WAct on Product Safety of Electrical Appliances and Materials
WANSI Z535
WAntistatic device
WCEBEC
WChassis ground
WCircuit integrity
WEarth potential rise
WElectric power transmission
WElectrical injury
WElectrical burn
WElectrical equipment in hazardous areas
WElectrical Safety Foundation International
WElectrostatic discharge
WENEC Mark
WExtra-low voltage
WGround (electricity)
WGrounding resistance tester
WHigh voltage
WHot stick
WIsolation transformer
WLightning arrester
WLightning rod
WLive-line working
WMeasurement category
WMr. Ouch
WNational Electrical Code
WOhmmeter
WOpto-isolator
WResidual-current device
WResistive opto-isolator
WThunder house
WVoltage portal
WWar of the currents
WZax (Duke Power)