Electrical fixture box installation

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Old 04-26-08, 09:25 AM
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Electrical fixture box installation

I need to install an electrical box for a ceiling fan in the master bedroom. But this will be my first attempt in the middle of a slanted ceiling. I have not inspected the attic yet. 10 year old house. I already installed three of them in the kids rooms but these are 8 foot ceilings. I used pancake boxes for these rooms. Looking for any tips.

 
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Old 04-26-08, 09:35 AM
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hopefully you used "fan rated" boxes. They are required.

vaulted ceilings present there own share of problems.
this first one is used when roughing in on a new contstruction build.
http://www.aifittings.com/whnew80.htm

here are a couple other boxes from the same manufacturer:
http://www.aifittings.com/n_4.htm

there are others out there my other manufacturers.
 
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Old 04-26-08, 05:27 PM
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Rick before i can able comment on that one is your home reqired a conduit [pipe] ?? other wise can use the MC [ metalclad] cable let us know then we can able steer ya right.

Merci,Marc
 
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Old 04-26-08, 06:02 PM
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good catch Marc. I didn;t even see he was from the Chicago area.
Yes nagra4s. please let us know.
 
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Old 04-26-08, 08:42 PM
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From this area, flex conduit is allowed up to six feet with a green ground wire.

There is a closet fixture I can tap into less then six feet away. This fan will be remote controlled so only hot wire will be required.

I assumed that all pancake boxes are fan rated with the correct screws in the joists.
 
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Old 04-26-08, 11:36 PM
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Originally Posted by nagra4s View Post
From this area, flex conduit is allowed up to six feet with a green ground wire.

There is a closet fixture I can tap into less then six feet away. This fan will be remote controlled so only hot wire will be required.

I assumed that all pancake boxes are fan rated with the correct screws in the joists.

for the pancake box approved for fan useage they will have marking in the box " approved for fan support " sometime they will add weight limit as well depending on which manufacter you get it from.

most ceiling fan box they useally have 10-32 thread on it they are typically much larger screws than standard luminaire screw are [ either 6-32 or 8-32 size]

and please do follow the instruction very carefully with it.

Merci,Marc
 
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Old 04-27-08, 07:38 AM
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Originally Posted by nagra4s View Post

I assumed that all pancake boxes are fan rated with the correct screws in the joists.
Nope. The only boxes that are fan rated are the ones that say "fan rated" on them.

314.27(D)
(paraphrased)

boxes used as sole support for a paddle fan shall be listed, marked by the manufacturer for this purpose and shall not support fans weighing more than 70 lbs. for boxes designed to support more than 35 lbs, the required marking shall include the max weight capacity.



what that means is. if you use the box for support, it must be marked as such.
 
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Old 04-27-08, 08:20 AM
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A few hours after I posted on the pancake boxes I then recalled that the fan rated ones do have 10/32 screws and are marked fan rated.

Back to the original question, what box for the sloped ceiling and do I need to cut the drywall for the fan cap?
 
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Old 04-27-08, 09:10 AM
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The ones that Nap listed above are the ones you need.


Quoted from Nap's message:

vaulted ceilings present there own share of problems.
this first one is used when roughing in on a new contstruction build.
http://www.aifittings.com/whnew80.htm

here are a couple other boxes from the same manufacturer:
http://www.aifittings.com/n_4.htm
 
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Old 04-27-08, 09:24 AM
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Originally Posted by nap View Post
hopefully you used "fan rated" boxes. They are required.

vaulted ceilings present there own share of problems.
this first one is used when roughing in on a new contstruction build.
http://www.aifittings.com/whnew80.htm

here are a couple other boxes from the same manufacturer:
http://www.aifittings.com/n_4.htm

there are others out there my other manufacturers.
These look to be for new work. What about installing this for old work. I know at least half of this ceiling has attic space.
 
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Old 04-27-08, 10:06 AM
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man, you're really going to make me work.

Ok, are you going to mount this directly under a rafter/truss or are you going to be in between two rafters/trusses?

are you mounting it at the actual peak or to one side of the peak?

If off to one side, how much angle will the hanger allow.
 
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Old 04-27-08, 12:15 PM
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nap...... you're ok! Your hard work is much appreciated!

I was going to install this right at the peak. I am not sure yet if this is going to be between or directly under a rafter. I assume I have flexibility for this choice.
 
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Old 04-27-08, 12:27 PM
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the difference would be great. with the one directly under the rafter, there are boxes that attach directly to the rafter.
if between rafters, it takes a special fan hanger bracket to span the gap between the rafters and the box mounts to that.

I'll be looking for both. For some reason finding them on the net is harder than walking into the wholesale house and saying "give me one of those old work (or remodel) brackets (or boxes) for hanging a ceiling fan on a vaulted ceiling at the peak"

actually, if using the bracket, you will need the bracket, a box, and a filler block to fit into the peak of the ceiling. Some of the boxes already have a flat on them for the cover plate to set against.

actually one question that could make a great difference.

at the peak, is there a board that runs the entire length of the peak or is the rock simply butted up against the rock fromthe other side with no wood above it?
 
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Old 04-27-08, 01:09 PM
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Let me add to Nap's comment related to the peaked ceiling fans i am sure you are aware with the length of downrod.

most ceiling fan wireing useally can take up to 24 inch down rods some have extra long wire for 36 inch downrods when you get the ceiling fan on sloped walls sometime it will really pay attetion to the set up especally with the wires length and the other thing if the fanblade get off balance it will wobble more worst when the downrod is more longer the worst it will wobble unless you get a ridgd mount for it [ not very often but some fan manufacter will required this if your downrod is more than XX of inches of downrod ] senice most ceiling fan genrally pretty well balnaced so it should not be the issue but kinda keep in your mind with that.

the last time i did use superlong downrod for moddifed A frame house it have 65 inch downrod for it.

Merci,Marc
 
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Old 04-27-08, 01:19 PM
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Marc makes a good point.

you also have to consider the size of the fan and how close it may be to the ceiling as it slopes.


I generally just let the blades carve a slot in the ceiling to run through but it is so unsightly.


(that last part was for comedic relief and was, of course, facetious)
 
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Old 05-01-08, 08:31 PM
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I wish I talked with my customer before this thread was started. She said that the fan can be installed 4 or 5 inches off the center peak. Problem solved with this slight slope (30 degrees). No special ordering of the fan boxes (nap you were right on that). A 6 inch drop down rod was needed (included with fan). Hope this thread helps someone.
 
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