What Size Wire for an Electric Wall Oven?
Wire and breaker sizing for an Electric Wall Oven — the typical 240V circuit, plus the code details (NEC 310.16) that change the answer.
Calculations are built on the 2023 National Electrical Code (NEC) and cross-checked against the published code tables. How we verify. Last reviewed June 2026.
On a 30A 240V circuit at 75°C terminations.
Protected by a 30A breaker (NEC 240.6).
Electric Wall Oven current varies by model. The size above is the common case — always size the conductor to the unit’s nameplate rating and protect it at the labeled maximum breaker/fuse.
GFCI required. The 2023 NEC (210.8(D) for specific appliances, 210.8(A) for kitchen/outdoor receptacles) requires GFCI protection here. Verify the code edition your jurisdiction has adopted.
Electric Wall Oven Circuit Details
- Single wall ovens are commonly 30A (10 AWG copper); large or double ovens may need 40–50A.
- Always size to the nameplate kW rating.
- Most are hardwired through a junction box.
Long run to your electric wall oven?
Over distance, voltage drop can require a larger wire than the table above. See the 30A wire size by distance:
Size it for your exact install
Open the calculator pre-filled with 30A at 240V to add distance, material and temperature.