I'm a little confused about kitchen refrigerator requirements. 550.12(B) calls out 20 amp small appliance circuits but implies in exception no. 3 that a fridge is permitted to be on an individual 15A branch circuit. But is it required to be? It makes sense for a large fridge to have its own breaker ... but what about a small beverage fridge? Could this use part of one of the small appliance breakers, or could it even be on another general wall outlet breaker? Thanks!