Appliance electrical requirements by appliance: circuits, receptacles, GFCI and AFCI

Manufacturers state the supply they need on the rating label and in the installation instructions. The NEC requires equipment to be installed per its listing and instructions, so the model's sheet is the first reference, then the locally adopted code.

120 V appliances (refrigerator, dishwasher, washer, OTR microwave, disposer) are usually specified on a 15 A or 20 A fused, grounded circuit. Several makers recommend or require that the circuit serve only that appliance.

120/240 V appliances (electric dryer, range, wall oven, cooktop) use two hot legs plus a neutral, and on new work a separate equipment ground (4-wire). Heating elements run on 240 V; motors, lights and controls usually run on 120 V.

The 2023 NEC added a list of specific appliances whose branch circuit or outlet needs GFCI protection (including dishwashers, electric ranges, wall ovens, counter-mounted cooking units, clothes dryers and microwave ovens) for equipment rated 150 V or less to ground and 60 A or less, whether cord-connected or hardwired. Adoption and local amendments vary.

AFCI protection applies to 120 V, 10/15/20 A branch circuits feeding outlets in most dwelling rooms, including kitchens and laundry areas. 240 V range and dryer circuits are generally outside the AFCI rule, but they can fall under the newer GFCI rule.

When the appliance and the supply do not match (wrong receptacle, 3-wire vs 4-wire, undersized circuit), the fix is electrician work. The appliance tech's job is to measure, document and refer.