Wire Size 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 310-16. ( Allowable ampacitys of conductors ). Consult The Electrical Code for further details.

Please enter your values:

120 Volts Copper Aluminum
208 Volts Single Phase Three Phase
240 Volts
277 Volts
480 Volts

Distance in feet, one-way

Total amperage of circuit

This is your minimum wire size.
 

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