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Wire Size Calculator
This calculator will determine the minimum size conductor needed based upon a 3% Voltage drop. It does not take into consideration other factors such as minimum ampacity based on the National Electrical Code table 310-16. (Allowable ampacity of conductors) Consult the Electrical Code for further details.
This is your minimum wire size:

Select Appropriate Voltage
120 Volts  208 Volts  240 Volts 277 Volts 480 Volts
Select Appropriate Wire Type
Copper  Aluminum  
Select Phase of Circuit
Single Phase Three Phase
Enter Distance in Feet (one-way)

Enter Total Amperage of Circuit
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