A cable tray is an organized support structure designed to secure and route these insulated electrical cables. It acts as a dedicated pathway for power distribution and data transmission, often supporting cables hidden behind walls or above ceilings. They are designed to accommodate and support multiple cables, providing a systematic approach to wiring. What are the three Main Types of Cable Trays? What is the Importance of Cable Tray Installation? What makes a Cable Tray Rated? What is Cable Tray? In electrical cabling, a cable tray is a metallic structure used to handle insulated electrical power distribution, control, and communication cables. Ladder Type: The strongest design, featuring side. In this guide, we explain what cable trays are, the main types available, how to choose the correct size and duty rating, and what to consider when designing a cable tray installation.