Underground electric & up thru the slab

[sammm]

I've been doing a lot of reading and trying to plan the electrical to my new outbuilding. It will be detached and I plan to have a sub-panel run from the main house panel (200amp service there).

I will bury it in an 18" trench and use PVC (the gray stuff). My question is when the PVC comes up inside the new building (using a sweep) I've read it needs to be at least 1/4" away from the bottom plate of the wall.

How is it then protected and/or walled over? Is it typical to build a bulk head of some sort to bump out that section?

 

[Aceman]

I'm not sure I totally understand your question.

I would stub it up so it'll be centered inside one of the stub cavities. This way it'll line up with the knockout hole in the panel.

 

[sammm]

Thanks Aceman....that makes much more sense. I must have misread something. Maybe it said to stay 1/4" away from the outside wall when coming up thru the bottom plate?

 

[ddawg16]

I would concure with Ace as well.....otherwise I don't see any easy way of getting it up there.

My PVC conduit does just that...more or less centered in the stud cavity....inspector didn't say a thing.

Ace....one question....When I did my PVC...I ran it all the way up into the bottom of the panel....I assume that is the way is is supposed to be? In other words, no exposed wires until it gets inside the panel?

On a side note....I would suspect that the 1/4" rule is to help prevent a tow nailed nail from going into the conduit.

 

[Aceman]

Thanks Aceman....that makes much more sense. I must have misread something. Maybe it said to stay 1/4" away from the outside wall when coming up thru the bottom plate?

Just make sure to install nailplates on both sides so you don't hit it with a sheeting fastener.

Ace....one question....When I did my PVC...I ran it all the way up into the bottom of the panel....I assume that is the way is is supposed to be? In other words, no exposed wires until it gets inside the panel?

On a side note....I would suspect that the 1/4" rule is to help prevent a tow nailed nail from going into the conduit.

Perfect.

 

[nate379]

I wasn't thinking when I put my shed pad in and I put the conduit in a position that I have to use LBs on the side of the building.

I could retrench and fix, but lot of work at this point. Trench is about 40" down from the top soil and there is another foot of compacted road base on top of that where the shed is going.