<P> In Australia and South Africa, a house's earth cables must be connected both to an earthing rod driven into the ground and also to the plumbing or gas pipe . In Australia a house's earth cable must be connected to all reinforcing mesh in any concrete under any bathroom and in any swimming pool . </P> <P> In aircraft, electrical bonding prevents static electricity build - up that can interfere with radio and navigational equipment . Bonding also provides lightning protection by allowing the current to pass through the airframe with minimum arcing . Bonding prevents dangerous static discharges in aircraft fuel tanks and hoses . </P>

When does an electrical panel need to be bonded