metal receptacle box where both sides are open

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Old 01-27-18, 02:22 PM
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metal receptacle box where both sides are open

hello everyone,

Do they make metal receptacle boxes where both sides are open so that you can install receptacles on both sides. Of course, the question then is how is the box going to be attached. The box itself will be attach to emt conduit and side brackets.

A standard metal receptacle box with one side to install receptacles looks like this:

If they don't make them, maybe I can put two of those metal receptacle boxes back to back.
 
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Old 01-27-18, 02:48 PM
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You could try and see if two boxes will work out back to back with opened knock out holes lining up. Or get "extension rings" which are normally fastened to the "fronts" of regular boxes to provide more room inside for wires. These rings have threadedscrew holes on the "front" for the cover and/or devices, and tabs on the "back" which you could use to bolt two together back to back. Remember that the "front" rims of the boxes have to be within 1/4" of the finished surfaces of the walls on both sides of the stud bay and also there may not be a gap between the "rears" of the boxes across which wires may travel between knockouts.

They also make plastic "boxes"with both sides ("front" and "back") open for use with low voltage wiring. But only one side has holes for mounting screws of the devices.
 
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Old 01-27-18, 03:08 PM
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Why???????????????????????????
 
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Old 01-27-18, 04:40 PM
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Why is a good question. People will be working on both sides so much easier to plug into it on your side instead of having to go around a lot. This box will be located over a wall that is 5 feet high and people working on both sides
 
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Old 01-27-18, 04:49 PM
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Two low voltage rings cannot be used for power wiring.

You could use two 1900 boxes with brackets back to back. These are commonly available.
 
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Old 01-27-18, 08:04 PM
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We do back to back boxes all the time in commercial. As PCboss posted, two 1 1/2" 1900 (4" x 4") boxes connected together with a chase nipple works well. To attach the boxes you can either use boxes with a bracket, or install a box to stud bracket such as a B-line BB4-23. Of course proper depth mud rings are also required.
 
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Old 01-27-18, 09:22 PM
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By mud ring do you mean they extend the depth of the box out. How much of an extension do I need?
 
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Old 01-27-18, 09:44 PM
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The depth of the ring depends on the surface finish.
 
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Old 01-28-18, 06:17 AM
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Normally I use 2 -1900 boxes, 2 of the BB4-23 brackets, and 2 3/4" mudrings in commercial jobs. Commercial uses 3 5/8" studs and 5/8"" drywall. You will need to adjust from there for your studs and drywall.
 
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Old 01-28-18, 06:18 PM
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Oh, I should have cleared something up. This is to be installed on top of a center wall not inside the wall. The wall is only 59" high so people can work on both sides and talk to each other. The finished surface will be the box itself.
 
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Old 01-28-18, 06:45 PM
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The answer is the same. Two 4" boxes, back to back, each with a coverplate and receptacles. Can be screwed down to the top of the center wall.

Like this, back-to-back.
 
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