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Old 07-30-2013, 08:42 PM   #1
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Box Notched Over Ceiling Grid


I want my light centered in the room so it needs to be centered on one of the ceiling grids. I notched the box so it could fit over the grid and screwed the box to a nailer. Is there any reason not to do this? See pics:
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Old 07-30-2013, 09:04 PM   #2
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Box Notched Over Ceiling Grid


Because you could electrify the entire ceiling grid. How's that for a reason not to do that. Not to mention it's not allowed by code.

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Old 07-30-2013, 10:32 PM   #3
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Box Notched Over Ceiling Grid


No you can not do that. If your set on the light being there you will have to redo the grid for the light sits in a tile.

2 foot tile where the light is a one foot tile on either side of the 2 footer.

Once you get the full tile where you want use a tbar hanger for the box, unless it is an unusually heavy light.

http://www.erico.com/products/CADDYcfcTGrid.asp
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Old 07-30-2013, 10:47 PM   #4
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Box Notched Over Ceiling Grid


Quote:
Originally Posted by OhioDon View Post
I want...
Too bad.
Move the box or move the grid. Your choice.
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Old 07-30-2013, 11:07 PM   #5
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Box Notched Over Ceiling Grid


I have no problem with your solution.

You can buy metal boxes with those slots already in place.

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Old 07-31-2013, 06:09 AM   #6
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Box Notched Over Ceiling Grid


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Originally Posted by chitownken View Post
Not to mention it's not allowed by code.
Can you cite the code chapter? I would like to read this.
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Old 07-31-2013, 08:43 AM   #7
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Box Notched Over Ceiling Grid


Quote:
Originally Posted by chitownken View Post
Because you could electrify the entire ceiling grid. How's that for a reason not to do that. Not to mention it's not allowed by code.
Yes, it would not be cool to electrify the grid. Although that might be an effective security device! lol

In seriousness: is the chance of electrifying the grid any greater than using a metal box with t-bar hangers? Or, what about the can light fixtures that hang on the grid? Would that not have the same chance of a short that would electrify the grid? Not trying to argue; just trying to understand (and justify what I want to do!! )

Regarding the box with slots: it specifies "recommended for low voltage applications only".

Can anyone provide the code citation prohibiting this? This is in a bedroom and we really want the light centered that direction in the room.

Last edited by OhioDon; 07-31-2013 at 09:00 AM.
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Old 07-31-2013, 12:32 PM   #8
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Box Notched Over Ceiling Grid


Just move the grid piece over and be done with it. A couple inches will not be noticeable.
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Old 07-31-2013, 12:37 PM   #9
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Box Notched Over Ceiling Grid


The ceiling is already complete with 2' square tiles. I'm not sure what you mean; the tiles are 2' square so I can't just move one of the grids.
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Old 07-31-2013, 12:51 PM   #10
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Box Notched Over Ceiling Grid


What type of light are you using?

Maybe this would work?
http://www.lowes.com/pd_19841-53911-...ductId=3819941
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Old 07-31-2013, 12:55 PM   #11
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Box Notched Over Ceiling Grid


You have/will be modifying a UL listed item, thus voicing the listing.

You should have planned the ceiling to have a true center tile. Now you are a little stuck. As I see it you have two options...

1). Move the fixture box so the grid misses the box.

2). Cut the grid where the box needs to go. If the fixture has a large enough base/ canopy you won't notice anything. However, if that is a main runner, you may be forced to move the box.
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Old 07-31-2013, 04:05 PM   #12
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Box Notched Over Ceiling Grid


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The ceiling is already complete with 2' square tiles. I'm not sure what you mean; the tiles are 2' square so I can't just move one of the grids.
Take out tee where box is now and move over it over one foot, now you will have a spot for a 1x2 tile. Add another tee 2 feet from the one you moved, now you have a 2x2 tile where your light is. This will leave you a 1x2 tile space on the other side.
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Old 07-31-2013, 07:09 PM   #13
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Box Notched Over Ceiling Grid


Or add a 4 foot tile.
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Old 07-31-2013, 08:25 PM   #14
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Box Notched Over Ceiling Grid


Why can’t you cut the grid on both sides of the box and support those 2 grid sides with nailers ? Wouldn’t that all be hidden? Or is that just flat out whacky?
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Old 08-01-2013, 05:44 PM   #15
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Box Notched Over Ceiling Grid


Did nobody see kbsparky's post above? I was going to post the same thing! If you use a box designed for the purpose and install it properly it is perfectly legal and safe. I have used those boxes in acoustic ceilings many times and never failed an inspection!


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I have no problem with your solution.

You can buy metal boxes with those slots already in place.


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