Kitchen Remodel: GFCI, AFCI, and Reusing a Two-Wire Circuit
A 1978 single-family dwelling is being remodeled. The kitchen has a 20A small-appliance circuit wired with 12/2 NM-B that has no equipment grounding conductor; the circuit feeds three existing receptacles and a new refrigerator outlet. The remodel adds an 8 ft by 3 ft island with a sink, a 1/2 hp disposer on a dedicated 20A circuit, a dishwasher on a dedicated 20A circuit, and a 700W microwave on a countertop circuit. The contractor proposes to reuse the existing two-wire circuit for the island receptacles, install standard 15A receptacles, and omit AFCI protection because 'the kitchen is all GFCI.' The panel is a 200A service with no spare spaces; a 20A AFCI/GFCI breaker is available for the dishwasher and disposal. The inspector must decide what to require before rough-in.
1. Which receptacle outlets in this kitchen require GFCI protection, and which branch circuits require AFCI protection? Explain how the existing two-wire circuit affects the answer.
Read the worked answer
Under the 2023 NEC, 210.8(A) requires GFCI protection for all 125V through 250V receptacles in a dwelling kitchen, not just countertop receptacles near the sink. That includes the island receptacles, refrigerator outlet, dishwasher receptacle, and disposal receptacle if it is cord-and-plug connected.
AFCI is a separate requirement. 210.12(A) requires AFCI protection for kitchen branch circuits, so 'the kitchen is all GFCI' does not satisfy it.
The existing 12/2 NM-B has no equipment grounding conductor. Replacing an existing receptacle on that circuit with a GFCI receptacle marked 'No Equipment Ground' and 'GFCI Protected' is permitted by 406.4(D)(2). But the new island receptacles are new outlets, and they would still lack an EGC. The better answer is to run a new 12/2 with ground to the island or provide a compliant EGC path. Do not accept standard 15A receptacles on the two-wire circuit.
2. Does the 2023 NEC require a receptacle on the island? If the contractor installs one, what rules apply?
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No. The 2023 NEC deleted the former 210.52(C)(2) requirement for at least one receptacle at an island or peninsula. If no island receptacle is installed, the inspector should not cite a missing island receptacle as a violation under the 2023 code.
If the contractor chooses to install one, it must still comply with the rules that remain. It must be GFCI-protected under 210.8(A), tamper-resistant under 406.12, and accessible. It cannot be mounted face-up in a countertop surface where water can collect. The general countertop receptacle spacing rules of 210.52(C)(1) apply to the wall and peninsula counter spaces, but they no longer compel an island receptacle.
The practical judgement is to verify what code edition the jurisdiction has adopted. A local amendment may still require the island receptacle. Without such an amendment, the inspector should enforce GFCI and tamper-resistance for any installed island receptacle, not a mandatory location.
3. Can the dishwasher and disposer be supplied from the two 20A small-appliance branch circuits? Explain.
Read the worked answer
No. NEC 210.52(B)(2) limits small-appliance branch circuits to supplying receptacles in the kitchen, pantry, breakfast room, dining room, or similar area. Fixed appliances such as a dishwasher and disposer are not receptacles, so they cannot be supplied from those circuits. Each appliance needs its own branch circuit or another circuit permitted by 210.11(C).
The dishwasher branch circuit also needs GFCI protection under 210.8(D) and AFCI protection under 210.12(A). A hardwired disposer does not require GFCI protection under 210.8(A) because there is no receptacle, but its branch circuit still needs AFCI protection because it is a kitchen circuit.
Reusing the two small-appliance circuits would also leave insufficient capacity for the required countertop receptacles. Require dedicated circuits for the dishwasher and disposer and keep the small-appliance circuits for receptacles only.