Wire Size for 28.66 Amps
Typical copper wire gauges for 28.66 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. At 28.66A the load sits in residential-branch territory where aluminum is not a typical conductor, so the table lists copper only. Actual install sizing depends on conductor material, insulation/termination temperature rating, cable type, ambient and bundling derates, and local code.
28.66A Wire Gauge by Distance
| Distance | Copper Gauge | V-Drop (Cu) | NEC Status |
|---|---|---|---|
| 25 ft | 10 AWG | 1.78V (1.48%) | OK |
| 50 ft | 10 AWG | 3.55V (2.96%) | OK |
| 75 ft | 8 AWG | 3.34V (2.79%) | OK |
| 100 ft | 6 AWG | 2.81V (2.35%) | OK |
| 125 ft | 6 AWG | 3.52V (2.93%) | OK |
| 150 ft | 4 AWG | 2.65V (2.21%) | OK |
| 175 ft | 4 AWG | 3.09V (2.57%) | OK |
| 200 ft | 4 AWG | 3.53V (2.94%) | OK |
| 250 ft | 3 AWG | 3.51V (2.93%) | OK |
| 300 ft | 2 AWG | 3.34V (2.78%) | OK |
| 400 ft | 1 AWG | 3.53V (2.94%) | OK |
| 500 ft | 1/0 AWG | 3.5V (2.91%) | OK |
Copper gauges use the NEC 240.4(D) branch-circuit cap, not raw 75°C ampacity.
Also Calculate
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.