GFCI is a device that protects people from dangerous levels of electrical current by measuring the current difference between two conductors; it trips when the difference is 6 milliamperes or higher.

GFCI is a device that protects people from dangerous levels of electrical current by measuring the current difference between two conductors; it trips when the difference is 6 milliamperes or higher.

• A. Grounding
• B. Hazard
• C. GFCI
• D. Load

Answer: (C)

A GFCI protects you by watching the current going out and coming back on a circuit. Under normal use, the current in the hot conductor equals the current in the neutral conductor. If some of the current leaks to ground—often through a person touching a live part—the amount leaving doesn’t all return, creating an imbalance. The GFCI detects that imbalance and trips to cut power, usually at a very small leakage level like 6 milliamperes, which is fast enough to prevent dangerous shock. This device isn’t about grounding itself or about a general hazard or load; it specifically responds to leakage to ground (a ground fault) by interrupting the circuit. It’s the protective mechanism that intervenes when a fault path could put a person at risk.

A GFCI protects you by watching the current going out and coming back on a circuit. Under normal use, the current in the hot conductor equals the current in the neutral conductor. If some of the current leaks to ground—often through a person touching a live part—the amount leaving doesn’t all return, creating an imbalance. The GFCI detects that imbalance and trips to cut power, usually at a very small leakage level like 6 milliamperes, which is fast enough to prevent dangerous shock. This device isn’t about grounding itself or about a general hazard or load; it specifically responds to leakage to ground (a ground fault) by interrupting the circuit. It’s the protective mechanism that intervenes when a fault path could put a person at risk.