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Wire Ampacity Calculator

NEC 310.16 copper ampacity from wire size.

Inputs

Inputs and assumptions

12 AWG is 6530; 10 AWG 10380; 8 AWG 16510; 6 AWG 26240; 4 AWG 41740; 2 AWG 66360; 1/0 105600; 4/0 211600.

Result

Base ampacity (copper, 75C)
20 A
Max continuous load
16.0 A
Screening tool. Verify against the NEC as adopted locally, the AHJ, and nameplate data before acting.

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Workspace

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