We are working on this mansion with a 600 amp panel and our boss wants to pull 250 kcmil aluminum wire (we don't even think his load "calculations" are correct for the house, probably only need 400 amp service). We have a guest house and a detached garage we are pulling to from the house. We measured the garage piping and it will be 450 feet and a 200 amp panel. The two journeymen on the job aren't getting the same numbers in their calculations for the of size wire we need, but we all agree that the boss is wrong because with the voltage drop that aluminum wire isn't going to cut it. What equations should we be using to calculate this? And what size wire should we actually be using?
Last edited by Conner; 10/29/13 07:16 PM.
