I am installing a 200A main breaker panel as my service disconnect. The Eaton BR816B200RF panel will have feed thru lugs on the bottom. I want to feed a 150A sub panel from those lugs. The subpanel will be 50 ft away and have it's own 150A breaker.
I would rather not run 4/0 Al SER cable if 2/0 Al is sufficient to feed the 150A subpanel. Not sure why the cable would have to be sized for 200A if it will never see current greater than 150A. This work will be inspected but in any case I want to follow the code. Can I use the 150A cable? Thanks.