Is it common practice to drive a ground rod and bond it to the case for a stand-by generator? Does it matter if the generator is considered a seperately derived system? For it to qualify as seperately derived the neutral has to be switched in the transfer along with the ungrounded conductors right?
Another thing I don't understand is that this transfer switch I received from Owens Cummings has the neutral lugs bolted,bonded to the case. Three of them for the service,load,and generator. If my understanding is correct, since this isn't considered a seperately derived system because the neutral isn't swiched shouldn't this neutral bar be isolated from the ground? If this is a violation where would I find it in article 250?
