Electrical box issue

[four_gear]

Hi Everyone, new to the forum and have a question about a shop that I am building.

I had an electrician come out and wire the shop. upon doing so he decided to use surface mount boxes. I wanted to recess them in the wall and he assured me there would be no problem...now I have a problem.

The shop is a 48x40 pole shed. and the inside has been strapped and spray foamed. All the wiring is now buried under the foam. The inside walls will be finished in tin. How do I finish this off and have it look half decent. I am able to mount the surface mount box flush with the strapping and I am able to cut a square hole in the tin to accommodate it, the issue is I have no way of putting a j trim around it or anything and quite frankly looks like ****. I am also worried about the sharp tin edge not being covered. Here are some pics.

 

[Aceman]

If you wanted the clean look with the boxes recessed, the boxes should of been laid out to land on the flats of the tin rather than where the raised ribs were. Then it's a simple flat or 1/4" mud ring with the device installed and a nylon cover to cover the gap between the box and the tin.

This is the responsibility of both the person doing the building and the electrician. If this wasn't mentioned or brought up in the beginning, then some compromises are going to have to be made at this point.

 

[Mustang51js]

Change the covers to mud rings and then you can use a normal oversized cover

 

[four_gear]

The electrician left extra wire so I can move the box to be between the ribs. The pic I put up was just an experiment I did.

 

[kd3pc]

mud ring of appropriate depth to push the device out to where a goof plate or device cover will look OK.

 

[four_gear]

What is the purpose of a mud ring?

 

[four_gear]

I am toying with the idea of just surface mounting the boxes. Might be less hassle in the end and might look better anyways.

 

[Beemer533]

What is the purpose of a mud ring?

A mud ring will allow the use of standard wall plates so you can cover the cut edges of the metal.

 

[Dagny]

Steel lined shed I would insist on thinwall conduit on the outside with raised covers. Just works out better.

 

[Charles (in GA)]

Mud rings come in at least three different depths, ¼, 3/8, ½ inches deep. Set the boxes so that the mud rings outer most surface is flush to about .040" proud of the surface, install the receptacles, then install faceplates, nylon ones work best as they won't crack and split. You can get oversize ones if needed to cover gross errors in the cutting of the metal. The boxes will have to fall centered in the flat between the ribs.

Charles

 

[checkthisout]

Put between ribs. Cover with nylon plate. Caulk around plate to fill in slight gap between ribs.

You can use remodel boxes and just fix them to the tin as well. Cut tin with cutoff wheel after installed. Just make sure the wire will reach the desired location.

A single gang box centered between the high ribs would look best. The edges of the cover plate would then rest on two lower ribs.