*sigh* another detached garage question :(

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SeanB said:
I pulled up some plumbing pipe that was laid years ago (thanks a lot local contractors) that was supposed to be my conduit for electrical. It was 2" underground :eek:

anyway that conduit was completely dry. .
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Plumbing pipe is designed to hold water in. Electrical conduit is not, the joints are not pressure rated. The wiring method inside must be listed for a wet location. I used to have water maintenance personel help me lay conduit and they always wanted to use primer. Plus electrical couplings are not tapered inside and water are.
 
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Underground Conduit - wet location

Underground Conduit - wet location

The ventillation system in your house can create a positive or negative pressure in your basement, relative to your garage. Draw warm, moist air on a summer day through and underground conduit, and it becomes a wet location.
 
Once again, a conduit's interior is not a location. If a conduit is in a wet location, so are the conductors within.
 
Ok, so should I use a 6/3 UFB? That would statisfy the "wet location" problem right?

The reason I do not want to run thwn single conductors is to get away from having to run conduit all the way to basement panel. There is a lot of clutter already in the way. is there a sheathed 6/3 THWN? (so I can run along floor joyces)
 
PS Another question: I havent used expansion joints before, South texas didn't seem to need them. Here in New England it is common (Frost heaves underground??).

I have a Carlon PVC schedule 40 expansion joint. When you pull it apart, it reads "midway point". Are these to be installed in the midway point level, when attached? Are these to be installed underground or at grade level? Never worked in these kinds of soil conditions before.

Thanks again
 
SeanB said:
The reason I do not want to run thwn single conductors is to get away from having to run conduit all the way to basement panel.
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So terminate the conduit run at a junction box, and splice to the NM there.
 
SeanB said:
I have a Carlon PVC schedule 40 expansion joint. When you pull it apart, it reads "midway point". Are these to be installed in the midway point level, when attached? Are these to be installed underground or at grade level?
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You'd cut the conduit so you line up the midway point if the temperatures are moderate when you install them. Compensate a small amount if the temperature is near either extreme. Also, if you know which way settling might cause permanent movement, comnpensate for that.

Don't these things come with instructions?
 
There were no instructions with the expansion joint :confused:

Wireman, I just relocated here and am about to mail my check off for a license (just passed exam), THEN I can get some work with someone more experienced in this region. I know i'm a nooby and that bothers you, but I cannot get to work here without a license. I have never seen an expansion joint before. I have worked in Hospital construction, schools, football stadiums and mostly commercial stuff, a little residential. Perhaps I should get with a good residential electrical company here.

Anyway thanks for the input. The Job is Done and it's inspected.
 
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