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Why are my garage ceiling outlet boxes not on the edge of the ceiling joist?

Why are my garage ceiling outlet boxes not on the edge of the ceiling joist?

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  #1  
Old 01-13-17, 05:18 AM
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Why are my garage ceiling outlet boxes not on the edge of the ceiling joist?

The ceiling on my garage are exposed ceiling joists with insulation (no drywall). The original builder or previous owner wired ceiling outlets above each garage door opener. My experience is these outlet boxes would be slightly proud of the ceiling joist. Something like the example photo below.

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In my case the entire box was pushed up 2" - 3" in to the insulation.

I started to mount these "correctly" and planned to relocate the boxes to the bottom edge of the ceiling joist, but was concerned the electrician knew what he was doing when mounting the boxes that way. Maybe he did this because there was no drywall and something to do with exposed wiring?

I want to do this correctly by code. Can someone help?
 
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  #2  
Old 01-13-17, 07:33 AM
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You're right, normally they would be mounted so the front edge is 1/2 inch proud of the joist to allow for thickness of sheetrock. You can move them as long as you keep the cable 1 1/4 inch back from the front of the joists. OTOH, if you're not planning on finishing the ceiling, there is no harm in leaving them where they are.
 
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Old 01-13-17, 08:37 AM
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Many garages use 5/8" drywall for fire code.
 
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Old 01-13-17, 08:47 AM
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How did they install the cover plates with them installed like that?
Attached garage?
Kraft faced insulation?
Reason I'm asking is insulation should not be left exposed like that for several reasons.
 
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Old 01-13-17, 08:55 AM
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That wiring job in that photo screams "I don't have the correct tools or knowledge ". Drill the top plates and run the cables up in the truss.
 
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Old 01-13-17, 09:05 AM
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" My experience is these outlet boxes would be slightly proud of the ceiling joist. Something like the example photo below.
"
 
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Old 01-13-17, 09:33 AM
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I would move the boxes down and leave a 1/2" reveal.
My guess is the installer just wasn't paying attention.

If you are drywalling the ceiling, it might be easier to remove the existing boxes, leave the cable loose, and add old work boxes after the fact.
 
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Old 01-13-17, 01:09 PM
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As long as I am not violating code I am going to move the boxes down such that if I do drywall in the future they will be in the correct place.

Thank you all for the responses!
 
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Old 01-13-17, 01:14 PM
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Check codes before moving the boxes. Around here, if there's living space above the garage, we have to double rock the ceiling.
 
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Old 01-13-17, 01:30 PM
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Don't you love the stock handyman photos with glaring errors?
 
  #11  
Old 01-14-17, 04:02 AM
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Are we sure that the photo is not a photo of "what not to do" when wiring a room? It would seem to me that the room would be sheet rocked; well, I don't recall being able to sheet rock over NM. I think there may be a slight chance of a sheet rock screw going through :NO NO NO: at least one of the NM cables; (sarcasm implied).

Unfortunately someone not really knowing any better may try and follow that layout.
 
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