A Trough Cable Tray looks like a continuous “U” shape. It has a solid bottom and two side walls. This helps with cable ventilation to manage. Is your cable tray system optimized for safety, dependability, space and cost savings? Cable tray (or cable ladder) systems are a popular alternative to electrical conduit systems, as they have an outstanding record for dependable service, design flexibility and cost savings in commercial and. This is the role of the cable tray system—a structured framework designed to support and organize insulated electrical cables, control cables, and communication lines. Selecting a specific width will show cable trays with that width, as well as cable tray accessories compatible with that width. Selecting a specific height will. 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. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when the cable tray cont d for instrumentation and control applications that require. Trough trays are commonly used in: They are often selected when: A single-rail cable tray system consists of a central structural spine with cantilevered support arms that extend outward to carry cables.