Explore various cable tray types and sizes for electrical installations. Learn about ladder, perforated, solid-bottom, wire mesh, and channel trays in this complete guide. What is Cable Tray Systems? An electrical cable tray is a type of containment system used to support insulated electrical. Cable trays play a crucial role in managing and supporting electrical cables in industrial, commercial, and residential applications. Selecting the right tray helps improve safety, heat dissipation, cable life, and ease of maintenance across industrial and commercial projects.