Wire Size for 36 Amps

Typical copper and aluminum wire gauges for 36 amps across common run lengths on a 120V circuit, sized to keep voltage drop under 3% and respect the NEC 240.4(D) small-conductor rule. Actual install sizing depends on conductor material, insulation/termination temperature rating, cable type, ambient and bundling derates, and local code.

36A Wire Gauge by Distance

DistanceCopper GaugeAluminum GaugeV-Drop (Cu)NEC Status
25 ft 8 AWG 8 AWG 1.4V (1.17%) check_circle OK
50 ft 8 AWG 6 AWG 2.8V (2.33%) check_circle OK
75 ft 6 AWG 6 AWG 2.65V (2.21%) check_circle OK
100 ft 6 AWG 4 AWG 3.54V (2.95%) check_circle OK
125 ft 4 AWG 3 AWG 2.77V (2.31%) check_circle OK
150 ft 4 AWG 3 AWG 3.33V (2.77%) check_circle OK
175 ft 3 AWG 2 AWG 3.09V (2.57%) check_circle OK
200 ft 3 AWG 1 AWG 3.53V (2.94%) check_circle OK
250 ft 2 AWG 1/0 AWG 3.49V (2.91%) check_circle OK
300 ft 1 AWG 1/0 AWG 3.33V (2.77%) check_circle OK
400 ft 1/0 AWG 3/0 AWG 3.51V (2.93%) check_circle OK
500 ft 2/0 AWG 4/0 AWG 3.48V (2.9%) check_circle OK

Aluminum is not typical for 10 AWG and smaller branch-circuit conductors in residential settings. Copper gauges use the NEC 240.4(D) branch-circuit cap, not raw 75°C ampacity.

Other Amperages

This calculator provides estimates for reference purposes only. Always consult a licensed electrician and verify compliance with the National Electrical Code (NEC) and local electrical codes before performing any electrical work.