|reply to ropeguru |
Re: The renovation continues ... today new 400 amp service!
Fixed a typo above and added my thoughts. While he wasn't referring to the terminations, you have to in order to get the correct handling capacity of the feeder run. The wire alone isn't what determines what it can carry, but also what it terminates into.
If you want to focus in the wire alone and in all technicalities, it as well isn't rated for 400 amps, even at 90C.
Do i ever expect 400amps @ 240v worth of load on his service regularly? I have no idea, but it isn't plausible, as if a load calculation pushed him to that point they would have oversized again.
IN technical terms is the service setup as rated? No. But the utility also isn't bound by the NEC, but their own set of guidelines on how to install things.
Fort Wayne, IN
I was just going by the wire being stamped 350 kcmil, which by NEC table 310.15(B)(7) seems to indicate a max of 300 amps. I was under the impression that the service wires had to be at least as big as what the combined main disconnects protected to, but maybe not.
said by Killa200:Aren't service entrance cables covered under NEC, but not transmission lines?
But the utility also isn't bound by the NEC, but their own set of guidelines on how to install things.
said by cdru:Hmmm, that may be true. I'm going to remit on an answer from that and instead hope whiz or nunya chimes in.
Aren't service entrance cables covered under NEC, but not transmission lines?