This guide provides practical maintenance plans for EPC contractors and plant managers. We focus on structural integrity, harsh environment corrosion, and a one-stop system check to manufacture trays, supports, and fasteners that safeguard your valuable power infrastructure. Is your cable tray system optimized for safety, dependability, space and cost savings? Cable tray (or cable ladder) systems are a popular alternative to electrical conduit systems, as they have an outstanding record for dependable service, design flexibility and cost savings in commercial and. 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. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when the cable tray cont d for instrumentation and control applications that require. Most projects are roughly defined at the start of cable tray design. For projects that are not 100 percent defined before design start, the cost of and time used in coping with continuous changes during the engineering and drafting design phases will be substantially less for cable tray wiring. Cable tray design is an essential practice in electrical infrastructure and network projects. Below are 100 questions that comprehensively cover the basic definitions, material classifications, selection. An effective layout ensures safety, minimizes interference, reduces maintenance time, and keeps the overall system organized. Separation of Electrical and Instrumentation.