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. This guide covers the critical steps, from selecting the right electrical cable tray and performing accurate cable fill calculations to managing a safe cable pull through and ensuring all bonding and grounding requirements are met. For licensed electricians, mastering these principles is essential. But before you lay the first tray or clamp down a single cable, you need a solid plan. This guide breaks down the process step by step. Our cable support. The following recommendations are intended to be a practical guide to ensure the safe and proper installation of cable ladder and cable tray systems and channel support and other support systems.