Bsi bs en 60794 2 20 2014

BS EN 60794-2-20:2014 BSI Standards Publication Optical fibre cables Part 2-20: Indoor cables — Family specification for multi-fibre optical cables BRITISH STANDARD BS EN 60794-2-20:2014 National foreword This British Standard is the UK implementation of EN 60794-2-20:2014 It is identical to IEC 60794-2-20:2013 It supersedes BS EN 60794-2-20:2010 which is withdrawn The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/1, Optical fibres and cables A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2014 Published by BSI Standards Limited 2014 ISBN 978 580 78022 ICS 33.180.01 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2014 Amendments/corrigenda issued since publication Date Text affected BS EN 60794-2-20:2014 EUROPEAN STANDARD EN 60794-2-20 NORME EUROPÉENNE EUROPÄISCHE NORM May 2014 ICS 33.180.01 Supersedes EN 60794-2-20:2010 English Version Optical fibre cables - Part 2-20: Indoor cables - Family specification for multi-fibre optical cables (IEC 60794-2-20:2013) Optical fibre cables - Part 2-20: Indoor cables - Family specification for multi-fibre optical cables (CEI 60794-2-20:2013) Lichtwellenleiterkabel - Teil 2-20: LWL-Innenkabel Familienspezifikation für Mehrfaser-Lichtwellenleiterkabel (IEC 60794-2-20:2013) This European Standard was approved by CENELEC on 2013-12-10 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels © 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members Ref No EN 60794-2-20:2014 E BS EN 60794-2-20:2014 EN 60794-2-20:2014 -2- Foreword The text of document 86A/1513/FDIS, future edition of IEC 60794-2-20, prepared by SC 86A, "Fibres and cables", of IEC TC 86, "Fibre optics" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60794-2-20:2014 The following dates are fixed: • • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement latest date by which the national standards conflicting with the document have to be withdrawn (dop) 2014-11-16 (dow) 2016-12-10 This document supersedes EN 60794-2-20:2010 EN 60794-2-20:2014 includes the following significant technical changes with respect to EN 60794-220:2010: • removal of Annex C; • reference to the most recent fibre standards; • reference to the new series EN 60794-1-2X This standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2 and IEC 60794-2 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights Endorsement notice The text of the International Standard IEC 60794-2-20:2013 was approved by CENELEC as a European Standard without any modification In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60654 (Series) NOTE Harmonized as EN 60654 (Series) (not modified) IEC 60721-1 NOTE Harmonized as EN 60721-1 (not modified) IEC 60721-3-3 NOTE Harmonized as EN 60721-3-3 (not modified) IEC 61000-6-2 NOTE Harmonized as EN 61000-6-2 (not modified) IEC 61326 (Series) NOTE Harmonized as EN 61326 (Series) (not modified) IEC 61918 NOTE Harmonized as EN 61918 (modified) BS EN 60794-2-20:2014 EN 60794-2-20:2014 -3- Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced 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 When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies To be used together with the Annexes ZA of EN 60794-1-1 and EN 60794-1-2 Publication Year Title EN/HD Year 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 lowfrequency cables and wires HD 402 S2 IEC 60793-1-20 Optical fibres Part 1-20: Measurement methods and test procedures - Fibre geometry EN 60793-1-20 IEC 60793-1-21 Optical fibres Part 1-21: Measurement methods and test procedures - Coating geometry EN 60793-1-21 IEC 60793-2-10 Optical fibres EN 60793-2-10 Part 2-10: Product specifications - Sectional specification for category A1 multimode fibres IEC 60793-2-50 + corr January Optical fibres Part 2-50: Product specifications - Sectional specification for class B single-mode fibres EN 60793-2-50 IEC 60794-1-1 + corr January Optical fibre cables Part 1-1: Generic specification - General EN 60794-1-1 IEC 60794-1-2 Optical fibre cables - Part 1-2: Generic EN 60794-1-2 specification - Cross reference table for optical cable test procedures IEC 60794-1-20 Optical fibre cables FprEN 60794-1-20 Part 1-20: Generic specification - Basic optical cable test procedures - General and Definitions IEC 60794-1-22 Optical fibre cables EN 60794-1-22 Part 1-22: Generic specification - Basic optical cable test procedures - Environmental test methods IEC 60794-1-23 Optical fibre cables EN 60794-1-23 Part 1-23: Generic specification - Basic optical cable test procedures - Cable element test methods IEC 60794-2 2002 Optical fibre cables EN 60794-2 Part 2: Indoor cables - Sectional specification 2003 IEC 60794-3 2001 Optical fibre cables Part 3: Sectional specification - Outdoor cables 2002 EN 60794-3 BS EN 60794-2-20:2014 EN 60794-2-20:2014 -4- IEC 60811-202 Electric and optical fibre cables - Test methods for non-metallic materials Part 202: General tests - Measurement of thickness of non-metallic sheath EN 60811-202 IEC 60811-203 Electric and optical fibre cables - Test methods for non-metallic materials Part 203: General tests - Measurement of overall dimensions EN 60811-203 IEC 60811-504 Electric and optical fibre cables - Test EN 60811-504 methods for non-metallic materials Part 504: Mechanical tests - Bending tests at low temperature for insulation and sheaths IEC/TR 62222 Fire performance of communication cables installed in buildings - - –2– BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 CONTENTS Scope Normative references Construction 3.1 General 3.2 Optical fibres 3.3 Buffer 3.4 Ruggedized fibre 3.5 Slotted core 3.6 Tube 3.7 Stranded tube 3.8 Ribbon structure 3.9 Strength and anti-buckling members 3.10 Ripcord 3.11 Sheath 3.12 Sheath marking 3.13 Identification 3.14 Examples of cable constructions Tests 4.1 4.2 4.3 General Dimensions Mechanical requirements 4.3.1 Cable tensile performance 4.3.2 Cable crush 10 4.3.3 Cable impact 10 4.3.4 Cable bending 10 4.3.5 Cable repeated bending 10 4.3.6 Cable bending under tension 10 4.3.7 Cable bending at low temperature 11 4.3.8 Cable flexing 11 4.3.9 Cable torsion 11 4.3.10 Cable kink 11 4.4 Environmental requirements – Temperature cycling 11 4.5 Transmission requirements 12 4.6 Fire performance 12 Annex 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 22 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 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 of a slotted core type indoor cable with fibre ribbons 15 BS EN 60794-2-20:2014 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 fibre ribbons 15 Figure A.7 – Example of cross-section of an SZ (reverse oscillating lay) slotted core type indoor cable with fibre bundles 16 Figure A.8 – Example of multi-fibre unitube cable 16 Figure A.9 – Example of multi-fibre cable 16 Table – Dimensions of buffered fibres Table – Sample temperature cycling values 12 Table B.1 – Cable description (1 of 2) 17 Table B.2 – Cable element 18 Table B.3 – Cable construction 19 Table B.4 – Installation and operating conditions 20 Table B.5 – Tests applicable 20 BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 –6– OPTICAL FIBRE CABLES – Part 2-20: Indoor cables – Family specification for multi-fibre optical cables 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 standard 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) [11] Normative references The following documents, in whole or in part, are normatively referenced 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 (IEC 60794-1-1 and IEC 60794-1-2) already listed in the generic specification 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: Measurement methods and test procedures – Fibre geometry IEC 60793-1-21, Optical fibres – Part 1-21: Measurement methods and test procedures – Coating geometry IEC 60793-2-10, 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: 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 fibre cables – Part 1-20: Generic specification – Basic optical cable test procedures – General and definitions _ Figures in square brackets refer to the Bibliography To be published BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 –7– IEC 60794-1-22, Optical fibre cables – Part 1-22: Generic specification – Basic optical cable test procedures – 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 – Outdoor cables IEC 60811-202, Electric and optical fibre cables – Test methods for non-metallic materials – Part 202: General tests – Measurement of thickness of non-metallic sheath IEC 60811-203, Electric and optical fibre cables – Test methods for non-metallic materials – Part 203: General tests – Measurement of overall dimensions IEC 60811-504, Electric and optical fibre cables – Test methods for non-metallic materials – Part 504: Mechanical tests – Bending tests at low temperature for insulation and sheaths IEC/TR 62222, Fire performance of communication cables installed in buildings 3.1 Construction General In addition to the constructional requirements in IEC 60794-2, the following considerations apply to multi-fibre indoor cables The cable shall be designed and manufactured for an expected operating lifetime of at least 15 years In this context, the attenuation at the operational wavelength(s) of the optical fibres contained in the installed cable shall not exceed values agreed between customer and supplier The materials in the cable shall not present a health or environmental hazard within its intended use There shall be no fibre splice in a delivery length unless otherwise agreed by customer and supplier It shall be possible to identify each individual fibre throughout the length of the cable 3.2 Optical fibres Class A1 multimode fibres which meet the requirements of IEC 60793-2-10 or class B subcategories B1.1, B1.3, B6_a, and B6_b single-mode optical fibres which meet the requirements of IEC 60793-2-50 shall be used The linear coefficient of optical fibre attenuation and attenuation point discontinuity may be affected by the cable manufacturing process Maximum values for these optical characteristics shall be agreed between customer and supplier 3.3 Buffer If a tight or semi-tight (loosely applied) buffer is required, it shall consist of one or more layers of inert material The buffer shall be easily removable For tight buffers, the buffer and fibre primary coating shall be 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 0,3 m to 2,0 m Buffer dimensions are shown in Table BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 – 11 – Bending radius: 20 times cable diameter Load: 400 N or weight of km of cable, whichever is greater Requirements: no change in attenuation after the test, and there shall be no visible damage to the cable elements 4.3.7 Cable bending at low temperature Method: IEC 60794-1-21-E11A (see IEC 60811-504) Bending radius: 10 times cable diameter Test temperature: °C, –10 °C or –15 °C depending on application and customer requirements Number of turns per helix: according to IEC 60811-504 Number of cycles: Requirements: in addition to the requirements of IEC 60811-504, no fibre shall break during the test 4.3.8 Cable flexing Method: IEC 60794-1-21-E8 Number of cycles: 100 Pulley diameter: 20 times cable diameter Mass of weights: kg (minimum) Requirements: no fibre breakage NOTE For certain applications specifying MICE classification of ISO/IEC 24702 and related standards, different pulley diameter values may be agreed between customer and supplier 4.3.9 Cable torsion Method: IEC 60794-1-21-E7 Number of cycles: 10 Distance between fixed and rotation clamp: 125 times cable diameter but not more than 2,0 m Tension load: 20 N Requirements: no fibre breakage NOTE For certain applications specifying MICE classification of ISO/IEC 24702 and related standards, different values for the number of cycles may be agreed between customer and supplier 4.3.10 Cable kink Method: IEC 60794-1-21-E10 Minimum loop diameter: 20 times cable diameter Requirement: no kink shall occur 4.4 Environmental requirements – Temperature cycling Method: IEC 60794-1-22-F1 BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 – 12 – Table – Sample temperature cycling values Low temperature TA High temperature TB a) * °C +50 °C b) –5 °C +50 °C c) –20 °C +60 °C d) –40 °C +60 °C * Condition a), b) c) or d) shall be selected depending on application and customer requirements, for example condition c) is appropriate for applications to ISO/IEC 11801 [10] Period: t = sufficient time such that the cable has reached thermal stability throughout its entire length at the specified temperature (e.g h ≤ t ≤ 24 h) Number of cycles: Length of sample: sufficient to achieve the desired accuracy of measurement of attenuation Requirements: the wavelength and maximum increase in attenuation both at T A and T B and after returning to thermal stability at ambient temperature shall be agreed between the customer and supplier 4.5 Transmission requirements The transmission requirements shall be verified in accordance with IEC 60793-2-10 or IEC 60793-2-50 and shall be agreed between customer and supplier Maximum cable attenuation shall comply with values stated in the relevant detail specification 4.6 Fire performance IEC/TR 62222 provides recommendations for the requirements and test methods to be specified for the fire performance of communication cables when installed in buildings The recommendations relate to typical applications and installation practices and also take into account legislation and regulation applicable to the fire performance of cables that govern the tests to be performed Tests to be performed shall be agreed between the customer and the supplier BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 – 13 – Annex A (informative) Examples of cable constructions Figures A.1 to A.9 provide examples of cable constructions Coated fibre Thermoplastic buffer Strength member Dielectric central member Overcoat Sheath IEC 2648/13 Figure A.1 – Example of cross-section of a 12 fibre cable Buffered fibre Subunit sheath Strength member Overcoat Dielectric central member Strength member Dielectric central member Ripcord Sheath IEC 2649/13 Figure A.2 – Example of cross-section of a 36 fibre cable BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 – 14 – Coated fibre Thermoplastic buffer Strength member Subunit sheath Strength member Dielectric central member Overcoat Sheath IEC 2650/13 Figure A.3 – Example of cross-section of a fibre break-out cable Dielectric central member Single fibre subunit fibre unit Dielectric central member Strength member Sheath Ripcord IEC 2651/13 Figure A.4 – Example of cross-section of a 24 fibre break-out cable BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 – 15 – Sheath fibre ribbon Slotted core Strength member Ripcord IEC 2652/13 Figure A.5 – Example of cross-section of a slotted core type indoor cable with fibre ribbons Sheath fibre ribbon SZ slotted rod Strength member Ripcord IEC 2653/13 Figure A.6 – Example of cross-section of an SZ (reverse oscillating lay) slotted core type indoor cable with fibre ribbons BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 – 16 – Sheath fibre bundles SZ slotted rod Strength member Ripcord IEC 2654/13 Figure A.7 – Example of cross-section of an SZ (reverse oscillating lay) slotted core type indoor cable with fibre bundles Fibres (loose or bundled) Tube Strength member Sheath IEC 2655/13 Figure A.8 – Example of multi-fibre unitube cable Coated fibres Thermoplastic buffer Strength member Sheath IEC 2656/13 Figure A.9 – Example of multi-fibre cable BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 – 17 – Annex B (informative) Family specification for multi-fibre optical cables – Blank detail specification and minimum requirements B.1 Blank detail specification B.1.1 Cable description Table B.1 – Cable description (1 of 2) (1) Prepared by (3) Available from (2) (4) Document No: Issue: Date: Generic specification: IEC 60794-1-1 Sectional specification: IEC 60794-2 (5) Additional references: ISO/IEC 24702 if required (6) Cable description: (7) Cable construction: Optical fibres Range of fibre count Modularity Construction – single coloured fibre – tube – filled – tube – unfilled – slotted core – filled – slotted core – unfilled – tight or semi-tight buffer – ribbon in slotted core – ribbon in tube – strength elements – non metallic – strength elements – metallic Lay-up – stranding (helical or reverse oscillating/SZ) – single unit – hybrid configuration – other Insulated copper conductors – AWG – solid/stranded – insulation material Inner sheath material – minimum wall thickness Peripheral strength member – metallic – non-metallic Additional remarks BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 – 18 – Table B.1 (2 of 2) Outer sheath – material – minimum wall thickness Additional armouring – non-metallic armouring – metallic armouring Marking identification – customer requirement – identification of supplier (8) Application information: Application Maximum outer diameter (d) mm Rated maximum tensile load N Minimum bending radius for operation mm or nxd Minimum bending radius under load mm or nxd Temperature range: – transport and storage – installation ºC ºC – operation ºC Manufacturing cable length – typical m – nominal/tolerances: +1 B.1.2 % Cable element Table B.2 – Cable element Characteristics (9) Cable element Tight/semi-tight buffer Slotted core Tube Compound flow and evaporation Outer diameter Ribbon Filler Insulated copper conductor Central strength member IEC 60794-2 Clause/subclause (10) Family requirements (11) Test methods (12) Remarks (13) BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 B.1.3 – 19 – Cable construction Table B.3 – Cable construction Characteristics (9) IEC 60794-2 Clause/ subclause (10) Family requirements (11) Lay-up 6.2 According to DS Cable core 6.3 According to DS Strength member 6.4 According to DS – central – peripheral Outer cable sheath Test methods (12) a Visual inspection Visual inspection 6.6 Material 6.6.3 of IEC 60794-2:2002 Minimum sheath thickness According to DS IEC 60811-202 Outer diameter According to DS IEC 60811-203 Optional protection According to DS Sheath marking 6.7 Configuration, dimensions According toDS Visual inspection Abrasion resistance According to DS IEC 60794-1-21, Method E2B, Method Or IEC 60794-1-21, Method E2B, Method Sheath abrasion Cable length a Detail specification 8.10 According to DS IEC 60794-1-21, Method E2A Remarks (13) BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 – 20 – B.1.4 Installation and operating conditions Table B.4 – Installation and operating conditions Characteristics (9) IEC 60794-2 Clause/subclause (10) Family requirements (11) Test methods (12) Remarks (13) General requirements Bend of cable element IEC 60794-1-21, Method G1 Tube kinking IEC 60794-1-21, Method G7 Ribbons: – dimensions IEC 60794-1-23, Method G2, G3 or G4 – separability of individual fibres from ribbon IEC 60794-1-21, Method G5 or acc DS – ribbon stripping – torsion B.1.5 IEC 60794-1-21, Method G6 Mechanical and environmental tests Table B.5 – Tests applicable Characteristics (9) Tensile performance IEC 60794-2 Clause/subclause (10) Family requirements (11) Test methods (12) IEC 60794-1-2, Method E1A and E1B Installation capability selection from the following: – bending under tension IEC 60794-1-21, Method E18 – repeated bending IEC 60794-1-21, Method E6 – impact IEC 60794-1-21, Method E4 – kink IEC 60794-1-21, Method E10 – torsion IEC 60794-1-21, Method E7 Cable bend IEC 60794-1-21, Method E11 Crush IEC 60794-1-21, Method E3 Temperature cycling IEC 60794-1-22, Method F1 Ageing – coating adhesion stability – finished cable IEC 60794-1-22, Method E5 Remarks (13) BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 B.2 – 21 – Cables subject to the MICE environmental classification (ISO/IEC 24702 and related standards) Cables intended for installation in conformity with ISO/IEC 24702 and related standards may require the specification of additional tests to ensure their suitability in the applicable environments defined by the mechanical, ingress, climatic and chemical, and electromagnetic (MICE) classification Such tests are outside of the scope of IEC 60794 cable specifications, and MICE criteria are not part of the requirements for IEC 60794 specifications The MICE tests may be the same as, similar to, or substantially different from, the tests required by IEC 60794 specifications Cables manufactured per IEC 60794 specifications may or may not meet the MICE criteria For supplemental guidance see IEC/TR 62362 [9] – 22 – BS EN 60794-2-20:2014 60794-2-20 © IEC:2013 Bibliography [1] IEC 60654 (all parts), Industrial-process measurement and control equipment – Operating conditions [2] IEC 60721-1, Classification of environmental conditions – Part 1: Environmental parameters and their severities [3] IEC 60721-3-3, Classification of environmental conditions – Part 3-3: Classification of groups of environmental parameters and their severities – Stationary use at weatherprotected locations [4] IEC 60794-1-21, Optical fibre cables – Part 1-21: Generic specification – Basic optical cable test procedures – Mechanical tests methods [5] IEC/TR 61000-2-5, Electromagnetic compatibility (EMC) – Part 2-5: Environment – Description and classification of electromagnetic environments [6] IEC 61000-6-2, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards – Immunity for industrial environments [7] IEC 61326 (all parts), Electrical equipment for measurement, control and laboratory use – EMC requirements [8] IEC 61918, Industrial communication networks – Installation of communication networks in industrial premises [9] IEC/TR 62362, Selection of optical fibre cable specifications relative to mechanical, ingress, climatic or electromagnetic characteristics – Guidance [10] ISO/IEC 11801, Information technology – Generic cabling for customer premises [11] ISO/IEC 24702, Information technology – Generic cabling – Industrial premises _ _ Under consideration as a Committee Draft This page deliberately left blank This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Revisions We bring together business, industry, government, consumers, innovators and others to shape their combined experience and expertise into standards -based 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