Best conduit for true 2x4 wall


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Old 07-28-14, 09:51 PM
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Best conduit for true 2x4 wall

I am running a sub-panel out to a detached garage, 60 amp sub-panel using #4 xhhw-2. Part of the house sits on ledge rock, I will be running 1" PVC between the house and the garage. To get to where the run exists the house I have to make two ~30' runs through true 2x4 walls. Any suggestions on conduit types and tips for installing. I was thinking Liquidtite flexible conduit as:

Southwire Liquidtite 1 in. X 100 ft. Ultratite Non-Metallic Conduit-55094401 at The Home Depot
 
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Old 07-29-14, 03:23 AM
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Can you not run conduit up a wall cavity to an attic, then over to an exit point? Running conduit through a wall is very difficult, and will weaken the studs along the wall if not done dead center. Than the problem of actually placing the conduit in the holes. It doesn't bend very well. Liquidtite will bend sufficiently, but it is pretty expensive. Does your locality require conduit on interior walls? Can you run cable through the walls, then conduit once it exits?
 
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Old 07-29-14, 07:09 AM
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To get to where the run exists the house I have to make two ~30' runs through true 2x4 walls. Any suggestions on conduit types and tips for installing. I was thinking Liquidtite flexible conduit as:
One option could be to use ENT conduit (PVC Electrical Nonmetallic Tubing) to where you'll be exiting the building, it cannot be used outside though.
 
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Old 07-29-14, 07:16 AM
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You might be able to flex PVC conduit into the studs. The holes are going to need to line up very closely.
 
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Old 07-29-14, 11:56 AM
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I do not have an attic so that is not an option. I was under the impression xhhw always had to be in conduit, even in the wall, is this incorrect?
 
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Old 07-29-14, 12:22 PM
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Individual conductors need to be in conduit.
 
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Old 07-29-14, 12:24 PM
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Thank yo pcboss for confirming. Any products that maybe cheaper or easier to work with than liquidtite?
 
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Old 07-29-14, 12:28 PM
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I would look at PVC conduit.
 
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Old 07-29-14, 04:06 PM
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I actually think I maybe able to go under the house. The house is on pillars that range from 6" to about 2' and currently this space under the house is open. Within the next year this area will be converted into a crawl space. Any thoughts on running PVC diagonally across the bottom of the floor joists to where the PVC will be run underground?

Also since the house is elevated and its easy to get to the sill plate. Is there any reason not to just go through the sill plate, up the wall cavity into the bottom of the panel?
 
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Old 07-29-14, 04:43 PM
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Diagonal is not an issue as long as the conduit is properly secured.

I don't see an issue going into the wall cavity.
 
 

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