The answer is simple: different cable characteristics and installation environments demand different tray designs. Cable weight, heat generation, bend radius, environmental exposure, and maintenance access all directly influence which cable tray type is technically appropriate. The cable support lengths and fittings can basically be designed as cable trays, cable ladders or mesh cable trays, in which cables are routed. 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. cable trays are equivalent. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned in this technical guide only apply to our own cable management ranges and cannot under any circumstances be transposed to si osure, overheating or. A captive fixing bracket used to secure channel side by side on the same plane or channel on a horizontal plane to channel on a vertical plane. Unlike conduit systems, cable trays allow cables to be laid in bundles, improving accessibility, heat. ies aluminum alloys (Aluminum Association designation) to manufacture cable tray.