Of course. You'd have that neutral-through-ground loop that parallels the neutral current the wrong way if neutral is connected in common.
I don't know if the generator will bond them or not. I figure if it doesn't, it can be made to, anyway (to be a SDS).
But do consumer grade generators do that? I'm curious why the local electricians said I didn't need to transfer the neutral.
I'm looking at getting a generator around 8K to handle refrigerator and freezer starts, and one that can make a reasonable waveform for a UPS for the computers (though I will be getting a new double conversion type that should work better). My next door neighbor has a 14K one which I think was formerly a construction site type.
Last edited by pdh; 11/03/12 08:53 PM.