2 gang nail on boxes

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kbsparky said:
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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I know it states a deduction of 2 conductors per yoke, but wouldn't you have to deduct 4 conductors since the range receptacle takes both sets of mounting holes in the box? In other words, I know the piece of metal Yoke for the range receptacle is only one piece, it does consist of four slots for securing the device at four different points in the two gang box, therfore effectively taking the room of 2 yokes and therefore the deduction of 4 conductor sizes.

I also know that the answer is moot to this example, as there would still be ample room of conductor fill for the box. Just curious as to how you view it.

edited for spelling
 
The Code requires no additional consideration for larger mounting yokes. FWIW, you can install a dryer or range flush mount receptacle into a single gang box, provided it's deep enough.
 
Energize said:
I know it states a deduction of 2 conductors per yoke, but wouldn't you have to deduct 4 conductors since the range receptacle takes both sets of mounting holes in the box? In other words, I know the piece of metal Yoke for the range receptacle is only one piece, it does consist of four slots for securing the device at four different points in the two gang box, therfore effectively taking the room of 2 yokes and therefore the deduction of 4 conductor sizes.

I also know that the answer is moot to this example, as there would still be ample room of conductor fill for the box. Just curious as to how you view it.

edited for spelling
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Ayoke is one no matter how many screws.Cubes of 2 gang plastic far more than needed
 
F202S-w-NM95-1.jpg



F202N-w-hammer1.jpg


Arlington?s new non-metallic, two-gang outlet box mounts directly to a wood or metal stud for a super-secure installation. ​
? Perfect for dryers, ranges and other appliances ​
? Non-conductive plastic ​
Includes Arlington cable connectors NM95 and NM842 for the installation of a variety of cables
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Arlington


Personally...I prefer a deep 5" box (4 11/16ths for those types )
 
We merely cut a hole in the box using a uni-bit, and then install a hit-lock connector for the cable. Same type of connector supplied with the Arlington box.

You're allowed to cut your own knockout in metal boxes, as well as many non-metallic boxes. The presence of built-in clamps does not prohibit one from cutting additional knock-outs as needed, IMO.
 
kbsparky said:
The Code requires that non-metallic boxes be ".... durably and legibly marked by the manufacturer with their volume..." [see 314.16(A)(2)] .
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I knew that. I was just testing you. You can thank me later. :D
 
kbsparky said:
We merely cut a hole in the box using a uni-bit, and then install a hit-lock connector for the cable. Same type of connector supplied with the Arlington box.

You're allowed to cut your own knockout in metal boxes, as well as many non-metallic boxes. The presence of built-in clamps does not prohibit one from cutting additional knock-outs as needed, IMO.
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I understand that in many types of metal enclosures, that the enclosure can be altered.
For device boxes and smaller boxes such as 1900 and 4-11/16 boxes where have you seen a manufacturer mention that those boxes can be altered? or is this just a field practice?
I am not disagreeing, I am curious as to that being so, especially with plastic boxes, as the structure of the sidewall of plastic boxes could be compromised by altering it. JMHO
 
georgestolz said:
Dennis, why not? How do you protect the NM?
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You can sleeve the nm in a conduit but behind the range I don't believe it is necessary. It is not subject to damage if it is place properly.

I don't use a recessed box because it often ends up in a bad spot behind the range. If I come up through the floor i can move the wire anywhere behind the unit without much difficulty.
 
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