6、elowvoltage,lightingsystemandroundingforlighteningsystematicalcompose,amongothersincludeloadcalculation,illuminationcalculation.Themajoronesare lighting andsocketsystem plan layout, equipment selection,accordingtotheroomilluminationrequirementsofthediffe
7、rentilluminationcalculationbasedontheresultsofthecalculation results choosethe appropriate lighting. Also on the supplyandlightningprotectiongroundingsystemdesign.Thepartofthelightcurrentmainlyincluding:CATV,elephoneandInternetsystemsandsoon,whichtheCATV