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 978-0-626-22807-1 SANS 60794-2-40:2009Edition 2IEC 60794-2-40:2008Edition 2SOUTH AFRICAN NATIONAL STANDARD Optical fibre cables Part 2-40: Indoor op
4、tical fibre cables Family specification for A4 fibre cables This national standard is the identical implementation of IEC 60794-2-40:2008 and is adopted with the permission of the International Electrotechnical Commission. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag
5、 X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 60794-2-40:2009 Edition 2 IEC 60794-2-40:2008 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS TC 79, Fibre optics, in accordanc
6、e with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in November 2009. This SANS document supersedes SANS 60794-2-40:2006 (edition 1 as modified by IEC corr. 1:2005). IEC 60794-2-40Edition 2.0 2008-03INTERNATIONAL STA
7、NDARD Optical fibre cables Part 2-40: Indoor optical fibre cables Family specification for A4 fibre cables INTERNATIONAL ELECTROTECHNICAL COMMISSION HICS 33.180.10 PRICE CODEISBN 2-8318-9666-5SANS 60794-2-40:2009This s tandard may only be used and printed by approved subscription and freemailing cli
8、ents of the SABS . 2 60794-2-40 IEC:2008(E) CONTENTS FOREWORD.3 1 Scope.5 2 Normative references .5 3 Construction.5 3.1 General .5 3.2 Optical fibres.6 3.3 Buffer 6 3.4 Tube6 3.5 Strength and anti-buckling members .6 3.6 Ripcord .6 3.7 Ribbon 6 3.8 Sheath 6 3.9 Marking .6 3.10 Identification6 3.11
9、Examples of construction 6 4 Dimensions 6 5 Tests 6 5.1 Dimensions .7 5.2 Mechanical requirements.7 5.3 Environmental requirements7 5.4 Transmission requirements .7 5.5 Fire performance.7 Bibliography9 Table 1 Mechanical tests .7 SANS 60794-2-40:2009This s tandard may only be used and printed by app
10、roved subscription and freemailing clients of the SABS .60794-2-40 IEC:2008(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRE CABLES Part 2-40: Indoor optical fibre cables Family specification for A4 fibre cables FOREWORD 1) The International Electrotechnical Commission (IEC) is a world
11、wide organization for standardization 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 ac
12、tivities, IEC publishes International 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 subje
13、ct dealt with may participate 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 dete
14、rmined by agreement between 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 Commi
15、ttees. 3) IEC Publications 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
16、 they are used or for any 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 Publicati
17、on and the corresponding national 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
18、 they have the latest edition 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 natu
19、re whatsoever, whether direct 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
20、 publications is indispensable 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. Internation
21、al Standard IEC 60794-2-40 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This second edition cancels and replaces the first edition published in 2003, of which it constitutes a technical revision. In addition to covering buffered A4 fibres, as
22、 did the first edition, this second edition now also covers cabled A4 fibres. This standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2 and IEC 60794-2. SANS 60794-2-40:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 4
23、 60794-2-40 IEC:2008(E) The text of this standard is based on the following documents: CDV Report on voting 86A/1124A/CDV 86A/1153/RVC Full information 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
24、 in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 60794 series, published under the general title Optical fibre cables, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result
25、 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, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. SANS 6079
26、4-2-40:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .60794-2-40 IEC:2008(E) 5 OPTICAL FIBRE CABLES Part 2-40: Indoor optical fibre cables Family specification for A4 fibre cables 1 Scope This part of IEC 60794 is a family specification
27、covering buffered A4 fibres and cabled A4 fibres for indoor use. See IEC 60794-2-41 and IEC 607942-42 for blank detail specifications. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applie
28、s. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE The normative references given in IEC 60794-1-1 and IEC 60794-1-2 are also of interest. IEC 60189-1, Low-frequency cables and wires with PVC insulation and PVC sheath Part 1: General tes
29、t and measuring methods. 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 fibres Part 2-40: Product specifications Sectional spec
30、ification 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, Indoor cables Sectional specification 3 Construction 3.1 General
31、 In addition to the constructional requirements in IEC 60794-2, the following considerations apply to A4 fibre cables. The cable shall be designed and manufactured so that the expected operating lifetime would be at least 15 years. In this context, the attenuation of the installed cable at the opera
32、tional wavelength(s) shall not exceed values agreed between the customer and supplier. 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 unless otherwise agreed by the customer and supplier. SANS 60794-2-40:2009T
33、his s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 6 60794-2-40 IEC:2008(E) It shall be possible to identify each individual fibre throughout the length of the cable. 3.2 Optical fibres Multimode category A4 optical fibres shall be used that mee
34、t the 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
35、shall be easily removable over a length of 0,2 m to 2,0 m. 3.4 Tube See product specification. 3.5 Strength and anti-buckling members See product specification. 3.6 Ripcord For future study. 3.7 Ribbon None. 3.8 Sheath See product specification. 3.9 Marking If required, the buffer and/or the sheath
36、shall be marked as agreed between the customer and the supplier. 3.10 Identification See product specification. 3.11 Examples of construction See product specification. 4 Dimensions See product specification. 5 Tests Compliance with specification requirements shall be verified by carrying out tests
37、selected from the following subclauses. It is not intended that all tests be performed; the frequency of testing shall be agreed between the customer and supplier. SANS 60794-2-40:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .60794-2-40
38、 IEC:2008(E) 7 Unless otherwise specified, all tests shall be carried out at ambient temperature. 5.1 Dimensions The fibre dimensions and tolerances shall be checked in accordance with test method IEC 60793-1-20 and IEC 60793-1-21. The diameter of the buffer and of the cable, as well as the thicknes
39、s of the sheath, shall be measured in accordance with the methods of IEC 60189-1. 5.2 Mechanical requirements Some of the following tests, which are detailed in IEC 60794-1-2, can be performed on a short sample length of cable that is still an integral part of a longer length. Thus it becomes possib
40、le to detect permanent changes in attenuation. The maximum value of this attenuation change shall be agreed between the customer and supplier. Table 1 shows mechanical tests performed. The test methods, test parameters and requirements are specified in the product specification. Table 1 Mechanical t
41、ests Attribute Reference Tensile performance IEC 60794-1-2-E1A IEC 60794-1-2-E1B Crush IEC 60794-1-2-E3 Impact IE 60794-1-2-E4 Bend IEC 60794-1-2-E11A Repeated bending IEC 60794-1-2-E6 Bend at low temperature IEC 60794-1-2-E11A Flexing IEC 60794-1-2-E8 Torsion IE 60794-2-E7 Kink IEC 60794-1-2-E10 5.
42、3 Environmental requirements Environmental exposure testing of unbuffered fibre is required only when the fibre is sold in unbuffered form. Otherwise, environmental testing is performed on the completed product after the fibres are buffered or cabled. The test methods, test conditions, and requireme
43、nts are specified in the product specification. 5.4 Transmission requirements The transmission requirements shall be in accordance with IEC 60793-2-40 and shall be agreed between the customer and supplier. 5.5 Fire performance IEC/TR 62222 provides guidance and recommendations for the requirements a
44、nd test methods for the fire performance of communication cables when installed in buildings. The recommendations relate to typical applications and installation practices, and an assessment of the fire hazards presented. Applicable legislation and regulation are also taken into account. SANS 60794-
45、2-40:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 8 60794-2-40 IEC:2008(E) IEC/TR 62222 references several IEC fire performance test methods and also other test methods that may be required by local or national legislation and regulat
46、ion. The tests to be applied, and the requirements, shall be agreed between the customer and supplier taking into account the fire hazard presented by the end use application in which the cable is intended to be used. SANS 60794-2-40:2009This s tandard may only be used and printed by approved subscr
47、iption and freemailing clients of the SABS .60794-2-40 IEC:2008(E) 9 Bibliography IEC/TR 62222: Fire performance of communication cables installed in buildings IEC 60794-2-41, Optical fibre cables Part 2-41: Indoor optical fibre cables Product specification for simplex and duplex buffered A4 fibres1
48、IEC 60794-2-42, Optical fibre cables Part 2-42: Indoor optical fibre cables Product specification for simplex and duplex cables with A4 fibres1 _ _ 1To be published. SANS 60794-2-40:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .This pag
49、e has been left blank intentionally SABS Standards Division The objective of the SABS Standards Division is to develop, promote and maintain South African National Standards. This objective is incorporated in the Standards Act, 2008 (Act No. 8 of 2008). Amendments and Revisions South African National Standards are updated by amendment or revision. Users of South African National Standards should ensure that they possess the latest amendments or editions. Th
