Her's a question, think about a strip mall with 6 stores. There is a main service pipe which runs into a trough. There is 6 meters all nippled off of the trough with the service cable (SEU Type)going into each store. Inside of each store is a service panel with a main breaker. Considering all of the wire sizes is correct and all of the grounding conductors are correct. The question comes, Can you connect the neutrals and the #6 exterior grounding conductor and the interior grounding conductor (that goes to the interior water pipe and is sized as per the service)inside of the trough? Can they all be connected with a split bolt connector? Or can they all be connected to a terminal bar inside of the trough?