GFCI Outlet Placement: NEC Requirements by Room

Ground Fault Circuit Interrupter (GFCI) protection is one of the most important safety features in residential electrical systems. GFCI devices detect tiny amounts of current leakage that indicate electricity is flowing through an unintended path — like a person — and interrupt the circuit within milliseconds. Knowing where the NEC requires GFCI protection helps you ensure your home meets code and protects your family.

How GFCI Works

A GFCI monitors the difference in current between the hot and neutral conductors. In a properly functioning circuit, the current flowing out on the hot equals the current returning on the neutral. If the difference exceeds 5 milliamps (indicating a ground fault), the GFCI trips in 1/40th of a second — fast enough to prevent electrocution in most cases.

Bathrooms

GFCI protection is required for all 125V, 15 and 20-amp receptacles in bathrooms. This includes all outlets at vanities, near tubs and showers, and anywhere else in the bathroom. There’s no minimum distance from water — all bathroom outlets require GFCI regardless of location.

Kitchen Countertops

All receptacles serving kitchen countertops require GFCI protection. Countertop receptacles are those within 6 feet of a sink. The NEC also requires that small appliance circuits in kitchens (which serve countertops) be 20-amp circuits — use 12 AWG wire.

Garages and Outdoors

All 125V and 250V receptacles in garages require GFCI protection. All outdoor receptacles require GFCI protection. There’s no exception for height above grade — every outdoor outlet needs GFCI.

Crawlspaces, Unfinished Basements, and Boathouses

Receptacles in crawlspaces at or below grade require GFCI. Unfinished areas of basements require GFCI for all receptacles. Finished basement areas now fall under broader GFCI/AFCI requirements in recent code cycles.

GFCI Outlet vs GFCI Breaker

Both provide equivalent protection. A GFCI outlet protects itself and all outlets wired downstream of it (in the LOAD connection). A GFCI breaker protects all outlets on the entire circuit. GFCI breakers are more expensive but eliminate the need for individual GFCI outlets throughout the circuit — useful for unfinished basements and garages with many outlet locations.

Map your required GFCI locations. Use the Circuit Planner on electricalcalcpro.com to lay out your circuits with proper GFCI and AFCI protection assignments for every room.