Help! I'm working on a bid and my "handy" electric calculator is giving me conflicting answers on wire size for a long run. The run is almost 400 feet(up and down included) from the main panel to the sub panel. 100 amps 120/208 3 phase. Using copper THHN and 3% VD, what size wire?
While we're at it, how much would you bid? Most of the run is 25ft in the air and you need to add 3 30 amp 3 phase outlets to plug in equipment near the new sub. The panels are seimens bolt in and the conduit needs to bew EMT, you provde the lift. Thanks!
