Wire Size for 41.18 Amps

Typical copper and aluminum wire gauges for 41.18 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.

41.18A Wire Gauge by Distance

DistanceCopper GaugeAluminum GaugeV-Drop (Cu)NEC Status
25 ft 8 AWG 6 AWG 1.6V (1.33%) check_circle OK
50 ft 8 AWG 6 AWG 3.2V (2.67%) check_circle OK
75 ft 6 AWG 4 AWG 3.03V (2.53%) check_circle OK
100 ft 4 AWG 4 AWG 2.54V (2.11%) check_circle OK
125 ft 4 AWG 3 AWG 3.17V (2.64%) check_circle OK
150 ft 3 AWG 2 AWG 3.03V (2.52%) check_circle OK
175 ft 3 AWG 1 AWG 3.53V (2.94%) check_circle OK
200 ft 2 AWG 1 AWG 3.2V (2.66%) check_circle OK
250 ft 1 AWG 1/0 AWG 3.17V (2.64%) check_circle OK
300 ft 1/0 AWG 2/0 AWG 3.01V (2.51%) check_circle OK
400 ft 2/0 AWG 3/0 AWG 3.19V (2.65%) check_circle OK
500 ft 3/0 AWG 4/0 AWG 3.15V (2.63%) 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.