LB concealed in a wall?

[billconner]

I'm probably not understanding but you can't just get a conduit - even metal flex - out of existing panel into new panel? It seems like some combination of bends would get you from side of recessed panel to back surface panel/trough.

 

[drps10]

Where is the trough?

You can't bury an LB. Period.

Looks like you are adding a sub panel below the panel. Use a ****** (and bushings) to connect the two, mount the lower one flush and repair your drywall. When you put the covers back on it will be a clean install.

this is someone else's picture. I have not started the project, but trying to figure out my best route.

What ****** and bushing do you speak of and how to accomplish it? I am trying to avoid running EMT from bottom of flush mount, out of the drywall and into a surface mount wire trough.

Trying to avoid something like this

 

[PCustoms]

this is someone else's picture. I have not started the project, but trying to figure out my best route.

What ****** and bushing do you speak of and how to accomplish it? I am trying to avoid running EMT from bottom of flush mount, out of the drywall and into a surface mount wire trough.

Trying to avoid something like this

Please provide some photos of what you're trying to do. Using other people's pictures of different setups is going to confuse everyone.

 

[billconner]

Come out of bottom of panel and into back of trough with conduit.

 

[drps10]

working with paint, this is what I could come up with.

I have a flush mount panel and I want to mount a surface mount trough below the panel. How do I run conduit from panel to trough? I am trying to avoid where I have to have a S bend poking through drywall into the top or side of the trough! I am trying to avoid what the second picture is.

I can't see how I using an LB in this instance isn't allowed. It's not being used a pull location, but as a tight 90* turn. Would be no different if I could make a sharp turn in the cavity from EMT or something else, but I can't.

 

[drps10]

Come out of bottom of panel and into back of trough with conduit.

This is my intent!! But required to have conduit connect the two together is my challenge. Running THHN as a feeder is required to be in conduit the entire way, regardless if in a wall cavity or exterior of a wall. I would love to be able to make a tight 90* turn into the back of the trough.

My other thought is buy a smaller trough to recess into the wall cavity, leave the face plate off and cut a hole to match recessed in new trough.

Maybe like I just drew up? The main panel is recessed into the wall and trying to mate to a surface mount trough.

 

[sparky 1971]

working with paint, this is what I could come up with.

I have a flush mount panel and I want to mount a surface mount trough below the panel. How do I run conduit from panel to trough? I am trying to avoid where I have to have a S bend poking through drywall into the top or side of the trough! I am trying to avoid what the second picture is.

I can't see how I using an LB in this instance isn't allowed. It's not being used a pull location, but as a tight 90* turn. Would be no different if I could make a sharp turn in the cavity from EMT or something else, but I can't.

The LB is a pulling point whether or not you care to believe it and the cover has to remain accessible. Code reference 300.15(A). Why not recess an 8X8X8 or 12X12X8 junction box in to the wall, leaving about 4" of box sticking out for a ****** to go into the side of the trough? Or just use the deep box instead of a trough. You could also use a 6" deep box, but that won't leave much to work with on the outside.

 

[billconner]

This is my intent!! But required to have conduit connect the two together is my challenge. Running THHN as a feeder is required to be in conduit the entire way, regardless if in a wall cavity or exterior of a wall. I would love to be able to make a tight 90* turn into the back of the trough.

My other thought is buy a smaller trough to recess into the wall cavity, leave the face plate off and cut a hole to match recessed in new trough.

Maybe like I just drew up? The main panel is recessed into the wall and trying to mate to a surface mount trough.

Flex will make that bend. And if you had to do smaller ones, would it matter?

 

[billconner]

Or recessed box, a bit shorter than height of gutter, and do a cut out in trough about same size as box.

 

[sparky 1971]

Flex will make that bend. And if you had to do smaller ones, would it matter?

He want's to install #8's so it would be a minimum of 3/4 FMC. It won't make that bend, especially if it's a 2X4 wall. It would be tough with a 2X6

 

[dave*99]

Here is an idea - not complete so please offer helpful suggestions....

Mount a deep 4x4 box directly under main panel. Use one with large KOs
Connect 4x4 to main panel with rigid conduit
4x4 box should be flush with drywall.

Cut a 4x4 hole in the back of your trough.
Surface mount the trough directly over the 4x4.
Find a method to attach the 4x4 to the back of the trough.
Maybe use the corner screws of the 4x4
Don't leave any sharp edges on the trough to cut wires.

Or remove the long screws from this
Raco Retro Ring and use it to clamp the 4x4 to the back of the trough





Another approach is to start with a flush 4x4 in the wall. Connected with rigid conduit.
Add 1 or 2 box extensions so it protrudes from the wall.
Surface mount trough on drywall. Below or next to the protruding box extension.
Connect box extension to trough with ******.

 

[Norcal]

Use a 4X4X4 screw cover can enter from the back of the box & exit through the top, all issues about concealing a cover go away.

 

[drps10]

Thanks for the suggestions. I have 2 ideas, one like drawing 1 where I sink another box in the wall and cut out the back of the trough or drawing 2 sink a really deep trough in the wall that would stick out to mate flush with my bigger trough (10" sunk into wall cavity).

Coming out of the panel to both inverters will be #4 L1, N, G and from inverters will be #4 to panel 1 L1, L2, N,G and same into panel 2. Along with 2/0 from battery to bus bar (not pictured). And also need to put romex wire from main panel to load panels too. So a wired trough it the best option to run and hide all the wires. PV wire needs to be in EMT, so I am just making it uniform and running all EMT even though AC wiring does not specifically need EMT