BS英国标准BS EN 501742 Information technology — Cabling installation — Part 2 Installation .doc

BSI British StandardsBS EN 50174-2:2009BSI British StandardsInformation technology Cabling installation Part 2: Installation planning and practices inside buildingsNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWraising standards worldwideBS EN 50174-2:2009BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50174-2:2009. It super- sedes BS EN 50174-2:2001 which is withdrawn.The UK participation in its preparation was entrusted to Technical CommitteeTCT/7, Telecommunications - Installation requirements.A list of organizations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.©BSI 2009ISBN 978 0 580 57293 7ICS 33.040.50; 35.110; 91.140.50Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 July 2009Amendments issued since publicationDate Text affectedBS EN 50174-2:2009EUROPEAN STANDARDEN 50174-2NORME EUROPÉENNEEUROPÄISCHE NORM May 2009 ICS 35.110; 91.140.50Supersedes EN 50174-2:2000English versionInformation technology - Cabling installation -Part 2: Installation planning and practices inside buildingsTechnologies de l'information - Installation de câblages -Partie 2: Planification et pratiques d'installation à l'intérieur des bâtimentsInformationstechnik - Installationvon Kommunikationsverkabelung - Teil 2: Installationsplanungund Installationspraktiken in GebäudenThis European Standard was approved by CENELEC on 2009-05-01. 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.CENELECEuropean Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische NormungCentral Secretariat: Avenue Marnix 17, B - 1000 Brussels© 2009 CENELEC -All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.Ref. No. EN 50174-2:2009 EForewordThis 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 50174-2 on2009-05-01.This European Standard supersedes EN 50174-2:2000. The following dates were fixed:national standard or by endorsement(dop)2010-05-01latest date by which the national standards conflicting with the EN have to be withdrawn(dow)2012-05-01latest date by which the EN has to be implemented at national level by publication of an identicalEN 50174 comprises three parts. All three parts support the specification, implementation and operation of information technology cabling. There are specific requirements for cabling systems that are in accordance with the design requirements of the EN 50173 series. However, the three parts also apply to cabling systems of any design including those in accordance with standards such as EN 50098-1 or EN 50098-2.This part, EN 50174-2, is concerned with the planning and installation of information technology cabling using metallic cabling and optical fibre cabling inside buildings. It provides guidance as to the responsibilities of those involved and is intended to be referenced in relevant contracts.Additional clauses containing normative requirements for specific types of premises will be added as amendments, or as revisions, to this standard. At the time of publication of this European Standard, the following clauses are planned:homes;data centres;operator buildings.It does not cover those aspects of installation associated with the transmission of signals in free space between transmitters, receivers or their associated antenna systems (e.g. wireless, radio, microwave or satellite).This document contains two informative annexes:Annex A, providing information on EMC and protection;Annex B, containing a minimum set of responsibilities applicable to installers and enabling national- specific amendment to define other responsibilities.BS EN 50174-2:2009EN 50174-2:2009 59 ContentsIntroduction. 61Scope and conformance. 91.1Scope . 91.2Conformance. 92Normative references.103Terms, definitions and abbreviations . 123.1Terms and definitions . 123.2Abbreviations . 144Requirements for planning installations of information technology cabling . 154.1Safety . 154.2Documentation . 164.3Pathways. 164.4Pathway systems . 174.5Cable management systems . 184.6Closures . 204.7Cabling . 205Requirements for the installation of information technology cabling. 215.1Safety . 215.2Documentation . 225.3Installation practice . 225.4Surge protective devices. 285.5Labelling . 285.6Testing. 285.7Contractual acceptance . 296Segregation of metallic information technology cabling and mains power cabling. 296.1General. 296.2Requirements . 296.3Recommendations . 367Electricity distribution systems and lightning protection . 377.1Electricity distribution systems . 377.2Protection against lightning and induced overvoltages. 388Office (commercial) premises . 398.1General. 398.2Office (commercial) premises cabling design overview . 398.3Requirements for planning installations of information technology cabling . 408.4Requirements for installers of information technology cabling . 408.5Segregation of metallic information technology cabling and mains power cabling . 409Industrial premises . 409.1General. 409.2Industrial premises cabling design overview . 409.3Requirements for planning installations of information technology cabling . 419.4Requirements for installers of information technology cabling . 429.5Segregation of metallic information technology cabling and mains power cabling . 43Annex A (informative) EMC and protection . 44A.1Coupling mechanisms and countermeasures. 44A.2The EMC concept . 47A.3Filtering and electrical isolation components and surge protective devices . 51Annex B (informative) Application of responsibilities . 57Bibliography. 60FiguresFigure 1 Schematic relationship between the EN 50174 series and other relevant standards . 7Figure 2 Cable arrangement in a metallic section . 20Figure 3 Continuity of metallic cable management systems . 24Figure 4 Interruption of metallic cable management systems at fire barriers . 24Figure 5 Flowchart for cable separation calculation . 32Figure 6 Separation of mains power and information technology cables without dividers . 33Figure 7 Separation of mains power and information technology cables with dividers . 34Figure 8 Separation of cables in pathway systems . 35Figure 9 Structure of generic cabling in industrial premises . 41Figure 10 Configuration of apparatus-based functional elements within industrial premises . 41Figure A.1 Screened cables reduce capacitive coupling . 44Figure A.2 Electrical field to cable, capacitive coupling example. 46Figure A.3 Magnetic field to loop, inductive coupling example . 46Figure A.4 Magnetic field . 47Figure A.5 Earthing arrangement . 47Figure A.6 Earthing and bonding of filters .