aelectricalman
Senior Member
- Location
- KY
Hello forum. Its been a while and I'm glad to be back. Hope I can get some good news here but thinking I'm probably not. We built a new electrical service with an overhead riser down to a trof, then split it into two 200 amp meter bases, where it fed 2 - 200 amp panels. My service manager accidentally sized the incoming feeder to the trof according to the load study done on the residence. Note: The previous panels were each 100 amps and the total service size was 200 amps. ( The homeowner did not expand the service size out of necessity, but rather due to desire. In hindsight, it appears the wire size feeding the trof is only 250kcmil and is undersized.
My question is, considering that there is obviously no need for two 200 amp services, and the utility only used 4/0 aluminum to feed both, is there an alternate method of calculation that will prevent us from having to remove the 250 kcmil, based on the fact that there is simply no need for any wire larger than 250 kcmil. I understand that 250kcmil is not correct for a 400 amp service with two independent 200 amp meters but is there a method that with engineering support could prevent us from having to remove this feeder?
What do you see is the easiest fix if not? Keep into consideration that the riser is 2.5 inch and spans an awkward 30 ft.
Thanks for you help.
My question is, considering that there is obviously no need for two 200 amp services, and the utility only used 4/0 aluminum to feed both, is there an alternate method of calculation that will prevent us from having to remove the 250 kcmil, based on the fact that there is simply no need for any wire larger than 250 kcmil. I understand that 250kcmil is not correct for a 400 amp service with two independent 200 amp meters but is there a method that with engineering support could prevent us from having to remove this feeder?
What do you see is the easiest fix if not? Keep into consideration that the riser is 2.5 inch and spans an awkward 30 ft.
Thanks for you help.
