PVC Conduit in basement

[ivsenroute]

I am seeing more and more unfinished basement with PVC conduit running down the cinder or concrete walls with NM cable visible entering at the top to feed down to a metal box mounted on the wall and the NM cable covering is visible where it enters the box.

I always thought that there has to be a transition at the top of the PVC where the NM enters and then at the box there is no place for the NM to be "connected" to the box with a strain relief or internal clamp.

Now that I read the NEC, I don't see where this is a problem.

How do you see it?

 

[charlie]

Now that I read the NEC, I don't see where this is a problem.

334.15(C) In Unfinished Basements and Crawl Spaces. . . NM cable installed on the wall of an unfinished basement shall be permitted to be installed in a listed conduit or tubing or shall be protected in accordance with 300.4. Conduit or tubing shall be provided with a suitable insulating bushing or adapter at the point the cable enters the raceway. . .

Sorry, you are required to have something to protect the cable. Also, read the rest of this section. :grin:

 

[ivsenroute]

Yes, I was aware of the bushing where it enters but I am more concerned about the fact that there is no way to attach where it enters the receptacle box. But then again a strain relief bushing was never needed for individual wires in conduit anyway.

 

[peter d]

But then again a strain relief bushing was never needed for individual wires in conduit anyway.

Exactly...

 

[C3PO]

I run PVC down block walls into PVC FS boxes all the time here with no bushings at the top. Why would you need a bushing to protect NM cable from PVC conduit? I could see protecting it from EMT or something with sharp edges. (Just my stupid opinion.)

 

[peter d]

Why would you need a bushing to protect NM cable from PVC conduit?

Because the code requires it.

 

[C3PO]

Because the code requires it.

It is not enforced that way here with PVC anyway.
What do you all do in this situation?

 

[peter d]

It is not enforced that way here with PVC anyway.
What do you all do in this situation?

I don't use PVC for wall receptacles in a basement, but if i did I would use a TA with a plastic bushing on it.

 

[Dennis Alwon]

It is not enforced that way here with PVC anyway.
What do you all do in this situation?

We just put a pvc coupling on the top. You could use a connector with a bushing but a coupling is rounded and smooth that it is accepted here.

 

[stickboy1375]

I just shoot a 2x4 on the wall, why worry about all those parts...:grin:

 

[mdshunk]

Chapter 9, note 2. "sleeving for protection".

 

[peter d]

I just shoot a 2x4 on the wall, why worry about all those parts...:grin:

But then the NM cable will be subject to damage.

 

[stickboy1375]

But then the NM cable will be subject to damage.

Thats an old wives tale.

 

[iwire]

But then the NM cable will be subject to damage.

Only if he shoots it with the ramset.

 

[peter d]

Only if he shoots it with the ramset.

Or decides to do some target practice or hangs a dart board on the wall.

 

[1793]

Thats an old wives tale.

Sure it is. We have had a discussion on this at least once before. It appears to be up to the AHJ.

 

[stickboy1375]

Only if he shoots it with the ramset.

I generally staple the wire after the board is installed... :grin: