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. ISBN 978-0-626-21612-2 SANS 60794-2-50:2008 Edition 1 IEC 60794-2-50:2008 Edition 1SOUTH AFRICAN NATIONAL STANDARD Optical fibre cables Part 2-50: Indoor
4、 cables Family specification for simplex and duplex cables for use in terminated cable assemblies This national standard is the identical implementation of IEC 60794-2-50:2008 and is adopted with the permission of the International Electrotechnical Commission. WARNING Can only be used in conjunction
5、 with SANS 60794-1-1, SANS 60794-1-2 and SANS 60794-2. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa This standard may only be used and printed by
6、approved subscription and freemailing clients of the SABS.SANS 60794-2-50:2008 Edition 1 IEC 60794-2-50:2008 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA SC 74A, Communication technology Fibre optics, in acco
7、rdance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in July 2008. This standard may only be used and printed by approved subscription and freemailing clients of the SABS. IEC 60794-2-50 Edition 1.0 2008-04 INTERNATIO
8、NAL STANDARD Optical fibre cables Part 2-50: Indoor cables Family specification for simplex and duplex cables for use in terminated cable assemblies INTERNATIONAL ELECTROTECHNICAL COMMISSION V ICS 33.180-10 PRICE CODE ISBN 2-8318-9738-6SANS 60794-2-50:2008This standard may only be used and printed b
9、y approved subscription and freemailing clients of the SABS. 2 60794-2-50 IEC:2008(E) CONTENTS FOREWORD.4 1 Scope.6 2 Normative references .6 3 Terms and definitions .7 4 Construction.7 4.1 General .7 4.2 Optical fibres and primary coating .7 4.3 Buffer 7 4.4 Tube8 4.5 Strength and anti-buckling mem
10、bers .8 4.6 Sheath 8 4.7 Sheath marking .8 4.8 Examples of cable constructions .8 5 Tests8 5.1 Dimensions .9 5.2 Mechanical requirements.9 5.2.1 Tensile performance9 5.2.2 Crush 9 5.2.3 Impact .10 5.2.4 Repeated bending .10 5.2.5 Bend10 5.2.6 Torsion11 5.2.7 Bend at low temperature11 5.2.8 Kink.11 5
11、.2.9 Sheath pull-off force 11 5.2.10 Buffered fibre movement in compression .12 5.3 Environmental requirements12 5.3.1 Temperature cycling 12 5.3.2 Sheath shrinkage.12 5.4 Transmission requirements .13 5.5 Fire performance.13 Annex A (informative) Examples of some types of cable construction 14 Anne
12、x B (normative) METHOD E21 Sheath pull-off force for optical fibre cable for use in patch cords 17 Annex C (normative) METHOD F11 Sheath shrinkage for optical fibre cable for use in patchcords 22 Annex D (normative) METHOD E22 Buffered fibre movement under compression in optical fibre cables for use
13、 in patchcords 24 Annex E (normative) METHOD F12 Temperature cycling for optical fibre cable for use in patchcords .26 Annex F (normative) Guidance on the selection of tests applicable to optical fibre cables for use in patchcords .28 Bibliography31 Figure A.1 Simplex loose non-buffered fibre cable
14、.14 Figure A.2 Simplex ruggedized fibre cable .14 SANS 60794-2-50:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60794-2-50 IEC:2008(E) 3 Figure A.3 Duplex loose non-buffered fibre cable.14 Figure A.4 Duplex ruggedized fibre cable.15 Figur
15、e A.5 Duplex ruggedized fibre zip cord.15 Figure A.6 Duplex ruggedized flat cable.15 Figure A.7 Duplex ruggedized round cable.16 Figure B.1 Schematic of test arrangement .19 Figure B.2 Example of pulling jig20 Figure B.3 Cable sample preparation .21 Figure D.1 Test set up for fibre movement under co
16、mpression.25 Table 1 Dimensions of buffered fibres8 Table 2 Temperature cycling severities12 Table F.1 Cable test method summary.28 Table F.2 Cable testing agreement 30 SANS 60794-2-50:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 4 6079
17、4-2-50 IEC:2008(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRE CABLES Part 2-50: Indoor cables Family specification for simplex and duplex cables for use in terminated cable assemblies FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for stand
18、ardization 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 Int
19、ernational 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 participa
20、te 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 betwee
21、n 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
22、 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
23、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 n
24、ational or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edit
25、ion 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 dir
26、ect 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 indispens
27、able 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 responsible for identifying any or all such patent rights. International Standard IEC 60794-2-50
28、 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This standard cancels and replaces IEC/PAS 60794-2-50 published in 2004. This first edition constitutes a technical revision. This standard is to be used in conjunction with IEC 60794-1-1, IEC 607
29、94-1-2 and IEC 60794-2. SANS 60794-2-50:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60794-2-50 IEC:2008(E) 5 The text of this standard is based on the following documents: FDIS Report on voting 86A/1204/FDIS 86A/1223/RVD Full informatio
30、n on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of IEC 60794 series, under the general title Optical fibre cables, can be foun
31、d on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed
32、, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication will be issued at a later date. SANS 60794-2-50:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 6 60794-2-50 IEC:2008(E) OPTICAL FIBRE CABLES P
33、art 2-50: Indoor cables Family specification for simplex and duplex cables for use in terminated cable assemblies 1 Scope This part of IEC 60794 is a family specification that covers requirements for simplex and duplex optical fibre cables for use in terminated cable assemblies or for termination wi
34、th optical fibre passive components. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments
35、) applies. They complete the normative references already listed in the generic specification (IEC 60794-1-1and IEC 60794-1-2) or in the sectional specification (IEC 60794-2 series). IEC 60068-2-14, Environmental testing Part 2: Tests. Test N: Change of temperature IEC 60189-1, Low-frequency cables
36、and wires with PVC insulation and PVC sheath Part 1: General test and measuring methods IEC 60793-1-1, Optical fibres Part 1-1: Measurement methods and test procedures General and guidance IEC 60793-1-20, Optical fibres Part 1-20: Measurement methods and test procedures Fibre geometry IEC 60793-1-21
37、, Optical fibres Part 1-21: Measurement methods and test procedures Coating geometry IEC 60793-1-40, Optical fibres Part 1-40: Measurement methods and test procedures Attenuation IEC 60793-1-46, Optical fibres Part 1-46: Measurement methods and test procedures Monitoring of changes in optical transm
38、ittance 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 class B single-mode fibres IEC 60794-1-1, Optical fibre cables Part 1-1: Gene
39、ric specification General IEC 60794-1-2, Optical fibre cables Part 1-2: Generic specification Basic optical cable test procedures SANS 60794-2-50:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60794-2-50 IEC:2008(E) 7 IEC 60794-2, Optical
40、fibre cables Part 2: Indoor cables Sectional specification IEC 60811-1-3, Common test methods for insulating and sheathing materials of electric and optical cables Part 1-3: General application Methods for determining the density Water absorption tests Shrinkage test IEC 60811-1-4, Common test metho
41、ds for insulating and sheathing materials of electric cables Part 1: Methods for general application Section Four: Tests at low temperature ISO/IEC 11801, Information technology Generic cabling for customer premises 3 Terms and definitions For the purposes of this document, the following terms and d
42、efinitions apply. 3.1 terminated cable assembly short length of cable provisioned with a connector at both ends NOTE Examples from ISO/IEC 11801 are: Patchcords are used to establish connections on a patch panel. Typical length of the patchcord 1m to 10 m. Work area cords are used to connect outlet
43、to the terminal equipment. Typical length of the work area cords according to this specification is between 1m and 35 m. Equipment cords should fulfill the requirements of patchcords or work area cords depending on their application. 4 Construction 4.1 General In addition to the constructional requi
44、rements in IEC 60794-2, the following considerations apply to simplex and duplex indoor cables for use in terminated cable assemblies. It is not the intention of this standard to specify the finished terminated cable assembly complete with terminations. The cable shall be designed and manufactured f
45、or an expected operating lifetime of 15 years. The materials in the cable shall not present a health hazard within its intended use. There shall be no fibre splice in a delivery length. It shall be possible to identify each individual fibre throughout the length of the cable. 4.2 Optical fibres and
46、primary coating Multimode or single-mode optical fibres meeting the requirements of IEC 60793-2-10, type A1a and A1b, and IEC 60793-2-50, type B, shall be used. 4.3 Buffer If a tight or semi-tight (loosely applied) buffer is required, it shall consist of one or more layers of inert material. Semi-ti
47、ght tubes may be filled. Unless otherwise specified, the buffer shall be removable in one operation over a length of 15 mm. Buffer dimensions are shown in Table 1. SANS 60794-2-50:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 8 60794-2-5
48、0 IEC:2008(E) Table 1 Dimensions of buffered fibres Nominal diameter (mm) 0,3 1,3 Tolerances (mm) 0,05 4.4 Tube One or two primary coated or buffered fibres are packaged (loosely or not) in a tube construction which may be filled. The tube may be reinforced with a composite wall. If required the sui
49、tability of the tube shall be determined by an evaluation of its kink resistance in accordance with IEC 60794-1-2, Method G7. 4.5 Strength and anti-buckling members The cable shall be designed with sufficient strength members to meet the requirements of this standard. The strength and/or anti-buckling member may be either metallic or non-metallic and may be located in the cable core and/or under the sheath a
