Conduit Req.?

A

Alwayslearningelec

Senior Member
Location
NJ
Occupation
Estimator
I believe a "stub/stick" of conduit would be required when running vertical on wall but do the conductors need to be enclosed in a raceway for the entire length??

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Are you referring only to the GEC? Review 250.64(B). Securing and Protection Against Physical Damage.
If not exposed to damage it can be installed without conduit or other protection even exposed on surface. As always what constitutes "Subject to damage" is up to debate and may be at the discretion of the AHJ. (not saying it is right but lacking clear definition it is what it is.)
 
No it does not need to be in a raceway. It would be nearly impossible to damage a #3/0 or #4/0 copper conductor that is strapped to the wall. That looks like typcial overkill boiler plate stuff from the dirt worshipers. And why is there a bare conductor run in the slab?
 
I especially like Note 3. Depending on your soil conditions you might need a truck load of ground rods :)
 
augie47 said:
I especially like Note 3. Depending on your soil conditions you might need a truck load of ground rods :)
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Yup, these boiler plate guys like to waste peoples money. As if the connections to miles of rebar in the footing weren't sufficient. :rolleyes:
 
infinity said:
No it does not need to be in a raceway. It would be nearly impossible to damage a #3/0 or #4/0 copper conductor that is strapped to the wall. That looks like typcial overkill boiler plate stuff from the dirt worshipers. And why is there a bare conductor run in the slab?
Click to expand...
Looks like they are quoting 250.52(A)(3) for a CEE. But they are showing it in the slab not the footer as would be required for the UFER.
augie47 said:
I especially like Note 3. Depending on your soil conditions you might need a truck load of ground rods :)
Click to expand...
I think Mike had a video showing that trying to get even to the 25ohm limit was over 100ft of rod and still going.
 
Fred B said:
Looks like they are quoting 250.52(A)(3) for a CEE. But they are showing it in the slab not the footer as would be required for the UFER.
Click to expand...
It actually shows both connecting to the rebar and in the slab.
 
Fred B said:
Saw that, not required.
Had one person that did this in an attempt to sort of create an EP bond to the basement slab, not sure what for.
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I've seen this before in commercial buildings with poured concrete construcution where they run bare copper conductors within the slab. :unsure:
 
To the OP be careful on your bid, there are many issues with this drawing. Note 3 requires 5 ohms ground resistance, that may not be possible. The correct way is to have the soil resistiviy tested and then design the grounding array. There are other issues such as a 3/0 to ground rods when only a 6 is required
 
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