I'm about to wire for a 7500 KW Generac generator which is something my nephew has already done. In his case the system was wired by an electrician using a double pole 50amp breaker at the panel and 100amp wire. The system worked flawlessly. Then years later, in an attempt to upgrade the system, he called upon a second electrician that rewired using double pole 30amp breakers and 30amp wire sighting that the Generac was only providing 30amps and that the way the system was wired was overkill. Made sense at the time but when the first emergency took place, and the generator put to use, it surged and blew its breaker, while the fridge and fish tank pump made unnerving sounds, while lights would flicker and wall switches failed to work? He has since rewired to original and things are back to working fine.
My electrician is on the same page as my nephews second electrician, and who am I to argue with a professional, but I fear the same results if I wire using the 30amp logic.
Can anyone tell me why the 50amp breaker/100amp wire works while the 30amp solution fails??? Are the watts unavailable to the house due to circuit size?
Kind Regards, Bewildered