Voltage Drop Calculator

This calculator will determine the minimum size conductor needed based on a
3% voltage drop. It does not take into consideration other factors such
as minimum ampacity based on the National Electric Code Table 310.15(B)(16)
(allowable ampacities of conductors). Consult the National Electrical Code Table
310.15(B)(16) for further details.

Please Choose Your Voltage:

120 Volts  208 Volts  240 Volts 277 Volts 480 Volts

Please Choose Your Conductor:

Copper  Aluminum 

Please Choose Your Phase:

Single Phase Three Phase


Distance in feet one-way:
Total amperage of circuit:


Minimum Wire Size:

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