I see portable generators cord connected via a 4 wire cord to a power inlet on a generator panel fairly frequently. What I would like to know is if the portable generator is bonded (internal to the unit) and the neutral is switched at the transfer switch (seperately derived system) a grounding electrode is required. Can a tap be run from the service GEC to accomplish this. If the neutral is not switched (not a seperately derived system), you have a bond at the generator on the load side of the service disconnect when the generator is plugged in.
