BS-EN-50173-5-2007.pdf

BRITISH STANDARD BS EN 50173-5:2007 Information technology Generic cabling systems Part 5: Data centres The European Standard EN 50173-5:2007 has the status of a British Standard ICS 33.040.50 ? Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 50173-5:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2007 © BSI 2007 ISBN 978 0 580 56056 9 National foreword This British Standard is the UK implementation of EN 50173-5:2007. The UK participation in its preparation was entrusted to Technical Committee TCT/7, Telecommunications Installation requirements. A list of organizations represented on this committee can be obtained on request to its secretary. In addition to the requirements listed in subclause 1.2, conformance to BS EN 50173-5:2007 also requires the application of BS 6701. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 50173-5 NORME EUROPÉENNE EUROPÄISCHE NORM May 2007 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels © 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50173-5:2007 E ICS 33.040.50 English version Information technology - Generic cabling systems - Part 5: Data centres Technologies de l'information - Systèmes de câblage générique - Partie 5: Centres de données Informationstechnik - Anwendungsneutrale Kommunikationskabelanlagen - Teil 5: Rechenzentren This European Standard was approved by CENELEC on 2007-04-11. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50173-5:2007 2 Foreword This European Standard was prepared by the Technical Committee CENELEC TC 215, Electrotechnical aspects of telecommunication equipment. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50173-5 on 2007-04-11. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2008-05-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-05-01 The European Standards EN 50173:1995 and EN 50173-1:2002 have been developed to enable the application-independent cabling to support ICT applications in office premises. Their basic principles, however, are applicable to other types of applications and in other types of premises. TC 215 has decided to establish relevant European Standards which address the specific requirements of these premises. In order to point out the commonalities of these cabling design standards, these EN are published as individual parts of the series EN 50173, thus also acknowledging that standards users recognize the designation “EN 50173” as a synonym for generic cabling design. At the time of publication of this European Standard, series EN 50173 comprises the following standards: EN 50173-1 Information technology Generic cabling systems Part 1: General requirements EN 50173-2 Information technology Generic cabling systems Part 2: Office premises EN 50173-3 Information technology Generic cabling systems Part 3: Industrial premises EN 50173-4 Information technology Generic cabling systems Part 4: Homes EN 50173-5 Information technology Generic cabling systems Part 5: Data centres Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSI - 3 - EN 50173-5:2007 Contents Introduction 5 1 Scope and conformance .8 1.1 Scope 8 1.2 Conformance.8 2 Normative references 9 3 Definitions and abbreviations.9 3.1 Definitions9 3.2 Abbreviations.10 4 Structure of the generic cabling system in data centres 11 4.1 General11 4.2 Functional elements.11 4.3 General structure and hierarchy.11 4.4 Cabling subsystems.12 4.5 Accommodation of functional elements13 4.6 Interfaces.14 4.7 Dimensioning and configuring14 5 Channel performance in data centres 17 5.1 General17 5.2 Environmental performance.18 5.3 Transmission performance.19 6 Reference implementations in data centres.20 6.1 General20 6.2 Balanced cabling20 6.3 Optical fibre cabling .26 7 Cable requirements in data centres27 7.1 General27 7.2 Balanced cables 27 7.3 Optical fibre cables 28 8 Connecting hardware requirements in data centres .28 8.1 General requirements 28 8.2 Connecting hardware for balanced cabling 28 8.3 Connecting hardware for optical fibre cabling.29 9 Requirements for cords and jumpers in data centres.29 9.1 Jumpers.29 9.2 Balanced cords29 Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50173-5:2007 4 9.3 Optical fibre cords29 Annex A (normative) Link performance limits.30 Annex B (normative) Channel insertion loss models for high bit rate, multimode, optical fibre applications 31 Bibliography .32 Figures Figure 1 - Schematic relationship between the EN 50173 series and other relevant standards .6 Figure 2 - Structure of generic cabling.12 Figure 3 - Hierarchical structure of generic cabling12 Figure 4 - Example of accommodation of functional elements.14 Figure 5 - Test and equipment interfaces 15 Figure 6 - Connection of functional elements providing redundancy16 Figure 7 - The External Network Interface .16 Figure 8 - Example of a channel18 Figure 9 - Example of a system showing the location of cabling interfaces18 Figure 10 - Zone distribution cabling models .22 Figure 11 Main distribution cabling model.23 Figure 12 - Network access cabling model 25 Figure A.1 - Link options30 Tables Table 1 - Contextual relationship between EN 50173 series and other standards relevant for information technology cabling systems7 Table 2 - Zone distribution channel equations .21 Table 3 - Main distribution channel equations24 Table 4 - Network access cabling channel equations 26 Table 5 - Optical fibre channel parameters27 Table B.1 Maximum channel attenuation allocated to connecting hardware .31 Table B.2 - Maximum connecting hardware attenuation 32 Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSI - 5 - EN 50173-5:2007 Introduction The importance of the information technology cabling infrastructure is similar to that of other utilities such as heating, lighting and electricity supplies. As with other utilities, interruptions to service can have serious impact. Poor quality of service due to lack of planning, use of inappropriate components, incorrect installation, poor administration or inadequate support can threaten an organisation's effectiveness. Cabling within data centres comprises both application-specific and multipurpose networks that are mission- critical to the enterprise. Generic cabling designs in accordance with the EN 50173 series have supported the development of high data rate applications based upon a defined cabling model. This European standard recognizes the benefit of generic cabling to provision multiple services and to connect large quantities of equipment within the limited space of data centre premises, and is to be used in conjunction with EN 50173-1. This European Standard, EN 50173-5, provides: a) users with an application independent generic cabling system and an open market for cabling components; b) requirements for infrastructures that support critical applications within data centres; c) a flexible cabling scheme such that modifications are both easy and economical; d) a scaleable structure to support expansion with minimum operational disruption; e) building professionals (for example, architects) with guidance allowing the accommodation of cabling before specific requirements are known; i.e. in the initial planning either for construction or refurbishment; f) industry and standardisation bodies with a cabling system which supports current products and provides a basis for future product development and applications standardisation. This European Standard specifies multi-vendor cabling, and is related to: - the associated standard covering general requirements for generic cabling within premises (EN 50173-1); - standards for cabling components developed by Technical Committees of CENELEC and/or IEC; - standards for the quality assurance and installation of information technology cabling (series EN 50174) and testing of installed cabling (EN 50346); - applications developed by the technical committees of IEC (including the subcommittees of ISO/IEC JTC 1) and study groups of ITU-T. It is anticipated that the generic cabling system meeting the requirements of this European Standard will have a life expectancy in excess of ten years. Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 50173-5:2007 6 Figure 1 and Table 1 show the schematic and contextual relationships between the standards produced by TC 215 for information technology cabling, namely 1) this and other parts of the EN 50173 series; 2) application dependent cabling design (e.g. EN 50098 series); 3) installation (EN 50174 series); 4) testing of installed cabling (EN 50346); 5) equipotential bonding requirements (EN 50310). EN 50173-1: Information technology - Generic cabling - General requirements EN 50098-1: Customer premises cabling for information technology - ISDN basic access EN 50174-2: Information technology - Cabling installation - Installation planning and practices inside buildings EN 50174-3: Information technology - Cabling installation - Installation planning and practices outside buildings EN 50174-1: Information technology - Cabling installation - Specification and quality assurance EN 50310: Application of equipotential bonding and earthing in buildings with information technology equipment EN 50098-2: Customer premises cabling for information technology - 2048 kbit/s ISDN primary access and leased line network interface EN 50346: Information technology - Cabling installation - Testing of installed cabling EN 50173-2: Information technology - Generic cabling - Office premises EN 50173-3: Information technology - Generic cabling - Industrial premises EN 50173-4: Information technology - Generic cabling - Homes EN 50173-5: Information technology - Generic cabling - Data centres EN 50173-1: Information technology - Generic cabling - General requirements EN 50098-1: Customer premises cabling for information technology - ISDN basic access EN 50174-2: Information technology - Cabling installation - Installation planning and practices inside buildings EN 50174-3: Information technology - Cabling installation - Installation planning and practices outside buildings EN 50174-1: Information technology - Cabling installation - Specification and quality assurance EN 50310: Application of equipotential bonding and earthing in buildings with information technology equipment EN 50098-2: Customer premises cabling for information technology - 2048 kbit/s ISDN primary access and leased line network interface EN 50346: Information technology - Cabling installation - Testing of installed cabling EN 50173-2: Information technology - Generic cabling - Office premises EN 50173-3: Information technology - Generic cabling - Industrial premises EN 50173-4: Information technology - Generic cabling - Homes EN 50173-5: Information technology - Generic cabling - Data centres NOTE For the purposes of the standards in the EN 50173 and EN 50174 series the term “information technology” includes ICT, BCT and CCCB applications. Figure 1 - Schematic relationship between the EN 50173 series and other relevant standards Licensed Copy: London South Bank University, London South Bank University, Sat Sep 01 03:19:53 GMT+00:00 2007, Uncontrolled Copy, (c) BSI - 7 - EN 50173-5:2007 Table 1 - Contextual relationship between EN 50173 series and other standards relevant for information technology cabling systems Building design phase Generic cabling design phase Specification phase Installation phase Operation phase EN 50310 EN 50173 series except EN 50173-4 EN 50174-1 EN 50174-1 5.2: Common bonding network (CBN) within a building 6.3: AC distribution system and bonding of the protective conductor (TN-S) 4: Structure 5: Channel performance 7: Cable requirements 8: Connecting hardware requirements 9: Requirements for cords and jumpers A: Link performance limits 4: Requirements for installers 5: Requirements for premises owners 5: Requirements for premises owners Planning phase and EN 50173-4 EN 50174-2 EN 50174-2 4 and 5: Structure 6: Channel performance 8: Cable requirements 9: Connecting hardware requirements 10: Requirements for cords and jumpers A: Link performance limits 5: Requirements for planning installations of information technology cabling 6: Segregation of metallic information technology and mains power cabling 7: Additional considerations 4: Requirements for installers of information technology cabling 6: Segregation of metallic information technology and mains power cabling and EN 50174-3 and EN 50174-3 and (for equipotential bondin