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. 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. An effective layout ensures safety, minimizes interference, reduces maintenance time, and keeps the overall. Article Summary: A compliant cable tray installation requires a thorough understanding of NEC Article 392, proper structural support, and precise installation techniques. Plan the Route Before You Drill No installation should start without a plan. Factor in clearance, load capacity, and cable separation needs from the get-go. Most projects are roughly defined at the start of cable tray design. What is Cable Tray Design and Wiring Planning? At its heart, Cable Tray Design, Layout means choosing and.