Why are two small-appliance circuits always required?

NEC 210.52(B) requires at least two 20-amp small-appliance branch circuits to serve the countertop and other receptacle outlets in the kitchen. They may also serve the dining room and pantry, but they cannot supply lighting or built-in appliances.

Do kitchen countertop receptacles need GFCI protection?

Yes. NEC 210.8(A) requires GFCI protection for all kitchen receptacles serving the countertop surfaces, and recent editions extend GFCI to nearly all kitchen receptacles regardless of location. The tool flags this on the small-appliance circuits.

Does the dishwasher need its own circuit?

It is standard practice and often required. A built-in dishwasher is typically placed on an individual 15- or 20-amp circuit with GFCI protection per 210.8(D) and AFCI per 210.12, sized to its nameplate rating rather than shared with the disposal.

What about a gas range versus an electric range?

A gas range only needs a 120-volt outlet for the igniter and controls, which the small-appliance circuit can serve. An electric range needs a dedicated 120/240-volt circuit, commonly 40 to 50 amps on 8 or 6 AWG copper, sized to the nameplate.

Is AFCI required in the kitchen?

Yes in recent NEC editions. Section 210.12 requires arc-fault protection for branch circuits supplying kitchen receptacles in dwelling units. Combination AFCI/GFCI breakers or receptacles are commonly used to satisfy both requirements on the same circuit.

NEC Kitchen Circuit Requirements Calculator

A code-compliant residential kitchen needs more dedicated circuits than almost any other room. This tool takes the list of appliances you are wiring and returns the minimum required circuits per NEC 210.52, with the conductor size and GFCI/AFCI protection for each, so nothing gets shared that the code says must be dedicated.

How it works

The list always starts with the two mandatory small-appliance circuits, then adds an individual circuit per built-in appliance:

always:  2 × 20 A small-appliance circuits   (NEC 210.52(B), 12 AWG Cu)
+ each selected appliance → its own dedicated circuit
countertop receptacles  → GFCI (210.8(A))
kitchen branch circuits → AFCI (210.12)

The two small-appliance circuits serve the countertop receptacles and may extend to the dining room, but they cannot carry lighting or feed the built-in appliances. Each fixed appliance — dishwasher, disposal, microwave, and an electric range — gets its own circuit sized to its nameplate.

Example and notes

A typical full kitchen with a refrigerator, dishwasher, disposal, built-in microwave, and electric range needs seven circuits: the two small-appliance circuits plus one each for the five appliances. Swap the electric range for gas and the range simply rides the small-appliance circuit for its igniter, leaving you with the same count but a lighter service draw. Always verify the adopted NEC edition and any local amendments, since AFCI and GFCI scope has expanded across recent code cycles, and confirm each appliance’s nameplate before final breaker and conductor selection.