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.

3 Testingandleavinginworkingorder,new, ,unlessotherwiseindicated,allthematerial snecessaryto formacompleteinstallation,includingsucht ests,adjustmentsandcommissioningasarepre scribedin 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.

4 Theywillincludetheconditionsofcontract,p articularclausesandanysupplementaryspeci fications, foundbetweenthisSpecificationandtherelat eddocuments,regulationsorstandards, acontractbeingplacedtheOfficershallbeasl istedinthedocuments; BS7671 , Contractor shallmean Subcontractor . 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.

5 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.

6 Errorsoromissionsarenotduetoincorrectinf ormationgivenin theirenclosures,appropriatederatingfacto rshavingbeenallowedfortheeffectoftheencl osures, theclosedposition, ,suitableforinternalandexternalconnectio n,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.

7 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)

8 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.

9 Theoriginofeachinstallationshallbeat moreincomingsuppliesthisshallbeclearlyin dicatedat three-phasesupplyshallindicatethephaseto whichit is , ,andincluding,11kVshallcomplywithBS6480; 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)

10 Andshallbeofa theexternalearthingterminaloftheequipmen tat bondingconductorsforLVcablesshallbecalcu latedorsizedin accordancewithTable54 GofBS7671: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.