Cable tray

They are especially useful in situations where changes to a wiring system are anticipated, since new cables can be installed by laying them in the tray, instead of pulling them through a pipe.

Ladder and ventilated trays may have solid covers to protect cables from falling objects, dust, and water.

Tray covers for use outdoors or in dusty locations may have a peaked shape to shed debris including dust, ice or snow.

[3] Large power cables laid in the tray may require support blocks to maintain spacing between conductors, to prevent overheating of the wires.

[7] Regular housecleaning is important for safety, as cable trays are often installed in hard to reach places.

This also applies to any silicone foam seals, but is easily remedied through the use of firestop mortars of sufficient compression strength and thickness, as shown above.

Also, some building codes mandate that penetrants such as cable trays are installed in such ways so as to avoid their contribution to the collapse of a firewall.

Cable trays can be used in commercial and industrial buildings
Firestopped cable tray penetration with teck cables
Fire test in Sweden , showing rapid fire spread through burning of cable jackets from one cable tray to another
Cable spreading room at Point Tupper
Seismic bracing of a cable tray trapeze support. The diagonal strut and horizontal tie restrains motion longitudinally and laterally.