I in believe if you have the grounded conductor bonded at both the service and the generator, that it requires you to break the neutral with a four pole transfer switch.

While the neutral is conducting current, with both systems bonded, you will allways have some current flowing on the equipment ground between the two. That is unless you break the circle by opening the neutral.

[This message has been edited by russ m (edited 02-05-2004).]