A green or bare wire in household wiring that is designed for safety. A ground wire is one of three wires in all household wiring. The ground wireÃ¢s purpose is to direct any short circuits into the ground instead of through a person.
The wire which goes from the negative post of the battery to the frame on negative ground vehicles. Another ground wire may be a thick wire or braided wire cable which connects the engine to the frame. Since many engines are rubber mounted, there may be no metal contact between the engine and the frame apart from the ground wire which may also be called the ground strap. In British terms, it is called "earth wire."