Which statement describes the fault-current path in a properly grounded service?

Which statement describes the fault-current path in a properly grounded service?

• A. To stabilize voltage during normal operation
• B. To provide a path for fault current back to the source
• C. To minimize impedance in the hot path
• D. To maximize impedance

Answer: (B)

A properly grounded service is designed to provide a low-impedance return path for any fault current so it can flow back to the source and cause the protective device to trip quickly. When a fault occurs, current travels from the faulty conductor through the equipment grounding conductor to the service equipment and back to the transformer via the neutral-ground bond. This ensures enough fault current flows to open the overcurrent device, reducing shock risk and limiting damage. The other options miss the main purpose: grounding helps reference voltages and improve safety, but the fault-current path’s primary role is to allow the fault current to return to the source for rapid protection, not to maximize impedance or simply stabilize normal operation.

A properly grounded service is designed to provide a low-impedance return path for any fault current so it can flow back to the source and cause the protective device to trip quickly. When a fault occurs, current travels from the faulty conductor through the equipment grounding conductor to the service equipment and back to the transformer via the neutral-ground bond. This ensures enough fault current flows to open the overcurrent device, reducing shock risk and limiting damage. The other options miss the main purpose: grounding helps reference voltages and improve safety, but the fault-current path’s primary role is to allow the fault current to return to the source for rapid protection, not to maximize impedance or simply stabilize normal operation.