Wire Size for 1.74 Amps
Typical copper wire gauges for 1.74 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 1.74A 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.
1.74A Wire Gauge by Distance
| Distance | Copper Gauge | V-Drop (Cu) | NEC Status |
|---|---|---|---|
| 25 ft | 14 AWG | 0.2732V (0.2277%) | OK |
| 50 ft | 14 AWG | 0.5464V (0.4553%) | OK |
| 75 ft | 14 AWG | 0.8195V (0.683%) | OK |
| 100 ft | 14 AWG | 1.09V (0.9106%) | OK |
| 125 ft | 14 AWG | 1.37V (1.14%) | OK |
| 150 ft | 14 AWG | 1.64V (1.37%) | OK |
| 175 ft | 14 AWG | 1.91V (1.59%) | OK |
| 200 ft | 14 AWG | 2.19V (1.82%) | OK |
| 250 ft | 14 AWG | 2.73V (2.28%) | OK |
| 300 ft | 14 AWG | 3.28V (2.73%) | OK |
| 400 ft | 12 AWG | 2.76V (2.3%) | OK |
| 500 ft | 12 AWG | 3.45V (2.87%) | 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.