2 gang nail on boxes

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robbb32003

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I failed a inspection because inside the back of the 2 gang fiber glass nail on box said that it could take ? # 14, ? # 12, and 13 # 10 wires. the inspector is saying that because the box doesn't say that it can take # 8 wires that I cant use it as a range receptacle box and I have to use metal. just want to see if other people are thinking the same as me!:rolleyes:
 
It's not the numbers in the back that interest me, but the integral cable clamps in the fiberglass box that aren't rated for that large a cable. I think that would be a 110.3(B) violation in the least. I'd worry about it cutting into the cable, depending on how it was installed.

But as far as box fill goes, the imagine the range receptacle box is only slightly bigger than the two gang.
 
robbb32003 said:
I failed a inspection because inside the back of the 2 gang fiber glass nail on box said that it could take ? # 14, ? # 12, and 13 # 10 wires. the inspector is saying that because the box doesn't say that it can take # 8 wires that I cant use it as a range receptacle box and I have to use metal. just want to see if other people are thinking the same as me!:rolleyes:
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Just use a surface range recep. I never install a recessed box for a range.
 
99% of the time I use surface mount too. BUT....some ranges have such a small amount of space in the back that they actually spec a flush mount receptacle in the installation instructions.
 
2G or 4S plastic nail ons are common here for range/dryers. Never been turned down. Box fill should be the only issue.


Does a metal box say it will take #8"s?

I don't think a metal box says anything.
 
Cubic inches should be the only issue (that and the integral connection, good point ;) ) I believe the specffic number of 14, 12, and 10 wires is a listing requirement, not a limitation. I have never had a problem with NM protection being an issue on surface mounted outlets.
 
robbb32003 said:
I failed a inspection because inside the back of the 2 gang fiber glass nail on box said that it could take ? # 14, ? # 12, and 13 # 10 wires. the inspector is saying that because the box doesn't say that it can take # 8 wires that I cant use it as a range receptacle box and I have to use metal. just want to see if other people are thinking the same as me!:rolleyes:
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They make a two gang box rated for #8 just for this reason.
 
Cavie said:
They make a two gang box rated for #8 just for this reason.
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I've seen those, and I thought they were made by Carlon, but I can't find them anywhere.

360Youth said:
Tough bend.
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No bending. Straight out of the hole in the wall, through a connector in the back of the device.
 
480sparky said:
No bending. Straight out of the hole in the wall, through a connector in the back of the device.
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I just meant the conductors into set screws, not the cable itself. I see where you are coming from, though.
 
360Youth said:
I just meant the conductors into set screws, not the cable itself. I see where you are coming from, though.
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I think it's far easier to bend one #6 or #8 at a time then bend all 4 at the same time.
 
You have an inspector that lacks comon since.However he is right if he wants to push it.You modified the box to get it in.20 plus years ago that was how i was trained to do it,but that does not make it ok.I personally got burned to often on placing a box for range.It cant be in center or within 6 inches of either side or you might have promlem.Out of 30 inches i just removed almost 24 and box is 4.Get smart and use surface mount.
 
monkey said:
Big Orange has just started carrying them in my area.
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That's my thinking as well, but Carlons' web site isn't very helpful in finding stuff unless you already know the catalog number.
 
480sparky said:
That's my thinking as well, but Carlons' web site isn't very helpful in finding stuff unless you already know the catalog number.
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Maybe it will get better now that Carlon is part of T&B.
 
360Youth said:
....I believe the specffic number of 14, 12, and 10 wires is a listing requirement, not a limitation.....
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I believe that those numbers are in there as a convenience, to save you time looking up in the book for the same information.

The Code requires that non-metallic boxes be ".... durably and legibly marked by the manufacturer with their volume..." [see 314.16(A)(2)] The Code does not require that the number of conductors be included with this information. The manufacturers provide that additional information as a convenience to the installer.

According to my calculations, a typical 36 cubic inch 2-gang box is capable of holding 12 #8 AWG conductors. Deducting 2 for the device and another one for built-in clamps still allows for 9. Terminating a #8/3G cable into that box under those conditions means you have more than double the space requirements available.
 
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