A cable tray serves to group and support cables, allowing for their routing to a specific destination. However, it does not provide mechanical protection. A trough accomplishes a similar purpose but is enclosed, thus providing mechanical protection for wires that would otherwise be. A Solid Bottom Cable Tray is very similar to a trough tray, but with one key difference: its bottom is completely solid. This design creates a fully enclosed channel once a lid is added. It. Whether you're running power cables, data lines, or control wiring, the right choice between cable trays, baskets, ladders, and trunking can save time, reduce maintenance, and extend system life. Understanding the Four Main Cable Containment Systems Cable trays are solid or perforated metal. Cable tray systems are engineered support structures designed to route, support, and protect insulated electrical cables used for power distribution, control, instrumentation, and communication. Cable trays are used as an alternative to open wiring or electrical conduit systems, and are commonly used for cable management in. maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray.