Short radius 90?

A

ammklq143

Senior Member
Location
Iowa
Occupation
Electrician
I have a customer with panel mounted in an exterior wall. It's a 4" wall and I'd like to lower the panel because the bottom is probably at least 6 ft high. It has an LB outside and stubs into the back of the panel. Is there a short radius 90 that would be able to turn inside the wall and go down into the top of the panel if I moved it down? It would likely resemble a plumbing elbow but I don't think I've ever seen anything like that for electrical use. Any suggestions other than pulling the existing LB and lowering it so he doesn't have to patch a hole in the siding? Thanks.
 
ammklq143 said:
I have a customer with panel mounted in an exterior wall. It's a 4" wall and I'd like to lower the panel because the bottom is probably at least 6 ft high. It has an LB outside and stubs into the back of the panel. Is there a short radius 90 that would be able to turn inside the wall and go down into the top of the panel if I moved it down? It would likely resemble a plumbing elbow but I don't think I've ever seen anything like that for electrical use. Any suggestions other than pulling the existing LB and lowering it so he doesn't have to patch a hole in the siding? Thanks.
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Is the entry into the top back of the enclosure?
Not so lucky as to it entering lower back, where you can just move the panel down? Dang.
 
I'd probably just use another LB but there are also 1/2" and 3/4" EMT 90 degree fittings available if the size will work.
 
There is short radius elbows out there. They are listed, some even for hazardous locations.

I don't know what NEC section allows them or if one even exists.

I wouldn't want to use one if there was much length to be pulling through it.

When I have used them was for short nipple between enclosures situations and somewhat minimal fill in the raceway. Solid conductors don't like to pull through these very well.
 
readydave8 said:
Screw cover box if existing LB impossible to lower
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There's an idea!

Replace the outside LB with a vertically-mounted trough, 4" x 4" (or 6" x 6" if needed) x long enough to reach from the nipple under the meter to past the KO you want to use into the back of the panel.

For that matter, you could use a box or a shorter trough as an extension between the nipple and the original LB. In either case, the box or trough would be able to cover the patched hole in the wall.
 
Last edited:
ptonsparky said:
A Barn Quilt covering the old exterior hole.
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I had to look that up:

Barn quilts

Barn quilts are a type of folk art found in the United States (particularly the South and Midwest) and Canada. They take the patterns of traditional quilt squares, and recreate them either directly on the side of a barn or on a piece of wood or aluminum which is then attached to the side of a barn.[27] Patterns are sometimes modeled off of family quilts, loved ones, patriotic themes, or important crops to the farm.[28] The origins of the barn quilt are contested- some claim they date back almost 300 years, but some claim they were invented by Donna Sue Groves of Adams County, Ohio in 2001.[29] Their origin is likely connected to barn advertisements. Many rural counties will display their barn quilts as part of a quilt trail, creating a route that connects barns with barn quilts to sponsor local tourism.
 
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