CEE accessibility

N

nizak

Senior Member
Got a job where the CEE comes up through the poured wall and ends up in a finished wall.

Short of providing a wall access for the clamp is there an approved way to lengthen the protruding re bar stub?

I’m finding mechanical couplers for rebar . Would using one of those also require accessibility to the set screws that hold it in place?

Welding a piece if rebar to it?????

Thanks
 
Good question. If the rebar can be tie wired together in the footing can another section just be tie wired to it?
 
infinity said:
Good question. If the rebar can be tie wired together in the footing can another section just be tie wired to it?
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@infinity I would assume the Same thing , but technically the stub out of the foundation is not the actual CEE , much like the interior portion of the metal underground water pipe is not the actual electrode its simply our connection point which extends our gec connection to the actual electrode as long as we connect within 5’, and rebar coming through the foundation simply extends the connection of our gec to the actual electrode as well , if you look at 250.68(c)(3), to me it doesn’t seem like clearly addresses this one way or the other, I don’t see anything prohibiting it , but 🤷‍♂️ what are your thoughts?
 
nizak said:
Got a job where the CEE comes up through the poured wall and ends up in a finished wall.

Short of providing a wall access for the clamp is there an approved way to lengthen the protruding re bar stub?

I’m finding mechanical couplers for rebar . Would using one of those also require accessibility to the set screws that hold it in place?

Welding a piece if rebar to it?????

Thanks
Click to expand...
Exothermic weld would be the way I’d go about this if I had to that way it wouldn’t need to be accessible,
What’s the reason for extending it if you don’t mind me asking? You can always just leave a small access point in the finished wall if you make a mechanical connection is the contractor against that ?
 

Jaybone812 said:
Exothermic weld would be the way I’d go about this if I had to that way it wouldn’t need to be accessible,
What’s the reason for extending it if you don’t mind me asking? You can always just leave a small access point in the finished wall if you make a mechanical connection is the contractor against that ?
Click to expand...
An access point isn’t an option.
For aesthetics the GC does not want a blank plate . The wall it would be on is an accent wall being finished with ship lap.
 
Jaybone812 said:
I would assume the Same thing , but technically the stub out of the foundation is not the actual CEE
Click to expand...
Since the stub is not part of the electrode it cannot be extended by any means. The stub needs to be continuous and connected to the actual electrode. If it needs to be extended then a small portion of the concrete would need to be removed and patched with the connection being made within the concrete.

250.68(C)
(3) A rebar-type concrete-encased electrode installed in accordance with 250.52(A)(3) with an additional rebar section extended from its location within the concrete foundation or footing to an accessible location that is not subject to corrosion shall be permitted for connection of grounding electrode conductors and bonding jumpers in accordance with the following:
a. The additional rebar section shall be continuous with the grounding electrode rebar or shall be connected to the grounding electrode rebar and connected together by the usual steel tie wires, exothermic welding, welding, or other effective means.
b. The rebar extension shall not be exposed to contact with the earth without corrosion protection.
c. Rebar shall not be used as a conductor to interconnect the electrodes of grounding electrode systems.
Click to expand...
 
infinity said:
Since the stub is not part of the electrode it cannot be extended by any means. The stub needs to be continuous and connected to the actual electrode. If it needs to be extended then a small portion of the concrete would need to be removed and patched with the connection being made within the concrete.
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Would a exothermic weld, or even a properly done MIG weld not make it "continuous." It's certainly one piece from a metallurgical point of view.


SceneryDriver
 
There is really no language in that section that would permit welding to extend the stub up but it should be permitted.
 
infinity said:
There is really no language in that section that would permit welding to extend the stub up but it should be permitted.
Click to expand...
I don't see any language prohibiting an extension.
Except maybe requiring the junction to be encased in concrete.
 
I
nizak said:
An access point isn’t an option.
For aesthetics the GC does not want a blank plate . The wall it would be on is an accent wall being finished with ship lap.
Click to expand...
I see , well then if it was me id just use a exothermic weld to connect my gec to the rebar stub up at the current location it’s in now , the exothermic weld connection is not required to be accessible so no need to extend the rebar
 
infinity said:
That what I mentioned in post 6 the connection would need to be within the concrete.
Click to expand...
I see nothing in the text in post #6 that explicitly states that a welded connection for an extension needs to be concrete encased.


SceneryDriver
 
infinity said:
Since the stub is not part of the electrode it cannot be extended by any means. The stub needs to be continuous and connected to the actual electrode. If it needs to be extended then a small portion of the concrete would need to be removed and patched with the connection being made within the concrete.
Click to expand...
That makes sense , and if I was in this position I’d just use a exothermic weld to connect my gec to the rebar stub up at its current location and be done with it , it’s not a mechanical connection therefore not required to be accessible!
 
SceneryDriver said:
I see nothing in the text in post #6 that explicitly states that a welded connection for an extension needs to be concrete encased.


SceneryDriver
Click to expand...
No there isn't any that says that directly but it does say that the stub need to be connected within the footing so basically that's the same thing. You cannot extend the stub once it leaves the footing.
 
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