I have to upgrade the service I have for an exterior building. The wiring follows the old code, and I'll need a permit to do it.
So I am going to have to update the service and everything to the newest code regulations, but have a little confusion on the bonding of the ground and neutrals.
Typically you bond the ground and neutral at the first cut off point after the meter, be that a panel or a disconnect.
But the meter and disconnect sit on one building, and the panel and grounding system sit at another building, with about 115feet of distance between them.
From what I understand, in theory, the area that you bond, should also be the entry point for the grounding. (I could be wrong about this though)
Aka my ground should initially enter my disconnect, then bond, then travel the 115 ft to my panel.
But since the grounding point is at the panel, I am not sure how to handle this.
I am not sure if I need to bring my ground wire, straight to the disconnect, then back to the panel.
Or Install a new ground bar at the disconnect, just to do the bonding and then tie the other ground system into it at the disconnect
Or do it as I have illustrated in the drawing attached
(which I believe might be the correct way of handling this)
bring the ground into the panel
tie it to the ground bar only
push it back through the conduit to the disconnect and bond it with the neutral there.