What is a grounding conductor?

• A. A protective device that automatically interrupts current.
• B. A structure used to support insulated cables in a facility or on a pole line, keeping conductors organized.
• C. A conductor that provides a low-impedance path to earth for fault current and safety.
• D. The maximum electric field a material can withstand.

Answer: (C)

A grounding conductor provides a low-impedance path to earth for fault current and safety. Its job is to bond metal enclosures and other non-current-carrying parts to earth so that, if a fault occurs, the fault current has a direct, low-resistance route to the ground. That quick path lets the overcurrent protective device (like a circuit breaker or fuse) detect the fault and interrupt the current, reducing shock risk and equipment damage. It’s typically a bare or green-insulated conductor connected to the system’s ground and to the earth at the service or along a pole line. It’s not meant to carry normal operating current, nor is it a protective device, nor a structural support for cables.