Recessed light concealed junction box


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Old 08-13-16, 02:36 PM
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Recessed light concealed junction box

I'm fitting a recessed light with 2.5" deep can for LED.
It has a junction box attached with a piece of EMT.
Can this junction box be buried in the ceiling?
How do you make it accessible if it needs to be accessed in future?
 
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Old 08-13-16, 03:19 PM
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How does the can attach to the ceiling? Is it a retro fit or new construction? Model and mfgr of can would help.
 
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Old 08-13-16, 04:17 PM
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Actually... it doesn't matter as all can lights can be removed for service.

With new work... the can comes out and the ring and junction box stay in the ceiling.
With old work... the entire assembly comes back out.

Your are not "burying" the box as you can gain access to it.
 
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Old 08-13-16, 07:25 PM
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I assume it's an old work then as the emt is permanently connected to the can. However, I'm trying to install in a ceiling with not much room. The can is 2.75" deep. The ceiling is filled with 2" Styrofoam + 1" strapping + 3/4" panel. Maybe an actual depth of 3.5"
I guess I will have to cut out an area of Styrofoam and fit it all in.

I suppose this must be done before putting the finishing paneling in? Or can I somehow fit the junction box, cut out the hole in wood paneling, then refit the light after?

http://www.rona.ca/en/flex4-led-recessed-light-33785310
 
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Old 08-13-16, 09:00 PM
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EMT is Electrical Metallic Tubing, a "rigid" conduit. That light fixture has flexible metallic conduit, not EMT, between the fixture and the wiring box. That fixture is held in the ceiling by the "wings" that turn outward when the screws are tightened, it is fully reversible if it is ever necessary to get to the j-box.
 
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Old 08-14-16, 05:13 AM
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But I have to fit the whole thing in the ceiling in 1 go? ie slot it through a pre cut hole in the ceiling... or can I somehow fit it in place, leave the light dangling, foot the ceiling after with a cut hole - would have to be very accurate get in the right place.

Does the flex metal detach from the can?
 
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Old 08-14-16, 05:22 AM
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Do not detach the flex from the can. Make a hole for the can, and cut the foam adjacent to it so it will accept the junction box. Wire it up and insert the junction box and light in the proper position to utilize the cut out. You should be able to reach up and do that easily. Do you have attic access?
 
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Old 08-14-16, 06:58 AM
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It's the ceiling of a ground floor entrance room that is entirely concrete so I'll be working from below it. It will leave a small area without Styrofoam insulation but not much. I can stuff in wool around it after.
 
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Old 08-14-16, 08:04 AM
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If it is concrete, don't go hog wild with insulation unless it is called for. You will want the light to have a little breathing space, and you will need space for the junction box.
 
 

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