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More grounding and bonding CEE and H2O

jar546

jar546

CBO
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Oct 16, 2009
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Not where I really want to be
If you have a CEE to rebar in the footing and there is a copper water pipe that feeds the structure I have a question.....................

Do you still have to bond to the water pipe within 5' of where it enters the foundation?

Notice my choice of words....
 
jar546 said:
If you have a CEE to rebar in the footing and there is a copper water pipe that feeds the structure I have a question.....................Do you still have to bond to the water pipe within 5' of where it enters the foundation?

Notice my choice of words....
Click to expand...
Simple answer is yes.

250.50 requires all grounding electrodes that are present to be used.

If the water pipe doesn't qualify as a grounding electrode then it must still be bonded in accordance with 250.104(A).

Chris
 
I should add that if you are bonding in accordance with 250.104(A) that bond does not need to occur within 5' of the entrance of the pipe.

Chris
 
I agree with Jeff and that other Chris.

250.50 Grounding Electrode System.All grounding electrodes as described in 250.52(A)(1) through (A)(7) that are present at each building or structure served shall be bonded together to form the grounding electrode system. Where none of these grounding electrodes exist, one or more of the grounding electrodes specified in 250.52(A)(4) through (A)(8) shall be installed and used.

Exception: Concrete-encased electrodes of existing buildings or structures shall not be required to be part of the grounding electrode system where the steel reinforcing bars or rods are not accessible for use without disturbing the concrete.
Click to expand...
 
raider1 said:
I should add that if you are bonding in accordance with 250.104(A) that bond does not need to occur within 5' of the entrance of the pipe.Chris
Click to expand...
I revise to bonding on the exterior, or, within five feet of the foundation wall on the interior.

250.52 (A) (1) Metal Underground Water Pipe. . . . Interior metal water piping located more than 1.52m (5 ft.) from the point of entrance to the building shall not be used as a part of the grounding electrode system . . .
 
Jobsaver said:
I revise to bonding on the exterior, or, within five feet of the foundation wall on the interior.250.52 (A) (1) Metal Underground Water Pipe. . . . Interior metal water piping located more than 1.52m (5 ft.) from the point of entrance to the building shall not be used as a part of the grounding electrode system . . .
Click to expand...
If the water pipe is not an electrode then the bonding requirements of 250.104(A) do not require that the connection to the water piping system be within 5' of the entrance to the building.

Chris
 
Jobsaver said:
Chris. I am assuming the H2O supply meets the definition of a grounding electrode.
Click to expand...
Then 250.52(A)(1) applies. The quote that you used was my comment in regards to bonding of water piping systems that don't qualify as an electrode.

Chris
 
Most incoming water services don't qualify as an electrode... how many of you also have problems with the grounding of the low volt systems?
 
;) :D

peach said:
Most incoming water services don't qualify as an electrode... how many of you also have problems with the grounding of the low volt systems?
Click to expand...
What kind of problems are you seeing? Didn't the 08 250.94 make it idiot-proof?
 
we're not under 08 .. so no, it's not idiot-proof. Some of our projects are still under 96.
 
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