From one of the load calculation spreadsheets that are available on this form , I have determined the size of my service to a large home to be 380 amps, or as the spread sheet showed a 400 amp service. I have decided to install a 600 amp service and ct this, any thing over 400 amps here must be ct. This large home plan shows a future pool and pool house and unfinished basement that will be finished at some time. My real question is if I had decided to go with the 380 amps originally calculated could I use my 400 amp meter socket that is only rated at 320 amps continous load