Re: Grounding and neuteral bonding
The article you are referring to is 250.32(B)(2), I think the important part of this is section 2 which I highlighted.
250.32(B)(2) Grounded Conductor.
Where
(1) an equipment grounding conductor is not run with the supply to the building or structure,(2) there are no continuous metallic paths bonded to the grounding system in both buildings or structures involved, and (3) ground-fault protection of equipment has not been installed on the common ac service, the grounded circuit conductor run with the supply to the building or structure shall be connected to the building or structure disconnecting means and to the grounding electrode(s) and shall be used for grounding or bonding of equipment, structures, or frames required to be grounded or bonded. The size of the grounded conductor shall not be smaller than the larger of
(1) That required by 220.22
(2) That required by 250.122
Can you say that "there are no continuous metallic paths" between these three structures.
This could be metal water mains, cable TV service, etc. or even your raceway if it is RMC or IMC
If you can say there are no other paths for current to flow on I believe you are correct.
Did you ask the inspector why he was failing this as installed, maybe he sees some parallel paths for current to flow on
Or maybe he is like myself, who is just not used to seeing 3 wire feeders for 240/120 load side equipment.
I am not saying you are wrong, just that many of us are much more used to seeing a separate ground and neutral on anything past the service disconnect.
Good Luck.