A device or utilization equipment wider than a single 2 in. device box shall have _____ volume allowances provided for each gang required for mounting.
a) single
b) double
c) triple
d) none of the above
See answer and applicable Code reference
The correct answer is: b) double
Article 314 covers the installation and use of all boxes and conduit bodies used as outlet, device, junction, or pull boxes. As noted in part of 314.16(B)(4), "A device or utilization equipment wider than a single 2 in. device box as described in Table 314.16(A) shall have double volume allowances provided for each gang required for mounting."