The function is to provide a continuous, supported pathway that prevents cables from lying loose and vulnerable to physical damage. The system includes straight sections, fittings, and support hardware. A cable tray is an organized support structure designed to secure and route these insulated electrical cables. Aluminum's exceptional corrosion resistance, particularly. Understanding the types of cable containment systems, including trays, trunks, and conduits, helps engineers and contractors select the best solution for performance, safety, and compliance. Cable trays come in different types: Materials: They can be metal (like steel with a coating, or stainless steel), plastic (like.