WElectrical wiring
WAluminium-conductor steel-reinforced cable
WBus duct
WCable tray
WCeiling rose
WCircuit breaker
WConsumer unit
WCopper conductor
WCopper-clad aluminium wire
WCopper-clad steel
WElectrical busbar system
WElectrical cable
WElectrical conduit
WElectrical outlet tester
WElectrician
WExtension cord
WFuse (electrical)
WGround (electricity)
WIndustrial and multiphase power plugs and sockets
WKeystone wall plate
WKnob-and-tube wiring
WLake Erie Connector
WMains electricity by country
WMineral-insulated copper-clad cable
WMulticore cable
WNational Electrical Code
WNational Electrical Contractors Association
WNational Inspection Council for Electrical Installation Contracting
WPower cord
WRat-tail splice
WResidual-current device
WStar quad cable
WT-splice
WTechnical standards in Hong Kong
WTeck cable
WThree-phase electric power
WTwist-on wire connector
WVacuum interrupter
WWestern Union splice
WWiring closet
WWiring diagram
WZip-cord