2/0 is sufficient for 200A in copper.

--
Steve Barker

"Rick" wrote in message
ups.com...
I had a garage built and am wiring the building with 200A service
myself. At Lowe's, they have a sign that says the lead-in cabling for
200A service needs to be 4/0 - 4/0 - 4/0 - 2/0 aluminum cable. But,
one of their workers says that is wrong that the service cable must be
that size, but in copper. Anyone know for sure?