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Mounting my breaker panel for the final time

blair683

Well-known member
Joined
Feb 21, 2017
Messages
460
Location
Ohio
I am trying to figure out how I should mount my breaker panel in my pole building permanently. Right now I have it screwed right to the girts that are attached to the outside of the posts (see pictures). I am eventually going to run 2"x4"s horizontally between my posts on 24" centers for insulation. I will then osb on top of that. I am thinking I should go ahead and run the 2"x4"s on that portion of the wall (I have the materials already). Then attached my breaker panel to the 2"x4"s.

I am kind of worried that the panel will then stick out to far. But I don't want to have the breaker panel built into the wall once its finally finished. I would rather have full access to add to or modify my wiring in the future.

If I do it this way I planned to run a piece of 2" (or bigger) conduit from the top of my panel to above my rafter. Then run all of my outlet and light romex down through that conduit. That way once my ceiling is finished, no wires will be visible. I already have an outlet on each post with the wire running up the post to a junction box in the rafters (above the ceiling).

What is the "norm" to mounting breaker panels in a pole building? What have you people done in your buildings? Thanks for the help:)
 

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Unclebeef

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Joined
Apr 10, 2018
Messages
8
I would mount the panel so the depth is flush to whatever the interior finished surface will be. You’ll need to run thhn wire through conduit as nm-b isn’t rated for that. There are conduit fill charts online. Sounds like you already have junction boxes in the attic so you’ll make the splices up there. You could always surface mount everything in conduit then it’s always accessible, or use nm-b wire and traditionally wire like most homes.
 
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blair683

Well-known member
Joined
Feb 21, 2017
Messages
460
Location
Ohio
My panel is 4" deep. So being mounted to the outside girt (like it currently is) with the 2"x4"and 1/2" OSB that I plan on doing will make it surface mounted. So I would probably be better off leaving it surface mounted then running exposed nm-b romex (will eventually be covered up with insulation and OSB). I guess with the OSB being attached with screws, I could easily remove it to access the wires if ever needed.
 

alfredeneuman

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Joined
Mar 3, 2011
Messages
4,595
Location
Fullerton, CA
. You’ll need to run thhn wire through conduit as nm-b isn’t rated for that.

There is no NEC prohibition for NM in conduit.
It will be subject to conductor derating due to the number of current carrying conductors if it's used in lengths >24", though
 
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