The guys that are hooking up our J470 are setting it up for 60amps. However, for the subpanel they want to use a 50amp GFI. His reasoning is that if the circuit trips then the 50amp breaker will not compromise the line from subpanel to the main breaker.
It sort of made sense but I'm not sure if he's wrong, because if you hit the ~50amps wouldn't it trip the breaker at the subpanel?
Trying to understand if he's trying to cut corners.