Grounding Electrode Conductor Taps to Ground rods

[electricgary]

I have an older Apartment Building that replaced the old water metal main to the building with plastic PEX type waterline. Need to add ground rods as water line was the Grounding Electrode. The building is 2 story 10 unit building with 5 unit flats on each floor. No multi-gang meter banks with disconnects. Each unit has a surface meter with split buss panels in each unit. 5 groups of 2 meters on back wall of building. Each meter has it's own underground Service Lateral feeding each individual meter with each meter feeding each electrical panel. My opinion is we have 10 separate individual Services and I will need to run a separate #6 copper grounding electrode conductor from each Electrical Panel to Ground Rods. My understanding of the NEC article 250 is that i can run a #6 copper or larger out of the farthest electrical panel and run to a pair of ground rods. I believe can the run a #6 copper out of the other 9 Electrical Panels and splice onto the length of G.E.C. running to the ground rods using "Burndy Hyground Compession Grounding Crimps Type YGC" like you would a grounding / bonding grid on a pool? Any opinions?

 

[ptonsparky]

The grounding electrodes can be connected at the meter, at the point of attachment, or the panels. Which one is the easiest?

 

[kwired]

How did they originally bond to water piping?

I can see you getting away with 10 separate services via 230.2(B)(1).

In such situations each occupancy is normally treated like a separate building, and I don't think you would be required to bond each service to a common GES - though I don't think it would be prohibited either.

 

[david]

I have an older Apartment Building that replaced the old water metal main to the building with plastic PEX type waterline.

When they replaced the old water main with PEX did they remove the old water pipe from the ground?

Each unit has a surface meter with split buss panels in each unit. 5 groups of 2 meters on back wall of building.

Does the meters have the additional terminal for the # six grounding electrode conductor?

This site says for post this is your first so Hi.