Cable tray systems shall not be used ______.
a) in hoistways
b) where subject to severe physical damage
c) in hazardous (classified) locations
d) a or b
See answer and applicable Code reference
The correct answer is: d) a or b
Article 392 covers cable tray systems, including ladder, ventilated trough, ventilated channel, solid bottom, and other similar structures. As noted in Sec. 392.12, "Cable tray systems shall not be used in hoistways or where subject to sever physical damage."