Multiple Service Groundings at single building

[smallfish]

Multiple service laterals serve one building with multiple occupancies each separated by fire walls. The first lateral serves a housekeeping panel in a separate room in the building where the coldwater metal underground pipe enters the building. A grounding electrode conductor grounds this housekeeping panel to the metal frame of the building. Another grounding electrode conductor connects this panel to a ground rod.

In order to bond all electrodes present at this building, is it permissible to simply run a bonding electrode jumper from the cold water pipe to the metal frame of the building since the grounding electrode conductors are already in place?

Is it permissible to ground the other occupancy services individually to the metal frame of the building, (each service location has already in place a driven ground rod), and then to size the bonding electrode jumper from the cold water pipe to the metal frame of the building (located in the room with the housekeeping panel) for the largest service entrance conductors of the largest service serving the building?

Thanks

 

[M. D.]

Though not my area of useful personal knowledge ,..I'll offer this article ,..towards the bottom they speak about multiple services.

 

[barbeer]

250.58 Common Grounding Electrode.
Where an ac system is connected to a grounding electrode in or at a building or structure, the same electrode shall be used to ground conductor enclosures and equipment in or on that building or structure. Where separate services, feeders, or branch circuits supply a building and are required to be connected to a grounding electrode(s), the same grounding electrode(s) shall be used.

Two or more grounding electrodes that are effectively bonded together shall be considered as a single grounding electrode system in this sense.

Imho you may use jumpers between steel and water.