Fittings (Bends and Tees): These components allow the system to change direction and branch out., 30°, 45°, 90°). The selection of material and finish is a function of the environment in wh tant in a wide range of environments, and easily formable (Appendices II and III). A typical cable tray. 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 industrial applications.