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Old 09-25-2008, 08:38 AM   #1
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Dual meter socket wiring


Situation:
*Setting up service for new construction
*200A panel for main
*100A panel for offpeak heating
*Dual meter socket
*We have two 8' grounding rods. One on the inside of the house and one on the outside of the house.

Question set #1 - grounding:

Based on our work so far, the inspector gave the following feedback:
"Two ground rods 6' apart must have one continuous grounding electrode conductor from each panel. The best way to do this is come out of the panel loop through the clamp on each rod than up to the second panel."

Based on the feedback from the inspector and what I've read in NEC, it sounds like two grounding rods for both is sufficient. Right?

My interpretation of what he recommends is to do the following with one continuous grounding wire:
*Start at the 200A panel
*Loop through outside grounding rod
*Loop through the inside grounding rod
*End at the 100A panel

Does this sound right? Is this the best approach?

Also, can the wires going to the dual meter socket share the same (2") raceway? Based on his feedback so far, it seems like "yes".

Thanks

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Old 09-25-2008, 09:56 AM   #2
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Dual meter socket wiring


Quote:
Based on the feedback from the inspector and what I've read in NEC, it sounds like two grounding rods for both is sufficient. Right?

Yes... these are supplemental electrodes to your metal water pipe electrode if your homes service is metal plumbing.

Quote:
My interpretation of what he recommends is to do the following with one continuous grounding wire:
*Start at the 200A panel
*Loop through outside grounding rod
*Loop through the inside grounding rod
*End at the 100A pan
Does this sound right? Is this the best approach?

Its fine... there are other ways but that is what the inspector wants so give him his wishes.....

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Old 09-25-2008, 10:02 AM   #3
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Dual meter socket wiring


I should add exactly what do you have for service equipment...ie.. do the panels have main breakers or do you have a remote overcurrent disconnect(s) serving each panel?
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Old 09-25-2008, 10:36 AM   #4
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Dual meter socket wiring


Thanks for the response! Both panels have main breakers. Meter is on the other side of the wall from the panels.
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Old 09-25-2008, 12:33 PM   #5
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Dual meter socket wiring


Then you have no problems with what you have suggested for your grounding electrode conductor.
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Old 09-25-2008, 07:02 PM   #6
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Dual meter socket wiring


Quote:
Originally Posted by bdelegan View Post
Situation:
*Setting up service for new construction
*200A panel for main
*100A panel for offpeak heating
*Dual meter socket
*We have two 8' grounding rods. One on the inside of the house and one on the outside of the house.


Also, can the wires going to the dual meter socket share the same (2") raceway? Based on his feedback so far, it seems like "yes".

Thanks
I do not know why your inspector say ok but you will run into some issue due two diffrent size conductors { wires } in 2 inch conduit but 2X2 raceway IMO it is not very pratical due the room in the raceway it will be pretty crowded.

If you have to run the raceway myself I rather have 3X3 or larger the reason why I say that due the wire bending it will nail ya if not carefull.

Merci,Marc
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Old 09-25-2008, 07:11 PM   #7
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Dual meter socket wiring


Ground wire must be continuous from each panel to the first ground rod but does not have to be continuous thoughout.

You can, for example, go from 200A panel to one rod, 100A panel to the other and jumper between.

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