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-   -   install ceiling box for fan while drywall is off (http://www.diychatroom.com/f18/install-ceiling-box-fan-while-drywall-off-132873/)

collegetry 02-07-2012 06:33 AM

install ceiling box for fan while drywall is off
 
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Been wanting to install a ceiling fan in living room but there is no ceiling box. Had to take some drywall off one of the walls for an unrelated issue so figure now is the time to run wire before closing it back up.
Looking at the picture the fan box would go near the X on the ceiling. There is a single switch not shown in the photo all the way to the right of thephoto where the black arrow is. This switch controls the top half of the receptacle below the window. In the single switch box there is power and neutral wires.

How to proceed?

plummen 02-07-2012 07:41 AM

Id install a full size pan box where you want the fan to go,if theres not a rafter right there double up a couple 2x4s on edge and put them between the 2 nearest rafters to mount your box.
I usually run 14/3 from switch box to ceiling box in case you want to seperate light/fan.
Rewire the 1/2 switched plug in wall so you can just have a normal hot plug there all the time :)

joed 02-07-2012 07:46 AM

You said "In the single switch box there is power and neutral wires." Does that mean you only have a black and white wire? If you only have black and white then you do not have a neutral wire. You need a new cable or you will need to rewire the receptacle to be not switched so the cable can be used as a feed.

collegetry 02-07-2012 07:59 AM

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Quote:

Originally Posted by plummen (Post 846677)
Id install a full size pan box where you want the fan to go,if theres not a rafter right there double up a couple 2x4s on edge and put them between the 2 nearest rafters to mount your box.
I usually run 14/3 from switch box to ceiling box in case you want to seperate light/fan.
Rewire the 1/2 switched plug in wall so you can just have a normal hot plug there all the time :)

plummen I know the ceiling joists run out or perpendicular to the window like the photo. If they didnt I would not even try this on my own. Figure if I can hit the right joist cavity from the double top plate I can run the wire in that joist cavity to a fan rated box. If the ceiling joists were running parallel to the window, then I wouldnt contemplate this probably.

And are you suggesting using the existing switch, which now operates the top of the receptacle, to operate the fan? I guess I could replace the single switch with a double switch to operate the fan/light separately.

And to joed: in the single switch box there is not a switch loop, there are hots and neutrals(and grounds)

hammerlane 02-07-2012 10:17 AM

Don't eliminate the switched outlet just yet to reuse that switch for the fan. Do you have room where your single switch is to add a double gang box and add a new switch for the fan?

J. V. 02-07-2012 10:44 AM

I would not use a pancake box, I would use a fan rated box screwed to the stud or a 2x4 installed just for mounting the box. Now is the time to do it. Run a 3 conductor NM cable up there to. Wire it so the fan and the light can be operated independently. This will be easy as you say you have a hot and a nuetral in the existing switch box.

collegetry 02-07-2012 12:15 PM

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what about this box by westinghouse rated for ceiling fans. I will be able to secure it right into a joist.

brric 02-07-2012 02:27 PM

Quote:

Originally Posted by collegetry (Post 846880)
what about this box by westinghouse rated for ceiling fans. I will be able to secure it right into a joist.

Perfectly fine. We use them all the time.

rrolleston 02-07-2012 03:24 PM

I like those too but I use longer screws.

collegetry 02-07-2012 03:29 PM

Quote:

Originally Posted by rrolleston (Post 847017)
I like those too but I use longer screws.

good call on the longer screws. I'll post some photos when we get stuff run. I have room on the wall where the single switch is to put a 3 gang box. This way I can have one switch for the outlet still, one switch for the fan and one for the light on the fan

rrolleston 02-07-2012 05:01 PM

Great. I like having the separate wall switches for my fan and lights

plummen 02-07-2012 10:13 PM

Quote:

Originally Posted by joed (Post 846680)
You said "In the single switch box there is power and neutral wires." Does that mean you only have a black and white wire? If you only have black and white then you do not have a neutral wire. You need a new cable or you will need to rewire the receptacle to be not switched so the cable can be used as a feed.

If he rewires that half switched plug like I said he'll have his power/neutral wires for the circuit. :thumbsup:

plummen 02-07-2012 10:22 PM

Quote:

Originally Posted by J. V. (Post 846811)
I would not use a pancake box, I would use a fan rated box screwed to the stud or a 2x4 installed just for mounting the box. Now is the time to do it. Run a 3 conductor NM cable up there to. Wire it so the fan and the light can be operated independently. This will be easy as you say you have a hot and a nuetral in the existing switch box.

Why wouldnt you use a full size pan box?
The full size boxes are rated for fans :)

plummen 02-07-2012 10:24 PM

Quote:

Originally Posted by collegetry (Post 846880)
what about this box by westinghouse rated for ceiling fans. I will be able to secure it right into a joist.

That would be the pan box I was referring too,they come in small and large sizes :thumbsup:

collegetry 02-08-2012 07:02 AM

We're gonna go with the westinghouse 1/2" pancaker cut into the ceiling and attached to a joist.
Plan is to cut in a new 3 gang box where the single switch is.
Drop 12-3 down into the basement, across a few feet to get to the left of the duct run shown in the photo.
Then run the 12-3 back up in the stud cavity just to the left of the duct run then thru the cripples above the header into a hole in the double top plate and then have fun fishing the 12-3 thru the ceiling joist cavity to the cutout where the pancaker will go.

Will post photos.


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