A grounding wire, also known as an earth wire or protective earth wire, is a conductor that is used to connect an electrical appliance or device to the ground. The purpose of grounding wire is to provide a low resistance path for electrical current to flow to the ground in the event of a fault or short circuit.
When electrical devices are in use, they can build up static electricity or electrical charges. If this electricity is not properly discharged, it can create a shock hazard for people who come in contact with the device. By connecting the device to the ground, the grounding wire provides a safe path for this electricity to flow away from the device and into the ground.
Grounding wires are typically green or green with yellow stripes, and are often made of copper. They are an important safety feature in electrical systems, and are required by electrical codes in many countries.