The above figure illustrates the current wiring of standard

The above figure illustrates the current wiring of standard 120 VAC receptacles in the united States. Which of the following statements about the safety ground wire is false? The safety ground wire is usually green in color. Under normal (non-fault) conditions the voltage on the neutral wire is the same as the voltage on the safety ground wire. Under normal (non-fault) conditions the current in the neutral wire is the same as the current in the safety ground wire. A purpose of the safety ground wire is to trip the circuit breaker if the hot wire short-circuits to a metallic surface. A purpose of the safety ground wire is to keep metallic surfaces of electrical devices at earth around potential.

Solution

C) is the only false statement about Ground wire

because

under normal condition when recepticles is connected with a normal load (no fault) circuits become completed and currents flows through hot wire and returns via nutral wire not ground wire. so current through nutral and ground wire are not same.