We've included a useful voltage drop calculator to assist in determining the correct wire gauge size to use for your application. Please realize that the calculator is only as good as the data going into it so please double check!

With the calculated output you will be able to use the voltage drop as a factor in determining the correct cable size to use. Different installations might be governed by different codes which will control for a minimum allowed wire size or a lower temperature rating on the conductor so while this calculator will provide the voltage drop it is only one of the factors in determining the correct wire size to use.