1、 IEC 60794-2-20 Edition 3.0 2013-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Optical fibre cables Part 2-20: Indoor cables Family specification for multi-fibre optical cables Cbles fibres optiques Partie 2-20: Cbles intrieurs Spcification de famille pour les cbles optiques multifibres IEC60794-2-
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16、NTERNATIONAL STANDARD NORME INTERNATIONALE Optical fibre cables Part 2-20: Indoor cables Family specification for multi-fibre optical cables Cbles fibres optiques Partie 2-20: Cbles intrieurs Spcification de famille pour les cbles optiques multifibres INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMIS
17、SION ELECTROTECHNIQUE INTERNATIONALE S ICS 33.180.01 PRICE CODE CODE PRIX ISBN 978-2-8322-1166-3 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorize
18、d distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. colourinside 2 60794-2-20 IEC:2013 CONTENTS FOREWORD . 4 1 Scope . 6 2 Normative references . 6 3 Construction . 7 General . 7 3.1Optical fibres . 7 3.2Buffer 7 3.3Ruggedized fibre . 8 3.4
19、Slotted core . 8 3.5Tube 8 3.6Stranded tube 8 3.7Ribbon structure 8 3.8Strength and anti-buckling members 8 3.9Ripcord . 8 3.10Sheath 8 3.11Sheath marking . 9 3.12Identification 9 3.13Examples of cable constructions . 9 3.144 Tests 9 General . 9 4.1Dimensions . 9 4.2Mechanical requirements . 9 4.3Ca
20、ble tensile performance . 9 4.3.1Cable crush . 10 4.3.2Cable impact . 10 4.3.3Cable bending . 10 4.3.4Cable repeated bending. 10 4.3.5Cable bending under tension . 10 4.3.6Cable bending at low temperature . 11 4.3.7Cable flexing . 11 4.3.8Cable torsion . 11 4.3.9Cable kink . 11 4.3.10Environmental r
21、equirements Temperature cycling. 11 4.4Transmission requirements 12 4.5Fire performance . 12 4.6Annex A (informative) Examples of cable constructions . 13 Annex B (informative) Family specification for multi-fibre optical cables Blank detail specification and minimum requirements . 17 Bibliography 2
22、2 Figure A.1 Example of cross-section of a 12 fibre cable . 13 Figure A.2 Example of cross-section of a 36 fibre cable . 13 Figure A.3 Example of cross-section of a 6 fibre break-out cable . 14 Figure A.4 Example of cross-section of a 24 fibre break-out cable . 14 Figure A.5 Example of cross-section
23、 of a slotted core type indoor cable with 4 fibre ribbons . 15 60794-2-20 IEC:2013 3 Figure A.6 Example of cross-section of an SZ (reverse oscillating lay) slotted core type indoor cable with 2 fibre ribbons 15 Figure A.7 Example of cross-section of an SZ (reverse oscillating lay) slotted core type
24、indoor cable with 4 fibre bundles . 16 Figure A.8 Example of multi-fibre unitube cable . 16 Figure A.9 Example of multi-fibre cable 16 Table 1 Dimensions of buffered fibres 8 Table 2 Sample temperature cycling values . 12 Table B.1 Cable description (1 of 2) . 17 Table B.2 Cable element 18 Table B.3
25、 Cable construction . 19 Table B.4 Installation and operating conditions 20 Table B.5 Tests applicable . 20 4 60794-2-20 IEC:2013 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRE CABLES Part 2-20: Indoor cables Family specification for multi-fibre optical cables FOREWORD 1) The Internationa
26、l Electrotechnical Commission (IEC) is a worldwide 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 f
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34、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 costs (including legal fees) and expenses arising out of the publication, use of, or reliance u
35、pon, 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 application of this publication. 9) Attention is drawn to the possibility that some of the element
36、s 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 60794-2-20 has been prepared by sub-committee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This third edi
37、tion cancels and replaces the second edition published in 2008 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: removal of Annex C; reference to the most recent fibre standards; reference to the new series I
38、EC 60794-1-2X. This standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2 and IEC 60794-2. 60794-2-20 IEC:2013 5 The text of this standard is based on the following documents: FDIS Report on voting 86A/1513/FDIS 86A/1549/RVD Full information on the voting for the approval of this s
39、tandard 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, published under the general title Optical fibre cables, can be found on the IEC website. The commit
40、tee has decided that the contents of this publication will remain unchanged until the stability 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 editio
41、n, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 6 60794-2-20 IEC:2013 OPTICAL F
42、IBRE CABLES Part 2-20: Indoor cables Family specification for multi-fibre optical cables 1 Scope This part of IEC 60794 is a family specification covering multi-fibre optical cables for indoor use. The requirements of the sectional specification IEC 60794-2 are applicable to cables covered by this s
43、tandard. Annex B contains a Blank Detail Specification and general guidance in case the cables are intended to be used in installation governed by the MICE table of ISO/IEC 24702 (Industrial premises) 111. 2 Normative references The following documents, in whole or in part, are normatively reference
44、d in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE These reference complete the normative references already listed in the g
45、eneric specification (IEC 60794-1-1 and IEC 60794-1-2). IEC 60189-1, Low-frequency cables and wires with PVC insulation and PVC sheath Part 1: General test and measuring methods IEC 60304, Standard colours for insulation for low-frequency cables and wires IEC 60793-1-20, Optical fibres Part 1-20: Me
46、asurement methods and test procedures Fibre geometry IEC 60793-1-21, Optical fibres Part 1-21: Measurement methods and test procedures Coating geometry IEC 60793-2-10, Optical fibres Part 2-10: Product specifications Sectional specification for category A1 multimode fibres IEC 60793-2-50, Optical fi
47、bres Part 2-50: Product specifications Sectional specification for class B single-mode 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 60794-1-20, Optical fi
48、bre cables Part 1-20: Generic specification Basic optical cable test procedures General and definitions2_ 1Figures in square brackets refer to the Bibliography. 2 To be published. 60794-2-20 IEC:2013 7 IEC 60794-1-22, Optical fibre cables Part 1-22: Generic specification Basic optical cable test pro
49、cedures Environmental test methods IEC 60794-1-23, Optical fibre cables Part 1-23: Generic specification Basic optical cable test procedures Cable element test methods IEC 60794-2:2002, Optical fibre cables Part 2: Indoor cables Sectional specification IEC 60794-3:2001, Optical fibre cables Part 3: Sectional specification
