Ground test well

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anbm

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Designer
Is ground test well really needed? Can ground resistance be measured at the ground bar or ground rod instead?
I walked different sites, some buildings I do see ground test well and some do not have one.
 
Not by the NEC. Test well shows location of GR. Most I have seen are CAD weld connections. Perhaps the intent was to allow disconnecting the GEC for testing. Others may know.
 
I agree with infinity, they are installed per boiler plate spec. We used on traffic signal services to locate ground rods for ug work nearby
 
tom baker said:
I agree with infinity, they are installed per boiler plate spec. We used on traffic signal services to locate ground rods for ug work nearby
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The last big project where we installed them was a huge apartment complex. No one tested them when the building was constructed and I can assure you that no one will ever go back and test anything. And with good reason, testing would be a waste of time and money. :rolleyes:
 
infinity said:
The last big project where we installed them was a huge apartment complex. No one tested them when the building was constructed and I can assure you that no one will ever go back and test anything. And with good reason, testing would be a waste of time and money. :rolleyes:
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Where does it connect to? counterpoise?
 
anbm said:
Then why can they not measure ground resistance at the ground rod where rod portion exposed above the ground?
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The test wells are in the floor of the basement. The rods are below the concrete floor.
 
Like Rob, out of many test wells I installed, I would say not one was ever used
 
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