Hope this isnt a dumb question but it came up in conversation. When you set a subpanel/generator transfer panel for resdential portable generator applications is it required that when you rerun the circuits over and back to the subpanel that you include a neutral for each of the circuits or does the Main neutral that you run to the sub suffice? Say you have 12 circuits you want to put on the generator sub. All 12 neutrals run with the circuit conductors? A single large neutral in each raceway? Or if yopu are running in a short 2" niple between panels ???? I have always run neuts for all but the conversation we had a few folks seem to think its not needed? I have always been of the opinion that the code always requires the neutrals to be run in the same raceway etc as the circuit conductors and one for each circuit. yes? No? Code ref?