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Voltage Drop Calculator
Calculate voltage drop across your wiring run
Source Voltage (V)
Current (Amps)
Wire Gauge (AWG)
14 AWG
12 AWG
10 AWG
8 AWG
6 AWG
4 AWG
2 AWG
1 AWG
1/0 AWG
2/0 AWG
3/0 AWG
4/0 AWG
Material
Copper
Aluminum
One-way Distance (ft)
Phase
Single Phase
Three Phase
Calculate
NEC Voltage Drop Guidelines
National Electrical Code recommendations
3%
Max for Branch Circuits
5%
Max Total (Feeder + Branch)