edition 3 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee STANSA SC 74A, Fibre opti

6、cs, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This edition cancels and replaces the first edition (SABS IEC 60794-2). NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD60794-2Troisime ditionThird edition2002-12Cbles fibres optiques Part

7、ie 2:Cbles intrieurs Spcification intermdiaireOptical fibre cables Part 2:Indoor cables Sectional specificationPour prix, voir catalogue en vigueurFor price, see current catalogue IEC 2002 Droits de reproduction rservs Copyright - all rights reservedAucune partie de cette publication ne peut tre rep

8、roduite niutilise sous quelque forme que ce soit et par aucun procd,lectronique ou mcanique, y compris la photocopie et lesmicrofilms, sans laccord crit de lditeur.No part of this publication may be reproduced or utilized in anyform or by any means, electronic or mechanical, includingphotocopying an

9、d microfilm, without permission in writing fromthe publisher.International Electrotechnical Commission, 3, rue de Varemb, PO Box 131, CH-1211 Geneva 20, SwitzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.chCODE PRIXPRICE CODE JCommission Electrotechniq

10、ue InternationaleInternational Electrotechnical Commission 60794-2 IEC:2002 3 CONTENTSFOREWORD 51 Scope 92 Normative references. 93 Construction 93.1 General . 93.2 Optical fibres and primary coating . 93.3 Buffer 93.4 Ruggedized fibre . 93.5 Slotted core. 113.6 Tube 113.7 Stranded losse tube 113.8

11、Ribbon structure 113.9 Strength and anti-buckling members . 113.10 Ripcord. 113.11 Sheath 113.12 Sheath marking 113.13 Identification. 113.14 Examples of cable constructions. 134 Tests . 154.1 Dimensions . 154.2 Mechanical requirements. 154.3 Environmental requirements 174.4 Transmission requirement

12、s . 174.5 Fire performance. 175 Packaging176 Quality assurance 17Table 1 Colour coding sequence for individual fibres or buffers13Table 2 Colour coding scheme for tubes in hybrid cables .13Table 3 Colour coding of cable outer sheaths.1360794-2 IEC:2002 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION_OPT

13、ICAL FIBRE CABLES Part 2: Indoor cables Sectional specificationFOREWORD1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprisingall national electrotechnical committees (IEC National Committees). The object of the IEC is to promoteinternational

14、 co-operation on all questions concerning standardization in the electrical and electronic fields. Tothis end and in addition to other activities, the IEC publishes International Standards. Their preparation isentrusted to technical committees; any IEC National Committee interested in the subject de

15、alt with mayparticipate in this preparatory work. International, governmental and non-governmental organizations liaisingwith the IEC also participate in this preparation. The IEC collaborates closely with the InternationalOrganization for Standardization (ISO) in accordance with conditions determin

16、ed by agreement between thetwo organizations.2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, aninternational consensus of opinion on the relevant subjects since each technical committee has representationfrom all interested National Committees.3)

17、 The documents produced have the form of recommendations for international use and are published in the formof standards, technical specifications, technical reports or guides and they are accepted by the NationalCommittees in that sense.4) In order to promote international unification, IEC National

18、 Committees undertake to apply IEC InternationalStandards transparently to the maximum extent possible in their national and regional standards. Anydivergence between the IEC Standard and the corresponding national or regional standard shall be clearlyindicated in the latter.5) The IEC provides no m

19、arking procedure to indicate its approval and cannot be rendered responsible for anyequipment declared to be in conformity with one of its standards.6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subjectof patent rights. The IEC shall not

20、 be held responsible for identifying any or all such patent rights.International Standard IEC 60794-2 has been prepared by subcommittee 86A: Fibres andcables, of IEC technical committee 86: Fibre optics.This standard shall be used in conjunction with IEC 60794-1-1 and IEC 60794-1-2.This third editio

21、n cancels and replaces the second edition, published in 1989, its amend-ment 1, published in 1998, and constitutes a technical revision.The text of this standard is based on the following documents:FDIS Report on voting86A/819/FDIS 86A/831/RVDFull information on the voting for the approval of this s

22、tandard can be found in the report onvoting indicated in the above table.This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.60794-2 IEC:2002 7 IEC 60794 consists of the following parts, under the general title Optical fibre cables: Part 1: Generic specification Part

23、1-1: General Part 1-2: Basic optical cable test procedures Part 2: Indoor cables Sectional specification Part 3: Outdoor cables Sectional specification Part 4: Aerial optical cables for high-voltage power lines Sectional specification1.The committee has decided that the contents of this publication

24、will remain unchanged untilApril 2006. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended._1Under consideration.60794-2 IEC:2002 9 OPTICAL FIBRE CABLES Part 2: Indoor cables Sectional specification1 ScopeThis part of IEC 60794 is a sectional speci

25、fication. It gives the requirements that apply tooptical fibre cables for indoor use with applications such as transmission, telephone and dataprocessing equipment and communication and transmission networks.2 Normative referencesThe following referenced documents are indispensable for the applicati

26、on of this document.For dated references, only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.They complete the normative references already listed in the generic specification (IEC60794-1-1, Clause 2, and IEC 60794-

27、1-2 (Clause 2).IEC 60304:1982, Standard colours for insulation for low-frequency cables and wiresIEC 60332-3-24:2000, Tests on electric cables under fire conditions Part 3-24: Test forvertical flame spread of vertically-mounted bunched wires or cables Category C3 Construction3.1 GeneralNone.3.2 Opti

28、cal fibres and primary coatingThe optical fibre and fibre primary coating shall conform to the requirements of IEC 60793-2.3.3 BufferThe buffer, if any, shall consist of a suitable material applied loosely or tightly over the coatedfibre. The interstices between the coated fibre and loose buffer can

29、 be filled with a suitableand easily deformable material. The buffer shall be easily removable.3.4 Ruggedized fibreFurther protection can be provided to tight secondary coated fibres by surrounding one or twowith non-metallic strength members within a sheath of suitable material.60794-2 IEC:2002 11

30、3.5 Slotted coreThe slotted core is obtained by extruding a suitable material with a defined number of slots,providing helical or SZ configuration along the core. One or more primary coated fibres oroptical elements such as ribbons or fibre bundles are located in each slot.3.6 TubeIf the fibres are

31、deployed in a tube, one or more individual primary coated fibres or ribbonsare packaged (loosely or not) in a tube construction which may be filled. The tube may bereinforced with a composite wall.3.7 Stranded loose tubeNone.3.8 Ribbon structureIf the fibres are deployed in the form of a ribbon, the

32、 ribbon structure shall conform to 6.5 and8.2.3 of IEC 60794-3. Fibres shall be formed into units of typically two, four, six, eight, or 12fibres each. The fibres within the units shall remain parallel and not cross.3.9 Strength and anti-buckling membersIn general the cable shall be designed with su

33、fficient strength members to meet installationand service conditions so that the fibres are not subjected to strain in excess of limits agreedbetween the customer and the manufacturer.The strength and/or anti-buckling members may be either metallic or non-metallic and may belocated in the cable core

34、 and/or under the sheath and/or in the sheath.3.10 RipcordNone.3.11 SheathThe cable core shall be uniformly covered with a protective sheath.3.12 Sheath markingIf required, the cable shall be marked as agreed between the customer and the manufacturer.3.13 IdentificationNOTE The fibre, tube and sheat

35、h colour codes that follow are examples of possible standard colour identificationsystems. The final decision on the acceptable system is taken by the user (agreement between the customer andthe manufacturer).The coated fibre or buffer shall be distinguishable by means of colour coding or positionin

36、g.Cable tubes shall be distinguishable by means of numbering or colour coding. Standardcolours shall be used, as near as possible (reasonable match) to IEC 60304. The colours forfibres are given in Table 1 and the colours for tubes are given in Table 2. The cable sheathshall be colour coded or alter

37、natively, a printing in the sheath indicate the fibre type, forexample, G50/125 for multimode fibre with 50 m core diameter. The colours for sheaths aregiven in Table 3.60794-2 IEC:2002 13 Table 1 Colour-coding sequence for individual fibres or buffersFibre number Colour1Blue2 Yellow3Rd4Whit5Gren6 V

38、iolet7 Orange8Grey9 Turquoise10 Black11 Brown12 PinkNOTE For fibre counts above 12, additional groups of12 fibres should be identified by combining the abovesequence with an added identification (for example, ringmarking, dashed mark or tracer).Table 2 Colour-coding scheme for tubes in hybrid cables

39、Fibre typeFibre diametermTube colourMultimode 50/12562,5/125GreenBlueSingle-mode dispersion unshiftedSingle-mode dispersion shiftedAll diametersAll diametersYellowRed or yellowTable 3 Colour coding of cable outer sheathsCables with fibre type Colour of sheathSingle-mode fibre YellowMultimode fibre w

40、ith 50 m core diameter OrangeMultimode fibre with 62,5 m core diameter GreyMultimode fibre with 100 m core diameter BlackDispersion-shifted fibre Red3.14 Examples of cable constructionsNone.60794-2 IEC:2002 15 4 TestsCompliance with specification requirements shall be verified by carrying out tests

41、as requiredby the relevant cable specification. It is not intended that all tests shall be carried out; thefrequency of testing shall be agreed between the customer and the manufacturer.NOTE Tests for cables for use as patch cords are under consideration.4.1 DimensionsThe fibre dimensions and tolera

42、nces shall be checked in accordance with test Method C ofIEC 60793-1-20 or IEC 60793-1-21. The diameter of the buffer and of the cable, as well as thethickness of the sheath, shall be measured in accordance with the methods of IEC 60189-1.4.2 Mechanical requirements4.2.1 Cable tensile performanceThe

43、 cable shall be tested in accordance with IEC 60794-1-2, Method E1.4.2.2 Cable crushThe cable shall be tested in accordance with IEC 60794-1-2, Method E3.4.2.3 Cable impactThe cable shall be tested in accordance with IEC 60794-1-2, Method E4.4.2.4 Cable bendingThe cable shall be tested in accordance

44、 with IEC 60794-1-2, Method E11.4.2.5 Cable repeated bendingThe cable shall be tested in accordance with IEC 60794-1-2, Method E6.4.2.6 Cable bending under tensionThe cable shall be tested in accordance with IEC 60794-1-2, Method E18.4.2.7 Cable bending at low temperatureThe cable shall be tested in

45、 accordance with IEC 60794-1-2, Method E11.4.2.8 Cable flexingThe cable shall be tested in accordance with IEC 60794-1-2, Method E8.4.2.9 Cable torsionThe cable shall be tested in accordance with IEC 60794-1-2, Method E7.4.2.10 Cable kinkThe cable shall be tested in accordance with IEC 60794-1-2, Me

46、thod E10.60794-2 IEC:2002 17 4.3 Environmental requirements4.3.1 Temperature cyclingThe cable shall be tested in accordance with Method F1 of IEC 60794-1-2.4.4 Transmission requirementsThe transmission requirements shall be verified in accordance with IEC 60793-2 and shall beagreed between the custo

47、mer and the manufacturer. Maximum cable attenuation shall complywith IEC 60794-1-1.4.5 Fire performanceThe cable shall be tested in accordance with IEC 60332-1, IEC 60332-3-24, IEC 60754-1,IEC 60754-2, IEC 61034-1, IEC 61034-2 or to any other test method agreed between thecustomer and manufacturer.5

48、 PackagingCable shall be supplied on reels or in coils suitably protected for transport and the cable endsshall be sealed, if necessary, to prevent the ingress of moisture.6 Quality assuranceCompliance with specification requirements shall be verified by carrying out tests as indicatedin the relevan

49、t part of IEC 60794-2. It is not intended that all tests shall be carried out onevery length of cable; the frequency of testing shall be agreed between the customer andmanufacturer.It is the responsibility of the manufacturer to establish quality insurance by quality controlprocedures which ensure that the product meets the requirements of this standard. When thepurchaser wishes to specify acceptance tests to other quali