Hubbell's NEXTFRAME® Ladder Tray is the effective and widely used cable runway that supports and delivers bundles of cable between cabinets, racks, and closets, along walls, and suspended from ceilings. Cable tray systems are engineered support structures designed to route, support, and protect insulated electrical cables used for power distribution, control, instrumentation, and communication. Unlike conduit systems, cable trays allow cables to be laid in bundles, improving accessibility, heat. There are several types of cable trays, including ladder, perforated, solid bottom, basket, and channel trays. Each cable tray type performs a different function and comes in various materials such as aluminum, galvanized steel, and FRP. Fittings can, on the one hand, be used for horizontal or vertical changing of the routing direction or, on the other, to change the height or width of the. Although typically suspended from ceilings or affixed to walls, some cable tray systems are suitable for underfloor use. The following are popular cable tray types. Ladder Type Cable Tray The ladder type cable tray consists of two side rails connected by rungs, allowing excellent airflow around cables. Applications: Power plants and substations, Heavy.