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#14944 10/04/02 12:18 PM
Joined: Oct 2002
Posts: 1
J
joe C Offline OP
Junior Member
Is there a general rule of thumb on how far from a building ground rods should be installed in order not to hit the footings or drain tile?

#14945 10/04/02 07:48 PM
Joined: Feb 2002
Posts: 2,233
H
Member
is there a print for the house? On the blueprint, it should show how far the foundation goes out. As for drains, they can always appear anywhere. If this is a new job, as the GC in charge of the job. If it is an old home, look for any pipes leaving the house near where you want to install ground rods, look for cable TV wires, Telco wires, gas lines, etc. and cross your fingers. [Linked Image]

#14946 10/05/02 04:36 AM
Joined: Nov 2000
Posts: 2,236
Likes: 1
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Common practice for me is to be at least 30" from the drip edge of the building, to ensure a wet area for better continuity to ground.

Plus there's something like a 30" radius around the rod that is it's "effective area", so to speak, and I'm under the impression that the code change in 2002 for the 18" burial depth of a horizontal rod to 30" falls under the same line of thinking.

I really need to get Soare's Book on Grounding...


-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI
#14947 10/05/02 07:54 AM
Joined: Jan 2002
Posts: 1,457
E
Member
But aren't we supposed to be below the moisture level? [Linked Image]


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