What is the function of a ground wire?

• A. To carry high voltage to the circuit
• B. To provide an alternate path for electrical current in case of a fault
• C. To increase power efficiency
• D. To serve as an insulator for cables

Answer: (B)

The function of a ground wire is to provide an alternate path for electrical current in case of a fault. In the event of a short circuit or equipment malfunction, the ground wire ensures that excess electricity has a safe route to the ground, which helps prevent electric shocks, fires, and damage to electrical equipment. By effectively redirecting this stray current away from users and sensitive components, the ground wire plays a crucial role in the safety and protection of both people and property.

The other options present functions that are not appropriate for a ground wire. For instance, carrying high voltage is not the role of a ground wire; it is specifically designed to manage faults rather than conduct standard operational current. Increasing power efficiency and serving as an insulator represent roles that are more aligned with other electrical components in a system, but neither aligns with the primary safety function of a ground wire.