Advantage of Cable Ladder Tray:
♦ Full free air rating of cables, results in smaller conductors vs.
♦ Greater fill volume allowed, results in less space
♦ Used in all locations except elevatorshafts (the only prohibition
on cable tray use)
♦ Used as an equipment grounding conductor
♦ Less stress on cables during installation and operation
♦ Increased safety, no moisture condensation problems nor
transmission of corrosive or explosive gases, as with conduit
♦ Simplified maintenance with the flexibility of adding or changing
♦ Simplified engineering and construction. Add, change, modify more
♦ Used with other wiring methods
♦ Longer support spans up to 55'