1、 IEC 60794-2-40 Edition 2.0 2008-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Optical fibre cables Part 2-40: Indoor optical fibre cables Family specification for A4 fibre cables Cbles fibres optiques Partie 2-40: Cbles intrieurs fibres optiques Spcification de famille pour les cbles fibres A4 IEC
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16、Q du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60794-2-40 Edition 2.0 2008-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Optical fibre cables Part 2-40: Indoor optical fibre cables Family specification for A4 fibre cables Cbles fibres optiqu
17、es Partie 2-40: Cbles intrieurs fibres optiques Spcification de famille pour les cbles fibres A4 INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE H ICS 33.180.10 PRICE CODE CODE PRIX ISBN 978-2-88912-769-6 Registered trademark of the International Electrotechnical
18、 Commission Marque dpose de la Commission Electrotechnique Internationale 2 60794-2-40 IEC:2008 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 Tube 6 3.5 Strength and anti-buckling members . 6 3.6 Ripcord . 6 3.
19、7 Ribbon 6 3.8 Sheath 6 3.9 Marking . 6 3.10 Identification 6 3.11 Examples of construction 6 4 Dimensions 6 5 Tests 6 5.1 Dimensions . 7 5.2 Mechanical requirements . 7 5.3 Environmental requirements 7 5.4 Transmission requirements . 7 5.5 Fire performance . 7 Bibliography 9 Table 1 Mechanical test
20、s . 7 60794-2-40 IEC:2008 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 worldwide organization for standardization comprising all
21、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 International Standards, Tech
22、nical 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 participate in this preparatory wor
23、k. 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 between the two organizations. 2
24、) 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 have the form of recommen
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26、nd 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 national or regional public
27、ation 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 edition of this publication. 7
28、) 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 direct or indirect, or for co
29、sts (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 indispensable for the correct appli
30、cation 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 60794-2-40 has been prepared by subc
31、ommittee 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 did the first edition, this second edition now also
32、 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. This bilingual version corresponds to the monolingual English version, published in 2008-03. 4 60794-2-40 IEC:2008 The text of this standard is based on the following documents: CD
33、V 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. The French version of this standard has not been voted upon. This publication has been drafted in accordance with the ISO/
34、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 date indicated on the IEC w
35、eb 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. 60794-2-40 IEC:2008 5 OPTICAL FIBRE CABLES Part 2-40: Indoor optical fibre cables Family specification for A
36、4 fibre cables 1 Scope This part of IEC 60794 is a family specification 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 applicati
37、on of this document. For dated references, only the edition cited applies. 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
38、 cables and wires with PVC insulation and PVC sheath Part 1: General test 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 607
39、93-2-40, Optical fibres 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 6
40、0794-2, Indoor cables Sectional specification 3 Construction 3.1 General 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 yea
41、rs. In this context, the attenuation of the installed cable at the operational 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 unl
42、ess otherwise agreed by the customer and supplier. 6 60794-2-40 IEC:2008 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 meet the requirements of IEC 60793- 2-40. 3.3 Buffer The buff
43、er, 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 shall be easily removable over a length of 0,2 m to 2,0 m
44、 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 shall be marked as agreed between the customer and the su
45、pplier. 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 selected from the following subclauses. It is not intende
46、d that all tests be performed; the frequency of testing shall be agreed between the customer and supplier. 60794-2-40 IEC:2008 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 t
47、est method IEC 60793-1-20 and 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. 5.2 Mechanical requirements Some of the following tests, which are detailed in IEC 60794-1-2, can be per
48、formed 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. The maximum value of this attenuation change shall be agreed between the customer and supplier. Table 1 shows mechanical tests performed. T
49、he test methods, test parameters and requirements are specified in the product specification. Table 1 Mechanical tests Attribute Reference Tensile performance IEC 60794-1-2-E1A IEC 60794-1-2-E1B Crush IEC 60794-1-2-E3 Impact IEC 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 IEC
