电气安装.docx
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电气安装.docx
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电气安装
SECTION17220
INSTALLATIONS–ELECTRICAL
1.INTERFERENCE
A.Equipment,devicesandmaterialsshallconformtoallperformancerequirementsofthespecificationswhenexposedtothefollowinginterference:
1.Electrical,lighting,telephoneandelevatorequipment.
2.VHFandUHFsignalsasgeneratedbyexternalorinternalportableorfixedtransmitters.
4.Electricalnoiseonthebuildingpowersystem,bothspuriousandharmonics.
B.Provideadequategroundingonallequipmenttopreventthebuild-upofelectromagneticvoltagepotentials.Provideshieldingofpanels,enclosures,devices,orcomponentsthatemitinterference.
C.Theinstallationsshallnotradiatesignalsthatcauseinterferencetothecorrectoperationofanyotheron-siteequipment.
D.Allelectricalequipment,devicesandcomponentsshallbeincompliancewithallrequirementsinrespecttotheradiationandconductionofradiofrequencyinterference.
2.POWERSUPPLIESANDSURGEPROTECTION
SurgeprotectionshallbeprovidedtoallpowersuppliesandalsotobothendsofanyexternallymountednetworkdatacablingsufficienttoprotectallnetworkequipmentfromthefollowingBS6651Appendix'C'surgewaveforms.
PowerSuppliesCategory'B'low2kV1.2/50µs
1kA8/20µs
DataCablesCategory'C'high5kV1.2/50µs125A8/20µs
3.ELECTRICALPOWERPROVISIONS
A.AllcomponentsoftheBMCSshallbebacked-upbyUninterruptedPowerSupplyprovidedbythisSubcontract.Allpowersupplieswillbesinglephaseandbeterminatedinadaptablejunctionboxeswithflexoutletplates.
B.AllpowersupplieswillbeprotectedbyMCBprovidedbyDivision16ontheelectricalsourcepanel.Wherefurtherdistributioninnecessaryintheformofsub-circuitstheSubcontractorshallensuresatisfactorydiscriminationwiththispowersourceisachieved.
C.TheSubcontractorshallprovideandinstallallnecessaryelectrical,controlandnetworkcablingandcontainmentwithinthisSubcontracttoprovideafullyfunctioningBMCSsystem.
D.TheBMCSSubcontractorshallconfirmwithinthebidsubmittalthatthesourcesandlocationsofelectricalpowerareadequatefortheproposedBMCS.AnyadditionalprovisionsrequestedwillbeaddedtotheDivision16scopeofwork.Ifconfirmationisnotreceived,orpowerisrequiredfortheBMCSinadditiontothatrequestedorconfirmed,thentheadditionalpowershallbeprovidedbytheBMCSSubcontractoratnoadditionalcosttotheOwner.Thisshallincludeallconduit,cabling,circuitbreakers,interfaces,etc.Allelectricalpowercabling,conduit,etc.providedbytheBMCSSubcontractorshallmeettherequirementsdetailedintheDivision16ContractDocuments.
4.CONDUITANDFITTINGS
4.01REFERENCESTANDARDS
A.Allmaterialsandaccessoriesshallbeofthehighestcommercialstandardandshallbedesigned,manufacturedandtestedinaccordancewiththelatestapplicablestandards.
B.AllmaterialsandworkmanshipshallconformtorelevantIEC,BSorequivalentinternationalstandardsandlocalcodeandstandards.
4.02Cableroutingsandinstallationmethodssuchastheuseofconduits,cabletrayandcabletrenchesshallalreadybeconsideredandincludedinthetenderpriceandschedule.Tenderpriceshallnotbeadjustedwithoutchangeofequipmentlocations.
4.03Allequipment,materialsandaccessoriesshallbesuitableforuseinthespecifiedconditionsandingeneral40oCand100%relativehumidity.
4.04Allmaterialsofthesametypeshallpreferablybetheproductsofthesamemanufacturertoensurecompatibility.Allsimilaritemsorequipmentshallbeinterchangeable.
4.05EachtypeofcablesspecifiedshallhavebeencertifiedbyaninternationallyrecognizedtestinglaboratorythatithasbeendesignedandmanufacturedtotheappropriateBSorIECpublication.
4.06Whenapplicable,thecurrentcarryingcapacitiesandvoltagedropofcablesshallbeequaltoorbetterthanthosetabulatedintheIEEWiringRegulations,withratingsadjustedtosuitlocalconditions,suchasgroupingmaximumambienttemperature,etc.
4.07AhighandlowwaterlevelprobeforthesoftenedwatertankshallbeprovidedbythePlumbingandDrainageSubcontractor.WiringofthewaterlevelalarmpointsfromthesoftenedwatertanktothecontrolpanelandequipmentshallbeprovidedbythisSubcontract.Thelowlevelalarmshallcutoffthecorrespondingpumpunittoprotectthepumpfromcavitation.Aresettablebuzzeralarminthepumpcontrolpanelshallbeprovidedandbeactuatedbythetanklevelalarms.
4.08SUBMITTALS
A.ThefollowingsubmittaldatashallbefurnishedaccordingtotheGeneralConditionsandSection15000andshallinclude,butnotbelimitedto:
1.Detailedscheduleofcables,conduits,controlpanels,materialsandaccessoriesdata,includingmanufacturers’testcertificatesanddocuments.
2.Cableroutingdrawingsshowingthecoordinatedroutingofcablesandlocationsofcontrolpanels.
3.Cablestraightandteejointsinstallationmethods.
4.GeneralContractor’sWorksrequirements.
B.Allitemsorequipmentlistedabovewithasterisks(*)shallbecertifiedbythemanufacturerusingManufacturerCertification“MCA”assetforthinSection15000.SeeSection15000forcertificationrequirements.
C.Specificationcompliancereviewrequired.RefertoSection15000.
4.09WARRANTY
ComplywiththerequirementsoftheGeneralConditionsandSection15000.
PART2-PRODUCTS
4.01ACCEPTABLEMANUFACTURERS
IfitcomplieswiththeseSpecifications,conduits,controlpanels,components,cablesmanufacturedbygoodlocalmanufacturersapprovedbytheLocalAuthoritieswillbeacceptable.
4.02PVCINSULATEDSHEATHEDCABLES
A.Cablesofthistypeshallbe600/1000VgradecomplyingwithBS6346,coppercore,PVCinsulatedandPVCsheathed.
B.ConductorsshallbeplainannealedcopperconductorscomplyingwithBS6360orIEC228.
C.InsulationshallcomplywithBS6476PVCtypeTllorequivalentinternationalstandard.
D.ThecoreofthecableshallbeidentifiedbytheappropriatecolourasspecifiedinBS6346throughoutthewholeoftheinsulation.TheoversheathofthecablesshallbeanextrudedlayerofblackPVCcomplyingwiththerequirementsofBS4066:
PartIorIEC332-1forflameretardance.
4.03PVCINSULATEDSTEELWIREARMOUREDCABLES
A.Cablesofthistypeshallbe600/1000VgradecomplyingwithBS6346,coppercore,PVCinsulated,extrudedPVCbedded,steelwirearmouredandPVCsheathed.ConductorsshallbeplainannealedcopperconductorscomplyingwithBS6360orIEC228,andeachconductorcoreshallbeofthesamecross-sectionalarea.
B.ThecoreinsulationshallbePVCtypeT11complyingwithBS6746orotherequivalentinternationalstandards.
C.FillingmaterialshallcomplywithBS6746TM1typeorotherequivalentinternationalstandards.
D.EachcoreofthecableshallbeidentifiedbytheappropriatecolourasspecifiedinBS6346throughoutthewholeoftheinsulation.
E.WirearmourshallconsistofasinglelayerofgalvanizedsteelwiresofthesizeintheappropriatetableinBS6346andcomplywithBS1442.TheoversheathofthecablesshallbeanextrudedlayerofblackPVCcomplyingwiththerequirementsofBS4066:
Part1orIEC332-1forflameretardance.
4.04CROSS-LINKEDPOLYETHYLENEINSULATEDSTEELWIREARMOUREDCABLES
A.Cablesofthistypeshallbe600/1000VgradecomplyingwithBS5467orIEC502andIECS11,coppercore,cross-linkedpolyethyleneinsulated,extrudedPVCbedded,steelwirearmouredandPVCsheathed.ConductorsshallbeplainannealedcopperconductorscomplyingwithBS6360orIEC228.Formulti-corecables,eachconductorcoreshallbeofthesamecross-sectionalarea.
B.Theinsulationofcoresshallbecross-linkedpolyethylenecomplyingwithBS6469orIECS11.
C.FillingmaterialshallcomplywithBS6746orotherequivalentinternationalstandards.
D.EachcoreofthecableshallbeidentifiedbytheappropriatecolourasspecifiedinBS6346throughoutthewholeoftheinsulation.
E.WirearmourshallconsistofasinglelayerofgalvanizedsteelwiresofthesizeintheappropriatetableinBS6346andcomplywithBS1442.TheoversheathofthecablesshallbeextrudedlayerofblackPVCcomplyingwiththerequirementsofBS4066:
PartIorIEC332-1forflameretardance.
4.05CABLEGLANDSANDACCESSORIESFORARMOUREDANDNON-ARMOUREDCABLES
A.AllcableglandsshallbemanufacturedandtestedtotherequirementsofBS6121.
B.AllcableglandsshallbemanufacturedfromunplatedbrasscomplyingwiththerequirementsofBS2874.
C.Cableglandsforarmouredcablesshallbeaccuratelymachinesandhavewater-tightsealsbetweenoutersheathandgland,andbetweeninnersheathandthreadfixingcomponent,withelectricbondformetallicinnersheath.Thebrassglandnutshallincorporateacone-griparmourclampwhichshallbedesignedtoensurethateacharmourwirecontributesequallytotheconductanceofthebondingconnection.Cableglandsfornon-armouredcablesshallbeaccuratelymachinedandhavewater-tightsealsonouterandinnersheath.
D.Eachcableglandshallbesuppliedwithabrassglandlocknut,plainbrassslip-onearthtagandflameretardancescrew-oncableglandshroud.Theearthtagshallbefiatcircuitringtypeandplacedbetweentheglandandtheapparatusintowhichitisscrewedtoensuremetaltometalcontactbetweentheearthtagandgland.ThethreadengagementshallnotbereducedtobelowthelimitsasspecifiedinBS4683orBS5501:
Part4whereappropriate.ThePVCshroudshalltotallyenclosetheglandbodyandformandeffectivesealdownontothecable'ssheathingoverall.Thebodyofcableglandsshallbestampedwithidentificationforthesize,typeandmanufacturer.
E.ForcableswhichareprotectedbyACBsorMCCBs,anintegrallycastea
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