Re: Sizing Wire (Considering Run Length)
The length at which on branch circuits the voltage drop exceeds 3% per 210.19(A)(1)(FPN4) or 3% on only the feeder per 215.2(A)(4)(FPN2) or a total of 5% from the OCD of the feeder to the last outlet on the branch-circuit. This is not an actual requirement, but considered for efficent operation. The short way, start doing calculations when lengths start exceeding 100 feet.