BS_8519-2020.pdf

BS8519:2020BRITISH STANDARDFigure C.1-Example of test arrangement for horizontal service ducts(fire exposure fromoutside),adapted from BS EN 1366-5:200328Annex D(normative)Testing of Category 3 cables of core sizes up to and including 4 mm2 cross-sectional area29Annex E(normative)Determining the cross-sectional area of drop rods30Figure E.1-Typical thread detail identifying the major and minor diameters31Figure E.2-Elements of the cable support system32Table E.1-Maximum allowable stress of steel drop rods in fire conditions32Table E.2-Typical metric thread details(assumed to be coarse pitch)33Annex F(informative)Example voltage drop calculations for cables in a fire33Annex G(informative)Fire-resistant cables under fire and fault conditions36Table G.1-Temperature correction factors for copper36Annex H(informative)Cable protective systems to BS EN 1366-1137Annex I(informative)Guidance on calculating the mechanical loading on the drop rods37Figure 1.1-Example of mechanical loading on the drop rods38Annex(informative)Variation from the recommendations of BS 8519:202038Figure J.1-Model completion certificate-Design-Declaration of conformity39Bibliography40Summary of pagesThis document comprises a front cover,and inside front cover,pages i to iv,pages 1 to 40,an inside back cover anda back cover.II THE BRITISH STANDARDS INSTITUTION 2020-ALL RIGHTS RESERVEDBS8519:2020BRITISH STANDARDnew Clause 20 added providing recommendations for life safety and fire-fightingapplications;andnew informative Annex A on selection and specification of uninterruptable powersupplies(UPS).This publication can be withdrawn,revised,partially superseded or superseded.Informationregarding the status of this publication can be found in the Standards Catalogue on the BSI website by contacting the Customer Services team.Where websites and webpages have been cited,they are provided for ease of reference and arecorrect at the time of publication.The location of a webpage or website,or its contents,cannotbe guaranteed.Use of this documentAs a code of practice,this British Standard takes the form of guidance and recommendations.It should not be quoted as if it were a specification and particular care should be taken to ensure thatclaims of compliance are not misleading.Any user claiming compliance with this British Standard is expected to be able to justify any course ofaction that deviates from its recommendations.Presentational conventionsThe provisions of this standard are presented in roman(i.e.upright)type.Its recommendations areexpressed in sentences in which the principal auxiliary verb isshould.Commentary,explanation and general informative material is presented in smaller italic type,and doesnot constitute a normative element.The word shouldis used to express recommendations of this standard.The word mayis used inthe text to express permissibility,e.g.as an alternative to the primary recommendation of the clause.The word canis used to express possibility,e.g.a consequence of an action or an event.Notes and commentaries are provided throughout the text of this standard.Notes give referencesand additional information that are important but do not form part of the recommendations.Commentaries give background informationWhere words have alternative spellings,the preferred spelling of the Shorter Oxford EnglishDictionary is used(e.g.organizationrather than organisation).Contractual and legal considerationsThis publication does not purport to include all the necessary provisions of a contract.Users areresponsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.IV THE BRITISH STANDARDS INSTITUTION 2020-ALL RIGHTS RESERVED