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Required GFCI installation locations

The ground-fault circuit interrupter (GFCI) must be installed in all locations specified by the National Electrical Code (NEC) 2023 edition, particularly in sections 210.8(A) for dwellings and 210.8(B) for non-dwelling occupancies. GFCI protection is designed to disconnect the circuit when it detects a ground-fault current equal to or greater than 5 mA ± 1 mA, reducing the risk of electric shock to persons. The requirement covers 125 V to 250 V receptacles, single-phase circuits up to 50 A, and three-phase circuits up to 100 A, depending on the environment.

Regulatory Requirements

Section titled “Regulatory Requirements”

GFCI protective devices must comply with Article 210.8 of the NEC 2023 and be installed in a readily accessible location. Protection may be provided by a combination type arc-fault circuit interrupter (AFCI) with integral GFCI or a GFCI receptacle. In the case of the receptacle, its load terminals can also protect downstream devices. The NEC establishes that the distance from a sink, bathtub, or shower stall is measured along the shortest path the equipment power cord would travel without passing through a floor, wall, ceiling, or fixed barrier. Starting with the 2023 edition, the exclusion for windows and doors was removed, meaning the measurement line may pass through them.

Locations in One- and Multi-Family Dwellings

Section titled “Locations in One- and Multi-Family Dwellings”

The following table summarizes areas within a dwelling unit where all receptacles must have GFCI protection, per NEC 2023 Section 210.8(A).

Location Applicable Distance
Bathrooms Entire area
Garages and accessory buildings Entire area
Outdoors Entire area
Crawl spaces (at or below grade) Entire area
Basements Entire area
Kitchens Entire area
Areas for food or beverage preparation or cooking Entire area
Sinks Receptacles within 1.83 m / 6 ft from the top inside edge of the bowl
Boat houses Entire area
Bathtubs or showers (outside bathroom) Receptacles within 1.83 m / 6 ft from the outside edge of the bathtub or shower
Laundry areas Entire area
Indoor wet or damp locations Entire area

Locations in Non-Dwelling Buildings

Section titled “Locations in Non-Dwelling Buildings”

For occupancies other than dwellings, GFCI protection is required for 125 V to 250 V receptacles, single-phase circuits 50 A or less, and three-phase circuits 100 A or less, in the locations indicated below (NEC 210.8(B)).

Location Applicable Distance
Bathrooms Entire area
Kitchens Entire area
Areas for food or beverage preparation or cooking Entire area
Buffet service areas (with permanent food or beverage provision) Entire area
Rooftops Entire area, with accessible access only from the rooftop itself
Outdoors Entire area
Sinks Receptacles within 1.83 m / 6 ft from the top inside edge; also applies to fixed or stationary equipment connected by cord and plug
Indoor wet or damp locations Entire area
Locker rooms Entire area
Garages, accessory buildings, and similar Entire area
Crawl spaces (at or below grade) Entire area
Unfinished areas of basements Entire area
Aquatic tanks or fish tanks Receptacles within 1.83 m / 6 ft from the top inside edge or the conductive support of the container
Laundry areas Entire area
Bathtubs or showers (outside bathroom) Receptacles within 1.83 m / 6 ft from the outside edge

In addition, GFCI protection is required for 20 V lighting outlets in crawl spaces, and for various appliances listed in 210.8(D) even if hard-wired (e.g., vending machines, sump pumps, electric ranges).

Exceptions to GFCI Protection

Section titled “Exceptions to GFCI Protection”

The NEC 2023 recognizes some limited exemptions from the general GFCI protection rule, including:

  • A receptacle dedicated exclusively to fixed electric deicing equipment, provided it is not readily accessible and has ground-fault protection of equipment in accordance with 426.28 and 427.22.
  • A receptacle that supplies only a permanently installed security system.
  • A receptacle for a bathroom exhaust fan in a dwelling, unless the manufacturer’s instructions indicate otherwise. If the fan is installed over the bathtub or shower footprint, GFCI is required per UL guide GPWX.

For rooftops in non-dwelling occupancies, GFCI receptacles need only be readily accessible from the rooftop itself.

Frequently Asked Questions (FAQ)

Section titled “Frequently Asked Questions (FAQ)”

How far from a sink is GFCI protection required in a dwelling?

Section titled “How far from a sink is GFCI protection required in a dwelling?”

GFCI protection is required for all receptacles located at a distance equal to or less than 1.83 m / 6 ft from the top inside edge of the sink bowl, measured along the shortest path the power cord would travel.

What is the maximum circuit current that requires GFCI in non-dwelling occupancies?

Section titled “What is the maximum circuit current that requires GFCI in non-dwelling occupancies?”

Single-phase circuits 50 A or less and three-phase circuits 100 A or less supplying 125 V to 250 V receptacles must have GFCI protection in the locations specified by the NEC.

How far from a bathtub or shower is GFCI protection needed?

Section titled “How far from a bathtub or shower is GFCI protection needed?”

GFCI protection is required for any receptacle that is 1.83 m / 6 ft or less from the outside edge of the bathtub or shower, even if not installed in a bathroom.

What distance from a receptacle to an aquarium requires GFCI?

Section titled “What distance from a receptacle to an aquarium requires GFCI?”

The requirement applies to receptacles 1.83 m / 6 ft or less from the top inside edge or the conductive metal support of the tank, including fish tanks, bait tanks, or similar open aquatic containers.

What leakage current trips a GFCI device?

Section titled “What leakage current trips a GFCI device?”

The GFCI device interrupts the circuit when it detects a ground-fault current equal to or greater than 5 mA ± 1 mA, protecting persons against electric shock.

In what type of crawl spaces is GFCI required for lighting?

Section titled “In what type of crawl spaces is GFCI required for lighting?”

GFCI protection is required for 20 V lighting outlets located in crawl spaces at or below grade, regardless of whether the space is used for storage or requires servicing.

References

Section titled “References”