Which device is designed to interrupt power when a ground fault is detected?

Which device is designed to interrupt power when a ground fault is detected?

• A. Ground fault interrupter
• B. Circuit breaker
• C. Grounding conductor
• D. Fuse

Answer: (A)

When a ground fault occurs, some of the current leaks out of its intended path to the ground. To protect people, you need a device that monitors the current in the hot and neutral conductors and immediately interrupts power if any imbalance is detected. This is exactly what a ground fault interrupter does. It continuously compares the two conductors and trips fast (often around 5 mA of leak) to stop the flow of electricity and reduce the risk of shock. That makes it the device designed specifically for detecting ground faults. The other options serve different protective roles: a circuit breaker protects against overcurrent or short circuits in general, not specifically ground faults; a grounding conductor is just a safe path to earth and doesn’t interrupt power; a fuse interrupts current when it overheats, but it isn’t dedicated to detecting ground faults.

When a ground fault occurs, some of the current leaks out of its intended path to the ground. To protect people, you need a device that monitors the current in the hot and neutral conductors and immediately interrupts power if any imbalance is detected. This is exactly what a ground fault interrupter does. It continuously compares the two conductors and trips fast (often around 5 mA of leak) to stop the flow of electricity and reduce the risk of shock. That makes it the device designed specifically for detecting ground faults.

The other options serve different protective roles: a circuit breaker protects against overcurrent or short circuits in general, not specifically ground faults; a grounding conductor is just a safe path to earth and doesn’t interrupt power; a fuse interrupts current when it overheats, but it isn’t dedicated to detecting ground faults.