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#39542 - 06/24/04 03:49 PM grounding two meter service
richard Offline

Registered: 08/07/03
Posts: 84
Loc: L.I. New York
I installed a two meter service, one feeds a two pole 40, and the other was an upgrade from 100 to 150. I ran a #4 to the water main and used it for the 150 panel. I reused the #6 for the 40 amp panel. I installed two ground rods, one for each panel, seperate from each other. The boss said I was supposed to bond all the grounds together, by running just the #4 from the 150 to the water main, and bug a #6 from the 40 to it, as well as running both ground rod wires to one ground rod. Is there a code that is specific to this situation. (I live on Long Island, Suffolk County, New York. I don't see anything in LIPA"S redbook.

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#39543 - 06/24/04 04:07 PM Re: grounding two meter service
trekkie76 Offline

Registered: 06/19/04
Posts: 219
Loc: baileyville, maine, usa
in 250-50, if available on the premises, each item 1-6, shall be bonded together to form the grounding electrode system.
1. metal underground water pipe
2.metal frame of a building
3.concrete encased electrode
4.ground ring
5.rod or made electrode
6.plate electrodes

#39544 - 06/25/04 04:20 AM Re: grounding two meter service
velect Offline

Registered: 05/01/04
Posts: 79
Loc: st joseph mi usa
I did a similar service

I ran #6 from one panel to the other and then out to two ground rods 6 foot apart. One continuous ground going right through one of the neutral bar lug and through both clamps on the groumd rods. Then took a #4 bond wire and bonded the water and gas system out of one of the panels.

Passed with no problems

#39545 - 06/25/04 11:55 AM Re: grounding two meter service
SJT Offline

Registered: 07/24/02
Posts: 242
What size is the service conductors that feed the 2 gang meter (double meter). You base the size of the ground wire back to the water pipe on 250.66. From that, I would bug off to each panel, and not jump from one Bus to the other.

#39546 - 06/25/04 04:34 PM Re: grounding two meter service
Webmaster Offline


Registered: 10/07/00
Posts: 3142
Loc: NY, USA
I guess I didn't look hard enough in the redbook.

- richard


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