Originally posted by Bill Addiss:
It does sound like a bit of overkill to me. By way of comparison, the underground service installed by the utility here (LI, NY) for 200A service is only 1/0AL ! and distances over 100' are common. One 4/0 would be twice the size of our 1/0 for the same size service. That would probably be acceptable if there is no chance of ever needing over 200A service.
They allow 1/0 URD for 200A service!! THats outrageous. That barely compares to my #2 AL for my 100A service and it only runs about 40' to a URD pedestal. And when my one A/C kicks on its like...."Dang circuit must be operating again."
In my earlier post I said that the mAx for 200A svc was 4/0AL or 3/0cu. Well that is not what I meant. It is required for 200A svc. No bigger , no smaller.
Now for OH svc then yes we do install 1/0 svc drop, but the SE is required to be 4/0AL or 3/0cu.