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Old 02-08-2012, 12:57 PM   #16
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install ceiling box for fan while drywall is off


Ok so far we've done just as I said above. Only halt so far is our hardware store didnt have a 3gang old work box. I'll have to get that tomorrow. I put some pictures up showing the 12-3 running up the stud cavity, thru the cripples to the pancaker in the ceiling.

Hardest part was fishing the 12-3 from the double top plate to the hole for the pancaker in the ceiling. That took a good 45 minutes.
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Old 02-08-2012, 02:29 PM   #17
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The pancake box is too small for the 12-3 cable. The pancake might have 8 cibic inch capacity. The 12-3 has 4*2.25=9 cubic inches. The box is overfilled. The canopy can only be used if the capacity is marked.
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Old 02-08-2012, 03:07 PM   #18
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Why wouldnt you use a full size pan box?
The full size boxes are rated for fans
I like plenty room for the wires. And a pancake box can only accept one cable legally. I am not sure you could use a 12/3 cable due to box fill. Also, Never know should the OP want some recessed lighting or even another fan down the road.
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Old 02-08-2012, 04:26 PM   #19
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install ceiling box for fan while drywall is off


Ive never seen 12/3 run for a fan before,i was expecting 14/3
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Old 02-08-2012, 05:19 PM   #20
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Thanks to all who pointed things out and offered suggestions.


quote:Jim Port
{The pancake box is too small for the 12-3 cable. The pancake might have 8 cibic inch capacity. The 12-3 has 4*2.25=9 cubic inches. The box is overfilled. The canopy can only be used if the capacity is marked.}

Just checked, the pancaker has only a 6 cub inch capacity. makes no sense. why make it that small if not even three 12 gauge wires can fit in it? Do they anticipate you using the fan canopy as additional box fill? I could change out to an 4 x 1-1/2 deep octagonal box but since the drywall on the ceiling is 1/2 inch, 1 inch of the octagonal box will not be flush with the ceiling edge.
I have not decided on a fan yet but i dont think I'm gonna base my decision on whether or not the canopy can be used as box fill. If I'm a few cubes off on box fill they'll had to red-tag me and shut it down

quote=J. V. {I am not sure you could use a 12/3 cable due to box fill. Also, Never know should the OP want some recessed lighting or even another fan down the road.}

You couldnt even use 14-3 legally then. Four 14-gauge wires would be 8 cub in. And as far as me ever adding another fan or recessed lighting. NOT AND DOUBLE NOT.


quote plummen:{Ive never seen 12/3 run for a fan before,i was expecting 14/3 }

The circuit is on a 20A breaker.


I'm afraid to post when done with the three switches but i will in the spirit of constructive criticism.

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Old 02-09-2012, 04:49 AM   #21
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install ceiling box for fan while drywall is off


According to 314.16 B1
You can omit equipment-grounding conductors and up to four 16 AWG and smaller fixture wires from box fill calculations, if they enter the box from a domed luminaire or similar canopy (e.g., a ceiling paddle fan canopy)

Doesnt help you with the 12-3 entering you box but at least you do not have to add the additional wires from the fan.
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Old 02-09-2012, 06:42 AM   #22
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Use a saddle box to install the fan.
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Old 02-09-2012, 07:00 AM   #23
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Did not even know a product like this was made.
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Old 02-09-2012, 10:20 PM   #24
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Ive never seen 12/3 run for a fan before,i was expecting 14/3
Seriously???in all your years you really have never seen that. all four ceilining fans in my house have 12 gauge wire to all of them.
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Old 02-09-2012, 10:29 PM   #25
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Not on a residential install anyway.
Nobody around here wants to work that hard fighting with 12/2 to feed circuits unless it has to be!
Now on commercial stuff I rarely see anything smaller than #12 pulled through pipe for anything including lights except an occasional whip going to a fixture thats smaller
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Old 02-09-2012, 10:32 PM   #26
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Not on a residential install anyway.
Nobody around here wants to work that hard fighting with 12/2 to feed circuits unless it has to be!
Now on commercial stuff I rarely see anything smaller than #12 pulled through pipe for anything including lights except an occasional whip going to a fixture thats smaller
OK but still there is no harm in using 12 gauge wire for the fan especially if like he said it is on a 20 breaker
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Old 02-09-2012, 10:34 PM   #27
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none at all,just harder is all.
But given the circumstances its the only real option within reason
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Old 02-10-2012, 12:20 PM   #28
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On the 2nd picture on post 14 did one of your cripple studs fall? Also see it in the 1st photo of the same post
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Old 02-11-2012, 02:16 PM   #29
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On the 2nd picture on post 14 did one of your cripple studs fall? Also see it in the 1st photo of the same post
no that wasnt a cripple stud. But we did finally get the 3 gang old work box cut in and added two more switches and new drywall back up and primed. So now from right to left the swithches control, fan light, fan blades, top half of outlet under window. now to decide on a fan
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Old 02-11-2012, 02:27 PM   #30
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