Wire Size for 1.26 Amps
Typical copper wire gauges for 1.26 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 1.26A 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.
1.26A Wire Gauge by Distance
| Distance | Copper Gauge | V-Drop (Cu) | NEC Status |
|---|---|---|---|
| 25 ft | 14 AWG | 0.1978V (0.1649%) | OK |
| 50 ft | 14 AWG | 0.3956V (0.3297%) | OK |
| 75 ft | 14 AWG | 0.5935V (0.4946%) | OK |
| 100 ft | 14 AWG | 0.7913V (0.6594%) | OK |
| 125 ft | 14 AWG | 0.9891V (0.8242%) | OK |
| 150 ft | 14 AWG | 1.19V (0.9891%) | OK |
| 175 ft | 14 AWG | 1.38V (1.15%) | OK |
| 200 ft | 14 AWG | 1.58V (1.32%) | OK |
| 250 ft | 14 AWG | 1.98V (1.65%) | OK |
| 300 ft | 14 AWG | 2.37V (1.98%) | OK |
| 400 ft | 14 AWG | 3.17V (2.64%) | OK |
| 500 ft | 12 AWG | 2.49V (2.08%) | 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.