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..........It says:
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.
My interpretation:
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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