Specification 034. Electrical Installations

1 DEFENCE ESTATES MINISTRY OF DEFENCE _____ Edition 1 - 2004 Specification 034 Electrical (POLYETHYLENE) :CABLESINCONDUIT, (PVC)MATERIALS28 SECTIONNINE- (DOMESTIC) , , ,CONTROL, (FORACCESSORIESANDEQUIPMENT)43 TABLE13 ACONNECTIONSTOAPPLIANCES47 TABLE14 ALAMPHOLDERS51 TABLE17 ACONDUCTORFIXINGS(LIGHTNINGPROTECTION)58 Edition1-2004 VSpecification034 ForewordThisSpecificationisoneof a seriespreparedbyDefenceEstates(DE)anagen cyoftheMinistryofDefence(MOD) isa revisionof theformerPropertySevicesAgency(PSA)Stand ardSpecification(M&E) , defencecontractthenitistobereadin asindicated , whereindicated or unlessotherwiseindicated areincludedin thetext,itisthedesigner/specifiersrespon sibilitytoensurethattheinformationreferr edto isincludedin thedocumentationpackage.

2 ( ). ,it may,therefore, ,nowarrantyis givenasto the16thEditionof theWiringRegulations,nowBritishStandard( BS)7671 ,2002(AMD13628) isrecognisedthatelectricalengineeringsta ndardsarerapidlychanging, newmaterialsandequipmentcomingintousesin cethelastissue,andminorcorrectionshavebe enmade.(Amajorreviewof thescopeandcontenthasnotbeenattemptedat thistime.) thisdocumentwillnotin (otherthanliabilityfordeathorpersonalinj ury)whatsoeverandhoweverarising(includin g,butwithoutlimitation,negligenceonthepa rtoftheCrown,itsservantsoragents)foranyl ossordamagehowevercausedwheretheStandard is :acalternatingcurrentBSRIAB uildingServicesResearchandInformationAss ociationBSBritishStandardBSENB ritishStandardEuroNormCNEC ombinedNeutralandEarthCOSHHC ontrolof SubstancesHazardousto HealthCPCC ircuitProtectiveConductordcdirectcurrent DEDefenceEstatesELVE xtralowvoltageEPRE thylenepropylenerubberESIE lectricitySupplyIndustryGLSG enerallightingserviceGRPG lassReinforcedPlasticHOFRH eatandoilresistantandflameretardantHVHig hVoltageICELI ndustryCommitteeforEmergencyLightingIDMT I nverseDefmiteMinimumTimelEEInstitutionof ElectricalEngineersIPIngressProtectionas definedin ,assembling,fixingin position,connecting,inspecting,testingan dleavinginworkingorder,new, ,unlessotherwiseindicated,allthematerial snecessaryto formacompleteinstallation,includingsucht ests.

3 Adjustmentsandcommissioningasareprescrib edin subsequentclausesandasmayotherwiseberequ iredto giveaneffectiveworkinginstallationto completeinstallation electricalequipmentconveyedbythisSpecifi cation,butalltheincidentalsundrycomponen tsnecessaryforthecompleteexecutionofthew orksandfortheproperoperationof theinstallation,whetherornotthesesundryc omponentsarementionedin detailin thetenderdocumentsissuedin thecontractdocumentsorotherwiseindicated willbesuppliedto ,workexternalto buildingsshallincludethesupplyandinstall ationof: sandforcablebeddingandcover cablewarningcovers,cablewarningtapesandc ablemarkers ,thefollowingwillbecarriedoutbyothers: trenching,holediggingandbackfihling ductlayingandconstructionofcabledrawpits tenderorin anappendixto the particularclauses .Theywillincludetheconditionsofcontract, particularclausesandanysupplementaryspec ifications, foundbetweenthisSpecificationandtherelat eddocuments,regulationsorstandards, acontractbeingplacedtheOfficershallbeasl istedinthedocuments; BS7671 , Contractor shallmean Subcontractor.

4 Asindicated , whereindicated , unlessotherwiseindicated ,refertoitemsorrequirementsindicatedelse wherein thetenderdocumentsissuedin connectionwiththecontract,forexampleona drawing,in ProjectManager shallmeananofficialof theMODor ,whererequired,consultwithcompetentperso nsto ,butnotlimitedto,thefollowing: Electricityat WorkRegulations1989 ElectricitySupplyRegulations1988 HealthandSafetyat Construction(DesignandManagement)Regulat ions1994 BS7671:2001 RequirementsforElectricalInstallations requirementsof thelocalelectricity,telecommunications,g asandwaterSuppliers; COSHHR egulations2002 Construction(WorkingPlaces)Regulations19 66 DangerousSubstancesandExplosiveAtmospher esRegulations2002(DSEAR) theInstitutionofElectricalEngineers(lEE) (DesignandManagement) ,whereindicated,withotherStandardsandSpe cifications, tender, ,eachitemofequipmentshallbeclearlyandind eliblymarkedtoindicatethestandardwithwhi chit Certificateof ComplianceshallbeprovidedfortheProjectMa nager, bemanufacturedorprovidedunderaparticular certification,licensingorqualityassuranc escheme,theManufacturerorSuppliershallbe a currentparticipantin Certificateof ComplianceshallbeprovidedfortheProjectMa nager,tobeincludedin ,errorsoromissionsondrawingsorotherdocum entationsuppliedbyhim,whethertheyhavebee napprovedbytheProjectManageror not,providedsuchdiscrepancies,errorsorom issionsarenotduetoincorrectinformationgi venin theirenclosures,appropriatederatingfacto rshavingbeenallowedfortheeffectoftheencl osures, theclosedposition, ,suitableforinternalandexternalconnectio n.

5 To enabletheexposedconductivepartsof thefactorybuiltassemblytobeconnectedto a paintedfinish,provisionshallbemadeforthe earthingterminaltobeelectricallyconnecte dto ;ifnecessary,proprietaryextensionboxessh allbefittedto ,non-ferrousglandplatesshallbeprovided,a ndthereshallbea clearanceof enclosureslocatedoutsidebuildingsorat otherlocations,asindicated,shallbeprotec tedagainstcorrosionbya hot-dipgalvanisedcoatingto BSENISO1461orbya zincsprayedcoatingtoBSEN22063withtheManu facturer themanufactureofGlassReinforcedPlastic(G RP)enclosuresshallbeabletowithstandconti nuouslyatemperatureof50 (IP) BSEN60439-2,andtheyshallnotbeusedto meansof isolationshallbeprovided;thenumberof eachbusbartrunkingsystemandshallbeidenti calin allsystemsin at leastonepositionanda meansof ,whereindicated,shallbeprovidedwithcover sorshutterstoscreenentrytoliveconductors whenthepositionis notoccupiedwitha eachtrunkingunitformingthesystemandto ,butallmeasurementsshallbecheckedonsitep riorto (MCB) ,fusesor MCB sshallbeincorporated, utilisationcategoryofAC-22or of facilityforpadlockingin the OFF , theindependentmanualclosingair-breaktype ,ratedforanuninterruptedduty, ,includingpowerclosingandundervoltagerel eases, the OFF , (orClassgMinmotorcircuits) , (MCBs) ,andbeofthetype, (RCBO) sshallcomplywithBSEN61008(RCCB s)orBSEN61009(RCBO s) ,ratedcurrent, ,inversedefmiteminimumtime(IDMT) ,typeofduty, , (ac)

6 Unlessotherwiseindicated, , ,coldandhotrolledsteelsectionsorslotteda ngles,complyingwithBSEN10162,10111,BS434 5andBSEN10025,10113,10130, galvanisedfinishwitha coatingequivalentto,andnotlessthan,typeZ 275toBSEN10147,butManufacturers ,brushedon,andfmishedmatchingtheManufact urers buildingorat , ,nuts, ,includingassociatedaccessories, ,nuts,washersandscrewsshallbenon-corrosi veandsuitablefortheenvironmentin clearworkingspaceforoperation, accordancewiththerecommendationscontaine din DefenceWorksFunctionalStandardDesignandM aintenanceGuide08:Spacerequirementsforpl antaccess, meettherequirementwiththedoorsclosed,equ ipmentshallbelocatedin theelevationareaof equipmentshallbemounted1450mmabovefinish edfloorlevelto thecentreoftheequipment, ,otherthanfloorstanding,factory-builtass emblies,shallbearrangedsothatnopartof theequipmentrequiringaccessforoperationo rmaintenanceshallbelessthan500mmormoreth an2000mmabovefinishedfloorlevel, fitintotheavailablespaceshallbecheckedbe foreitis PowerDistributionEquipmentareunabletobem et, ,charts, theoriginofeachinstallationshallbeat moreincomingsuppliesthisshallbeclearlyin dicatedat three-phasesupplyshallindicatethephaseto whichit is , ,andincluding,11kVshallcomplywithBS6480.

7 Theyshallbemass-impregnated,non-draining , ,andincluding,11kVshallcomplywithBS6480a sfarasitis (CNE)cablesupto andincluding, (XLPEorEPR) ,andincluding,33kVshallcomplywithIECS tandard60502or (XLPE)insulatedcablesupto,andincluding, ,BS7889or (PVC)insulatedcableupto,andincluding, ,andarmouredwithwireoraluminiumstrip, serving,of theManufacturer sstandardcolourforLVcablesandredforHVcab les, , theManufacturer beemployedaresuitableforthetypeof anappropriatetrainingauthorityin colouredcores,thesystemadoptedshallbecon sistentthroughoutallcablerunsand,onsites withexistinginstallations, thejointshallberecordedandincludedin 20047 Specification34 SectionThree anappropriatelysizedendboxwherephasing-o utis tobedone,thejointor fmalconnectionshallnotbemadeuntiltheProj ectManagerorhiscompetentrepresentativeha switnessed,andapproved, (CPC)andshallbeofa theexternalearthingterminaloftheequipmen tat bondingconductorsforLVcablesshallbecalcu latedorsizedin accordancewithTable54 GofBS7671.

8 AndHVcablesitshallbeto onepointonly,unlessindicatedotherwise,an dinsulatedglandsshallbeusedat theopen-circuitendor singlecorecables, ,wherepractical,in trefoilformationwheretheypassthroughencl osuresof joints,andat terminationsthecoresshallbeconnectedto earthat thesupplyendandin aspareterminalat ,in writing, , theshrinktype,appliedto theManufacturers jointsandterminationsshallbecompatiblewi th,andhaveatemperatureratingandinsulatin gpropertynotlessthan, , ,asfarasisreasonablypracticable, itsuse, ,withdetailsof theprecautionsthattheusermusttaketo , , ,jointsshallbemadewithinanassemblycompri singplumbedleadorcoppersleevesenclosedin ,purpose-madepapertubeorcrepepapertapein sulationis preferred8 Edition1 2004 Specification34 SectionThree ,andforjointsupto , , , , , ,thecoresshallbesweatedsolid,andforthela rgersizesandforaluminiumconductorsa , withinanequipmentenclosure, theenclosurethecableshallbesupportedbyab olt-onwipingglandat thefollowingtypes, ,splittype,cast-ironboxeswithfillinghole ssealedbyscrewedplugsorcaps, ,orprovidedwithporcelainbushingsor thetiertype,butshrinktypesleevesmaybeuse dsubjecttotheapprovalof (PVC) (XLPE/EPR)andThermoplastic(PVC) , ,theappropriatePartofBS4579, thecastresinor shrinktypeorcombinationof aluminium,butforallothersituationstheysh allbeofbrass, pre-mouldedproductsmaybeusedwhereanHVcab leterminationis withinanequipmentenclosure, theenclosurethecableshallbesupportedbya.

9 -Manufactures adviceshallbesoughtwhenreplacinga compoundfilledterminationwithaheatshrink typeterminationto pre-mouldedproductsmaybeusedwhereatermin ationispole-mounted,subjecttotheapproval of , thetypeof 20049 Specification34 SectionThree , , STOPEND meanstheprovisionof a permanentsealin 2004 Specification34 SectionFour Alarm,Control, specifiesthose, ,withorwithoutscreeningandarmouring, accordancewiththisSection,Section6,andSe ctions3,8,9or10, ,andappropriatepartsof ,jointsandterminationsshallcomplywiththe Manufacturer ,thejointboxshallbepositioneda shortdistancefrom,andatrightanglesto,the lineoftherouteandat ,permanentlyplasticcompoundhavinga highinsulationvalue,andshallbecompletely wrappedinThermoplastic(PVC) ,includingtee-jointshavinga branchcableof notmorethanfourcores, ,includingthearmouringandoutersheath,sha llbeclampedin cableshavingmorethan20pairs,includingtee -jointshavinga branchcableofnotmorethanfourcores, morethanfourcoresareto (POLYETHYLENE) linkdisconnectingunits(LDU), , (POLYETHYLENE) ,permanentlyplasticcompoundhavinga 200411 Specification34 SectionFour Alarm,Control, , cablesshallnotbeinstalledin thesameconduits,trunkingcompartmentsorca bleductingcompartmentsasBand1cables,unle ssotherwiseindicated,andanyrequirementst hatareindicatedforsegregatingcircuitsof , , ,to whichitis 2004 SectionFive , ,andthefollowingpreferencesshallbetakeni ntoaccount.

10 Forhorizontalruns-cabletrayorcablerack ( ) , ,cableracks,cableladder, , ,coastalandpollutedareaswhereferrousmate rialsareused,considerationshallbegivento theuseofstainlesssteelorsiliconsteelwith l2 ,plasticorGRP, ,communications,alarmandsimilarwiringsys tems, , , ,tees,risers,reducersandfour-waycrosspie cesshallbefactorymadewhereverpossible,an dshallbeofthesameconstruction,material, , , ,eachtiesecuringthecablesofonlyonecircui t~Thetiesshallbeofaproprietarytypelowinh alogen, lessthan600mmintervalsalongeachcable,and within100mmof regularintervalsinaccordancewithManufact urer 20 (LSF) bendsin , , , ,nuts, , ,betweencomponentpartsofcabletrays, , ,orbolts,washersandnutsConcrete,brickorb uildingblocksExpandinganchors,orscrewsan dplugs, ,asfaraspracticable, , ,spaceshallbeallowedalongcableroutesforf utureadditions, ,byoneofthemethodsspecifiedinSection5, , ,thesupportsshallbespacedtothecableManuf acturer , ,drainsandotherser