GROUNDING

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rbarbrey

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I have two warehouses on elevated slabs (App.4 feet) above grade. My drawings show intallation of ground rings at both buildings. May I use any of the grounding methods in the code book or am I bound to drawings? The ground ring consist of a ground rod every 15 feet.
 
Re: GROUNDING

Originally posted by rbarbrey:
I have two warehouses on elevated slabs (App.4 feet) above grade. My drawings show installation of ground rings at both buildings. May I use any of the grounding methods in the code book or am I bound to drawings? The ground ring consist of a ground rod every 15 feet.
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Why not install fewer lights and receptacles than shown on the plans as well?
 
Re: GROUNDING

If contractually you have drawings given to you, then you must follow them.
If you are not bound by contract drawings, then you COULD just comply with minimum code.
 
Re: GROUNDING

Originally posted by rbarbrey:
because lighting and receptacles are not the problem
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:D

Fair enough.

But do you get what I was trying to point
out?

I assume you bid on a set of drawings and they accepted your bid with the understanding you would provide what was shown.

We sometimes ask for a change and the customer may approve the change but will expect a credit from us for doing less than what was shown.

If this job was engineered I doubt the engineer will think highly of a reduction of the grounding electrode system.

Good luck.

[ January 05, 2006, 06:59 AM: Message edited by: iwire ]
 
Re: GROUNDING

Originally posted by ron:
Very often we get kickbacks from the ground rod folks, that's why we specify so many. ;)
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AHA, I knew it!!!! ;)

Roger
 
Re: GROUNDING

Ron, how could you! Don't you know what the Engineering Code of Ethics says about "kickbacks"? It says we don't tell anyone about them! :D
 
Re: GROUNDING

The ground ring consist of a ground rod every 15 feet.
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First of all that is not what a ground ring consists of, ground rings shall consits of of at least 20' of #2 or larger bare copper wire, the ring shall encircle the entire building and be buried in a trench at least 2 1/2' in depth, I would submit a change order.
 
Re: GROUNDING

jhr how do you know that it is not a NEC compliant ground ring with rods attached every 15'?

You should see the ground rings we install per spec.

A 4/0 bare encircling the building with dozens of cad welded taps to building steel and concrete encased electrodes, add some ground rods and a few hand holes to access the ring for testing purposes in the future.

If its on the plans bid, do it and make some more money. :cool:

[ January 05, 2006, 06:21 PM: Message edited by: iwire ]
 
Re: GROUNDING

jhr how do you know that it is not a NEC compliant ground ring with rods attached every 15'?
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He never mentioned how each G-rod would be bonded. I would say the G-rods would be overkill, but if the bucks are green and going in the old wallet, I agree what ever the man wants,do, I was just going by the NEC minimum. :cool: :cool:
 
Re: GROUNDING

Originally posted by iwire:
A 4/0 bare encircling the building with dozens of cad welded taps to building steel and concrete encased electrodes, add some ground rods and a few hand holes to access the ring for testing purposes in the future.
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Except that we used tinned #2 solid copper, that sounds almost exactly like the grounding work we did for a cellular tower.
 
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