Voltage Drop Calculator

Ensure NEC compliance for long runs.

Circuit Details

Voltage (V)

Phase

Conductor Material

Wire Size (AWG/kcmil)

One-Way Distance (ft)

Load Current (Amps)

Calculation Results

NEC Compliant

0.00%

Voltage Drop Percentage

Voltage at Load

0.0 V

Actual voltage reaching equipment

Details

Voltage Drop0.00 Volts

Max Length for 3% Drop0 ft

Based on NEC Chapter 9, Table 8 resistance values. Assumes 75°C conductor temperature.
NEC recommends max 3% drop for branch circuits to ensure efficient operation.