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. The majority of large projects are governed by organizations such as NEMA or IEC. The supports are typically placed every 1. 0m): It saves money and uses fewer parts, but needs a tray that is. 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. en completely installed, without damage either to conductors or structural system use maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray. Factor in clearance, load capacity, and cable separation needs from the get-go. Before starting, ensure you have. On a project of considerable scope there are large quantities of strut, threaded rod, clips, connectors, ladder tray, fittings as well as hardware, all intended for specific functions and locations. Field personnel must be free to do their disciplines of electrical constructions, testing.