Cust. wants 200 to 400a upgrade to account for added load at new pole blg. Is it allowed to serve the pole blg. via 2nd set of lugs in 400a MB ? At 120 ft. from MB to blg., feeding 100a panel w/main, what calculation do I use for cable size ? Also what's best method to bond blg. skin ? Thanks, Dan.
Dan,
You say, he wants 200 to 400a upgrade, did you do the load calcs., to determine what he really needs?
If you need to ask about calculation for cable size, your most likely over your head with the job.
