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Old 05-29-2011, 03:17 PM   #1
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Surface Box for light


Hello;

I want to put light over my kitchen sink (not florescent). Center to the sink is 15-1/2" out and the joist is almost exactly at the same spot.

Could I just surface mount a pancake box, screwing it to the joist, drilling a hole up for the KO to the left side of the pancake box and running romex up through the hole? Then just make sure I have a fixture who's base is large enough to cover the box.

I can't think of anything wrong with doing this, it just seems a bit different, so I wanted to check.


Thanks

Jamie

p.s. it is a thick plaster ceiling, cutting a precision hole in it with a joist above the hole will likely end up involving patching / repainting (rotozip with plaster bit won't cut this plaster, I have to use the Sawzall with a special blade). But can be done if necessary.

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Old 05-29-2011, 05:10 PM   #2
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Ur fine in the way you want. U can also get a 4 1/8 hole saw but depending if its wire mesh, it might not be an option. On a side note...when u mount the pancake box, take out the center knockout and drill the joist in case the fixture u are hanging has a dowel that wont clear the shallow depth of the box. Also, make sure u use a connector for the wire

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Old 05-29-2011, 07:53 PM   #3
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You should not remove the center KO for the stud. The integrity of the box must be maintained. You would cut the fixture stud.

You should be able to mount the pancake box so a KO is not over a joist.

Remember to use a cable connector.
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Old 05-29-2011, 07:56 PM   #4
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Taking out the center ko for the dowel on a small chandalier does not affect the integrity of the box. If the center ko falls out on the center of the beam and the fixture is a small chandelier...how do u suppose to hang the fixture? Cut the stud? Cut the dowel? Its easier to take out the center ko and just drill a 5/8 hole
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Old 05-29-2011, 07:58 PM   #5
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Also, cutting the stud would ruin the integrity of the framing. Mounting the pancake so it hangs off the stud and screwing on one side is better than drilling a hole for the center ko and screwing both sides of the pancake? I don't think so....
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Old 05-29-2011, 09:08 PM   #6
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Leaving the open KO for the fixture stud could allow any arc or spark to escape into the cavity. This is why the NEC requires unused opening to be closed.
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Old 05-30-2011, 01:24 AM   #7
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a pancake box is designed to be mounted over top of a joist, in the thickness of the drywall. the drywall is cut out with a hole saw (or the like) and the box screwed in place, now flush with the ceiling. now one can begin to install cabling (only one romex can be in a pancake box) and finally the fixture.


However if more wiring space is needed they do make a box designed like a saddle to fit over a joist.
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Old 05-30-2011, 01:27 AM   #8
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Quote:
Originally Posted by jamiedolan View Post
p.s. it is a thick plaster ceiling, cutting a precision hole in it with a joist above the hole will likely end up involving patching / repainting (rotozip with plaster bit won't cut this plaster, I have to use the Sawzall with a special blade). But can be done if necessary.
they make a grit hole saw that does the trick like a dream. Can find them at the big box. the joist above make it easier, take a 1/4" drill bit and make a pilot hole in to the joist first and it will keep the saw from wandering.
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Old 05-30-2011, 01:35 AM   #9
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Maybe too many Cold Ones tonight, but I don't understand this removing the knockout, drilling a 5/8 hole (through the width end of a joist??)
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Old 05-30-2011, 02:15 AM   #10
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whatever it is your not susposed to do it.
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Old 05-30-2011, 09:32 AM   #11
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Quote:
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Maybe too many Cold Ones tonight, but I don't understand this removing the knockout, drilling a 5/8 hole (through the width end of a joist??)
That was to allow the 3/8" fixture mounting stud to have room if it was too long.
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Old 05-30-2011, 02:03 PM   #12
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You do not remove the center ko, use the proper length nipple or cut the nipple to fit.
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Old 06-01-2011, 11:04 AM   #13
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Thanks everyone for all the responses. I'm just using the bracket to mount smaller lights, so I am not worried about the center post.

I temporarily wired one up just to see how it looks and to get the height set right.

Had to nip off the screws to get the romex clamp to fit into the 1-1/4" hole I made.


Test setup to check height and see how it looks (yes, you should laugh at how I hooked it up to test it).



View from Outside:


Now I am going to go finish wiring these up.

Jamie
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Old 06-01-2011, 11:16 AM   #14
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The wire is showing!
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Old 06-01-2011, 12:18 PM   #15
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This is a bit better....







Jamie

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