Load Center 30S/42C MB 200A CU Generator ReadyThe Siemens generator ready load center can save thousands of dollars in future generator installation expenses while keeping initial expenses to a minimum. allowing for a combination of a load center, transfer switch and critical circuit sub panel into one neat enclosure. This version (model G3042B1200GEN) has a maximum amperage rating of 200 Amp and it also comes in a 225 Amp version. The load center has two interiors, both powered by utility power