Where are arc fault breakers (AFCI) required per NEC 210.12?

Under NEC 210.12(A), AFCI protection is required on all 120V, 15A and 20A branch circuits supplying outlets in dwelling unit kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, laundry areas, and similar rooms. AFCI is not required in bathrooms, garages, or outdoor areas.

Where are GFCI outlets required per NEC 210.8?

NEC 210.8(A) requires GFCI protection in dwelling unit bathrooms, garages, outdoors, crawl spaces, basements, kitchens (countertop and within 6 ft of sink), laundry areas (2020 NEC+), and near sinks. NEC 210.8(B) extends GFCI requirements to commercial locations including bathrooms, kitchens, service bays, rooftops, and outdoor areas.

How do I use this GFCI and AFCI requirement checker?

Select your building type (Dwelling Unit or Commercial) and your NEC edition (2017, 2020, or 2023). The checker instantly displays every room and location with color-coded GFCI and AFCI badges, the exact NEC code citation, and the recommended protection device. Click any room card to expand the full code explanation.

What is the difference between GFCI and AFCI protection?

GFCI (Ground Fault Circuit Interrupter) protects people from electric shock by detecting current leaking to ground. AFCI (Arc Fault Circuit Interrupter) protects structures from fire by detecting dangerous electrical arcing in wiring. GFCI is required in wet and damp locations; AFCI is required in habitable rooms. Some locations (like laundry areas in 2020+ NEC) require both.

Which rooms require both GFCI and AFCI protection?

Under 2020 and 2023 NEC, laundry areas require both GFCI protection per NEC 210.8(A)(10) and AFCI protection per NEC 210.12(A). Kitchens require GFCI for countertop receptacles per 210.8(A)(6) and AFCI for all branch circuits per 210.12(A) (added in 2017 NEC). A dual-function AFCI+GFCI breaker is the most practical solution for these locations.

What changed between the 2017, 2020, and 2023 NEC for GFCI and AFCI?

2017 NEC added AFCI requirements for kitchens. 2020 NEC expanded GFCI to cover all basements (not just unfinished), laundry areas, indoor damp locations, and sinks beyond kitchens and bathrooms. The 2023 NEC added GFCI for dishwasher outlets and further expanded outdoor and garage receptacle coverage. AFCI requirements remained largely the same from 2017 to 2023.

Frequently asked questions about GFCI and AFCI requirements

Common questions: AFCI requirements apply only to dwelling units — not commercial buildings. GFCI applies to both dwelling and non-dwelling occupancies per NEC 210.8(A) and 210.8(B). A dual-function AFCI+GFCI breaker satisfies both requirements with one device. Arc fault breakers are required where AFCI is specified. NEC adoption varies by state — always verify with the local authority having jurisdiction.

⚡ NEC Reference Tool

GFCI & AFCI Requirement Checker

Where are arc fault and GFCI breakers required? — NEC 210.8 · NEC 210.12 · Room-by-room with exact code citations

⚙️ Configuration

Building Type

🏠 Dwelling Unit

🏢 Commercial / Other

NEC Edition (local adoption varies)

2017 NEC

2020 NEC

2023 NEC

GFCI Required

AFCI Required

Both Required → Dual-Function Breaker

Neither Required

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GFCI
Required

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AFCI
Required

—

Both
Required

—

Neither
Required

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VoltageLab's AI Code Lookup has every NEC article explained in plain English — NEC 210.8, 210.12, and every other section searchable from your phone in seconds. Used by journeymen, masters, and exam candidates across the USA.

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GFCI requirements per NEC 210.8(A) (dwelling units) and NEC 210.8(B) (non-dwelling occupancies).
AFCI requirements per NEC 210.12(A) — applies to dwelling units only. Non-dwelling units: consult NEC 210.12(B) for dormitories.
NEC adoption varies by state and jurisdiction. Always verify requirements with the local Authority Having Jurisdiction (AHJ).
This tool references the 2017, 2020, and 2023 National Electrical Code editions.

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GFCI & AFCI Requirement Checker

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