Multifamily Grounding

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lagaceelectric

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CT
I have a condo building I am doing that has a modular 6 gang meter socket each with a 100 amp disconnect then i will be running #2 SER to each sub panel in the individual units. My Question is what size water bond wire must i run to the water main which is at the other end of the building? Then can i just jump to the sprinkler main with the same wire?. Also I believe that i only have to use #6 for the gas bond and also #6 for the ground rods. We are still on the 2005 code here in CT

TIA for any clarification.
Scott
 
You have a few options. Look at Table 250.66 for the water main conductor size. You can run one to each service disconnect or you can size one large wire to the water main and then split bolt to each panel.

Sprinklers are not suppose to be grounded and the gas pipe can be based on 250.104(B). The ground rod based on art. 250.66(A)
 
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