Which device detects ground faults to prevent electric shocks?

Which device detects ground faults to prevent electric shocks?

• A. GFCI
• B. Breaker
• C. Fuse
• D. Switch

Answer: (A)

Ground-fault protection devices detect when current leaks to ground and shut off power to prevent shocks. They work by continuously comparing the amount of current flowing in the hot conductor with the current returning on the neutral. If any imbalance shows up, meaning some current is taking an unintended path to ground, the device trips almost instantly, usually in a fraction of a second, and disconnects power to stop the risk of electrocution. This is different from a breaker, fuse, or switch. A breaker or fuse protects against overcurrent or short circuits by interrupting the circuit when current becomes too high, but they don’t monitor leakage to ground. A switch simply opens or closes the circuit as a control. GFCIs (ground-fault circuit interrupters) are specifically designed to detect ground leakage and provide protection in locations where shocks are more likely, such as bathrooms, kitchens, and outdoors.

Ground-fault protection devices detect when current leaks to ground and shut off power to prevent shocks. They work by continuously comparing the amount of current flowing in the hot conductor with the current returning on the neutral. If any imbalance shows up, meaning some current is taking an unintended path to ground, the device trips almost instantly, usually in a fraction of a second, and disconnects power to stop the risk of electrocution.

This is different from a breaker, fuse, or switch. A breaker or fuse protects against overcurrent or short circuits by interrupting the circuit when current becomes too high, but they don’t monitor leakage to ground. A switch simply opens or closes the circuit as a control. GFCIs (ground-fault circuit interrupters) are specifically designed to detect ground leakage and provide protection in locations where shocks are more likely, such as bathrooms, kitchens, and outdoors.