GEC connections accessible or not?

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edward

Senior Member
Location
CA
Occupation
Electronologist
When using the water pipe as an electrode the connection has to be within 5' of where it enters the building, does that connection has to be accessible? Or can it be buried?

I say it has to be accessible the inspector said it can be buried.
 

edward

Senior Member
Location
CA
Occupation
Electronologist
I think you meant 250.68(A)

I was always under the impression that it has to be accessible. Learned something today. :thumbsup:

It has to be accessible if it is above grade.
 

jwelectric

Senior Member
Location
North Carolina
I think I remember a debate on this site where it was not an electrode unless it entered the building.

I agree that the water pipe bond can be made underground and in some cases even requires the bond to be made underground.
 

jwelectric

Senior Member
Location
North Carolina
250.52 Grounding Electrodes.
(A) Electrodes Permitted for Grounding.
(1) Metal Underground Water Pipe. A metal underground water pipe in direct contact with the earth for 3.0 m (10 ft) or more (including any metal well casing bonded to the pipe) and electrically continuous (or made electrically continuous by bonding around insulating joints or insulating pipe) to the points of connection of the grounding electrode conductor and the bonding conductor(s) or jumper(s), if installed.


Notice that there is a big change from the ?08 code cycle in the verbiage used in this section. This change was made to clear up the confusion that the first five feet of metal water pipe that enters the building is not part of the electrode but the path that leads to the electrode.

250.68 Grounding Electrode Conductor and Bonding Jumper Connection to Grounding Electrodes.
(C) Metallic Water Pipe and Structural Metal. Grounding electrode conductors and bonding jumpers shall be permitted to be connected at the following locations and used to extend the connection to an electrode(s):
(1) Interior metal water piping located not more than 1.52 m (5 ft) from the point of entrance to the building shall be permitted to be used as a conductor to interconnect electrodes that are part of the grounding electrode system.

The mention of the first five feet was moved to 250.68(C) and the verbiage is very clear that the only part of the metal water pipe that is electrode is that part that is in contact with earth, and anything else is nothing more than an extension to that electrode.

So let?s say that just before entering the building the metal water pipe is changed to nonmetallic pipe. Is there still an electrode present and if so is it required to be used? If you answer this yes would this mean that the connection is underground?
 
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