What is a GFCI and where is it required by code?

• A. Ground-Fault Circuit Interrupter; required in bathrooms, kitchens, outdoors, and other damp locations.
• B. General Fault Circuit Indicator; required in living rooms.
• C. Grounded Fault Current Interrupter; required only in industrial settings.
• D. Ground Fault Control Interface; required in service panels.

Answer: (A)

A GFCI is a safety device that monitors the current in a circuit and trips to cut power if it detects any imbalance between the hot and neutral conductors, which signals current leaking to ground. This fast response protects people from electric shock, especially in wet or damp environments. The code requires GFCIs in locations with higher shock risk—bathrooms, kitchens, outdoors, and other damp locations—so outlets in those areas are protected. The other named options aren’t the correct term for this device, and the requirement isn’t limited to industrial settings or service panels.