I use either a 320A metermain with (2)200A breakers installed to feed (2)200A 40ct ML panels or if they can be back to back with a 320A meterbase I use (2) 200A 40ct MB panels. I am currently upgrading a 320A service at a house to an 800A due to a 6500 sq.ft. addition. The PoCo is hitting my CT cabinet at the addition where it will feed a 800A ML panelboard with (1)400A CB to feed the old service and (2) 200A CBs to feed (2) 200A 42ct ML panels in the new addition. Houses around here keep getting bigger and stupider.
