Learn how to install cable trays for large-scale projects with our professional, step-by-step guide covering industry standards, safety protocols, and efficient routing techniques. How about organizing your wiring with a cable tray system? Smart move. Before starting, ensure you have the correct personal protective equipment (PPE), including gloves, safety glasses, and a hard hat. Check Regulations: Consult the National Electrical. To install a cable management system, start by assessing your needs and evaluating your space. Finally, install your system by. A cable tray is a robust support structure designed to accommodate and safeguard electrical cables and data communication lines.