Ground rod inside building?

[Innovate1]

I plan to put my garage panel on an inside wall. Just wondering if putting ground rods inside is a reasonable thing to do. I have a section of interior wall that would allow the two rods to be spaced the required distance. Not sure if I also need to tie to the foundation rebar as well. Do I need to put an access panel to be able to inspect the connections? The ground under the building may be drier than outside so the ground may be poor. It's not that far to the edge of the building - about 12' - so putting them outside isn't a big deal. I have about a 50' between buildings and was planning to run conduit even though MHF can be direct buried. I suppose I could just run conduit until I get outside the foundations.

 

[BillK]

Not sure if I also need to tie to the foundation rebar as well.

I might be wrong but actually that is all you need to do. I am pretty sure if you use the rebar for ground you do not need any other ground wires. Just make sure that the connection to the rebar is done properly.

 

[TRWham]

Rods really need moisture to be most effective. The Ufer was developed to provide grounding in dry environments using the chemistry of concrete to improve conductivity of the nearby soil.

Is the building already constructed?

 

[Innovate1]

Not constructed yet.

 

[TRWham]

Then just install a proper Ufer system and bring the GEC up where your panel will be. I think most AHJs will accept an Ufer without supplemental electrodes, but you might want to verify that for your location.

 

[wyliesdiesels]

I might be wrong but actually that is all you need to do. I am pretty sure if you use the rebar for ground you do not need any other ground wires. Just make sure that the connection to the rebar is done properly.

This statement adds confusion here.

An EGC/ground wire from the main or subpanel feeding the detached structure is still required

What is not required with a UFER is ground rods

Not constructed yet.

Then do a UFER electrode and be done with it. No rods required.

 

[wyliesdiesels]

Then just install a proper Ufer system and bring the GEC up where your panel will be. I think most AHJs will accept an Ufer without supplemental electrodes, but you might want to verify that for your location.

They would have to unless there are local WRITTEN amendments.

 

[Jkcolo22]

Yes, insure that ufer is part of your construction permit. In many jurisdictions ufer is not a required inspection for a detached structure if the contractor is not pulling an electrical permit (no requirement for a non-living space to have electrical). So make sure it’s in your contract if you are hiring out the construction, but doing the electrical yourself or hiring out your own sub.


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[TRWham]

They would have to unless there are local WRITTEN amendments.

Just trying to be thorough. I have never run into an issue with an Ufer, but I have not worked in every jurisdiction in the nation.