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Electrical Wire Size Calculator

4.9/5 - (20 votes)

This should be used as a reference only. Please check with your electrical inspector or a licensed electrician for the proper wire size. There are many factors to consider before choosing the proper gauge.

wire size
wire size
Wire Size
Required Data Entry
Wire Type Copper Aluminum
Circuit Phase Single Phase Three Phase
Circuit Voltage 120 208 240 277 480
One Half The Total Circuit Length
Total Circuit Amperage

Calculated Results
Required Minimum Wire Size

Please don’t use this calculator for short service runs.