In contrast, cable trays allow faster installations, better airflow for cables, and easier upgrades. This makes them ideal for projects that require flexibility and long-term cost savings. What is the role of a cable tray in electrical engineering? A cable tray allows for the neat and aesthetic arrangement of cables, improves the reliability. Cable trays are support systems for power and communication cables and wires. Furthermore, they make it easier to upgrade, reconfigure, or relocate your network systems. Rather than enclosing cables inside conduit, cable trays provide an open, ventilated support system that allows: Because of this flexibility, cable trays are commonly used in. The cable trays do not build the wires in the thick pipes but rather leave them out in the open so that they can be seen and accessed. Keeps Cables Cool and Saves Money 2 2.