conductor fill in a 24 cu in box.

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IF i am running in 3, 14-3, 1,12-2 and this perticular box has cable clamp, fixture stud, and a equipment grounding conductor. AM I to cut the number of conductors that could fit in the box by 3 conductors? And is this box going to need to be 25.5 cu in? :roll:
 
Re: conductor fill in a 24 cu in box.

I hope some else responds but I'll give it a shot. I figure you will need at least 30 cu. in. box. 4 11/16 X 2 1/8 is 42 cu in box which is what I would use. You left out some information that would be useful.
 
Re: conductor fill in a 24 cu in box.

Not relating to specifically to the original question but have been wondering this for a whille...What counts as a clamp? Are the 'plastic one way things' found on most multi-gang platic nail-ons considered clamps?
 
Re: conductor fill in a 24 cu in box.

I get:
3 -14/3 = 9 x 2.00 = 18
1 - 12/2 = 2 x 2.25 = 4.5
Cable clamp = 2.25 (assuming internal ~ largest conductor size)
Fixture stud = 2.25 (assuming one ~ largest conductor size)
EGC = 2.25 (all EGCs count as one ~ largest conductor size)

TOTAL - 29.25

You're gonna need a bigger boat ;) ..but not by much - you're 5" box just needs to be 1/4" deeper(314.16(A))


A "clamp" is defined (sort of) in 314.6(b)(2)
IMHO, that plastic door is NOT a clamp...the staple above it does a better job of clamping.

{EDIT: I can't add...LOL]

[ April 11, 2005, 02:06 AM: Message edited by: celtic ]
 
Re: conductor fill in a 24 cu in box.

Originally posted by jimwalker:
If the box comes with a clamp and is stamped with cu in , is that number with we have if i remove the clamp ?
Click to expand...
The manufac. has no idea what size conductor will actually be used.
 
Re: conductor fill in a 24 cu in box.

Ok, I think I said 3, 14/3 and 1, 12/3 a fixture stud, cable clamp, and an equipment grounding conductor.
3 x 2.00 cu in= 6 times 3= 18 or 3x3=9x 2.00=18cuin. 3x 2.25 cu in =6.75 cu in. plus 2.25 for the stud, 2.25 for the clamp and 2.25 for the equipment grounding conductor. 3x 2.25 =
6.75 cu in + 6.75 + 18 =31.50 cu in. How am I doing????? How about a 4 11/16" x 2 1/8" box? What do you say??? :roll: I was wrong again. I did say 1 12/2 in the original post. comes to 29.25 cu in. sorry about the confusion.

[ April 11, 2005, 11:02 PM: Message edited by: html ]
 
Re: conductor fill in a 24 cu in box.

Originally posted by jimwalker:
why does the clamp grow from #14 to #10 ?
Click to expand...
It's got to do with the larger electrons in a #10...is this your first day? ;)
 
Re: conductor fill in a 24 cu in box.

Jim, the clamp is based on the largest conductor in the box, but I didn't see a number 10 included, I believe it was a number 12.
 
Re: conductor fill in a 24 cu in box.

Originally posted by luke warmwater:
Just a quick thought:

If Electricity comes from Electrons, does Morality come from Morons? :)
Click to expand...
I'd have to say yes.
 
Re: conductor fill in a 24 cu in box.

Originally posted by electrofelon:
Not relating to specifically to the original question but have been wondering this for a whille...What counts as a clamp? Are the 'plastic one way things' found on most multi-gang platic nail-ons considered clamps?
Click to expand...
No
 
Re: conductor fill in a 24 cu in box.

Originally posted by jimwalker:
If the box comes with a clamp and is stamped with cu in , is that number with we have if i remove the clamp ?
Click to expand...
Would not removing the clamp alter the UL listing? In other words was the box tested with or with out the clamp?
 
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