· RIP 1959-2015
A device or utilization equipment wider than a single 50 mm (2 in.) device box as described in Table 314.16(A) shall have double volume allowances provided for each gang required for mounting.
For big devices that take up more than one gang, count a double volume for each gang the box takes up. For example, here is my box fill calculation for a box containing a receptacle for a 30 A 120/240 electric dryer that takes up two gangs. Nothing else is in the box:
3 #10 conductors @ 2.50 cubic inches each = 7.5
EGC = 2.5
dryer receptacle = one double volume for each of the two gangs = (2.5+2.5) + (2.5+2.5) = 10
7.5 + 2.5 + 10 = 20 cubic inches
I know we just put them in a double gang at work, but I'm trying to understand.
That's what we all do:thumbsup:
These are good if you doing old work..http://t.homedepot.com/p/Carlon-2-G..._pip1_rr-1-_-NA-_-100315472-_-N&showPLP=false
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