CoP for energy efficiency of electrical installati

EEnneerrggyyEEffffiicciieennccyyooffEElleeccttrriiccaallIInnssttaallllaattiioonnss22000077EEDDIITTIIOONNCCooddeeooffPPrraaccttiicceeffoorrCodeofPracticeforEnergyEfficiencyofElectricalInstallations,2007iForewordTheCodeofPracticeforEnergyEfficiencyofElectricalInstallationsaimstosetouttheminimumrequirementsonenergyefficiencyofelectricalinstallations.ItformsapartofasetofcomprehensiveBuildingEnergyCodesthataddressenergyefficiencyrequirementsonbuildingservicesinstallations.Designersareencouragedtoadoptaproactiveapproachtoexceedtheminimumrequirements.TheBuildingEnergyCodesweredevelopedbyadhoctaskforcesundertheEnergyEfficiency&ConservationSub-committeeoftheEnergyAdvisoryCommittee.ThesetofcomprehensiveBuildingEnergyCodescoverthisCode,theCodesofPracticeforEnergyEfficiencyofLightingInstallations,AirConditioningInstallations,andLift&EscalatorInstallations,andthePerformance-basedBuildingEnergyCode.TopromotetheadoptionoftheBuildingEnergyCodes,theHongKongEnergyEfficiencyRegistrationSchemeforBuildingswasalsolaunched.TheRegistrationSchemeprovidesthecertificationtoabuildingcomplyingwithoneormoreoftheBuildingEnergyCodes.Tosupplementandfurtherexplainthecodes,correspondingGuidelineswerealsopublished.AmendmentTheCodewasfirstpublishedin1998.Tosuitchangesintechnologicaladvancementandtocopewithtradepractices,therehavebeenamendmentstothefirstpublishededition,whichwereagreedincodereviewtaskforceswithmembersfromrepresentativeorganizationsinthebuildingindustryincludingprofessionalinstitutes,tradeassociationsandtheacademia.In2003,therequisiterequirementoncompliancewiththeotherthreeCodeswerewaived,themaximumallowablecopperlossrequirementondomesticbuildingswasrelaxed,themaximumallowableTHDrequirementonlift&escalatorcircuitwaswaivedshouldtheLift&EscalatorCodewasalreadycomplied,andthepositionofpowerfactorcorrectiondevicenotrightatthesourcewasconditionallypermitted.In2007,theMinimumMotorEfficiencyrequirementsareupgraded(Table5.1inCode);MaximumAllowableCopperLossrequirementsforexceedinglylengthycircuitsconditionallyrelaxed(inClause4ofCode);requirementonusingsynchronousbeltsinpowertransferdevices(previousClause5.4.4)waived;andaperformancerequirementasanalternativetoTHDcompliance(atendofClause6.1)introduced.CopyrightThisCodeiscopyrightedandallrights(includingsubsequentamendment)arereserved.TheBuildingEnergyCodesandRegistrationSchemedocumentsareavailablefordownloadat:[e-mail]--SSIITTEEFFOORRLLAATTEESSTTIINNFFOORRMMAATTIIOONNCodeofPracticeforEnergyEfficiencyofElectricalInstallationsiiCONTENTSPage1.SCOPE......................................................................................12.DEFINITIONS.............................................................................13.GENERALAPPROACH...............................................................34.ENERGYEFFICIENCYREQUIREMENTSFORPOWERDISTRIBUTIONINBUILDINGS44.1HighVoltageDistribution...................................................................4.2MinimumTransformerEfficiency........................................................4.3LocationsofDistributionTransformersandMainLVSwitchboard.......4.4MainCircuits.....................................................................................4.5FeederCircuits...................................................................................4.6Sub-mainCircuits...............................................................................4.7FinalCircuits......................................................................................44444555.REQUIREMENTSFOREFFICIENTUTILISATIONOFPOWER65.1LampsandLuminaires........................................................................5.2AirConditioningInstallations.............................................................5.3VerticalTransportation.......................................................................5.4MotorsandDrives..............................................................................5.5PowerFactorImprovement................................................................5.6OtherGoodPractice..................................................................................6677886.ENERGYEFFICIENCYREQUIREMENTSFORPOWERQUALITY96.1MaximumTotalHarmonicDistortion(THD)ofCurrentonLVCircuits..6.2BalancingofSingle-phaseLoads.........................................................9107.REQUIREMENTSFORMETERINGANDMONITORINGFACILITIES107.1MainCircuits..........................................................................................7.2Sub-mainandFeederCircuits.................................................................10108.SUBMISSIONOFIMFORMATION................................................10ElectricalForms:FORMEL-1:ElectricalInstallationsSummary....................................................11FORMEL-2:ElectricalPowerDistributionWorksheet........................................12FORMEL-3:ElectricalPowerUtilisationWorksheet..........................................15FORMEL-4:E