Wire Size for 2.79 Amps
Typical copper wire gauges for 2.79 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 2.79A 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.
2.79A Wire Gauge by Distance
| Distance | Copper Gauge | V-Drop (Cu) | NEC Status |
|---|---|---|---|
| 25 ft | 14 AWG | 0.438V (0.365%) | OK |
| 50 ft | 14 AWG | 0.8761V (0.7301%) | OK |
| 75 ft | 14 AWG | 1.31V (1.1%) | OK |
| 100 ft | 14 AWG | 1.75V (1.46%) | OK |
| 125 ft | 14 AWG | 2.19V (1.83%) | OK |
| 150 ft | 14 AWG | 2.63V (2.19%) | OK |
| 175 ft | 14 AWG | 3.07V (2.56%) | OK |
| 200 ft | 14 AWG | 3.5V (2.92%) | OK |
| 250 ft | 12 AWG | 2.76V (2.3%) | OK |
| 300 ft | 12 AWG | 3.31V (2.76%) | OK |
| 400 ft | 10 AWG | 2.77V (2.31%) | OK |
| 500 ft | 10 AWG | 3.46V (2.88%) | 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.