I have an existing 150A Service that needs to be relocated due to the new addition on home. Existing panel needs to stay in current location due to having to bring up to current code as far as Arc fault breakers on existing circuits. 6' rule for extending existing circuits. My Question can i upgrade to 200A and sub feed existing 150A panel. Do they make a plug in breaker of 150A which can be installed in a 200A Loadcenter to allow this. I was wanting to use GE panels. The new Service will be relocated to back side of new addition with room to add 4 new circuits for new addition.