Cable Management Tray Size: Choose a tray size that will hold the desired amount and length of cable. Support Spacing: Remember the NEC requires no more than 4 feet of support spacing. Bend Radius: The tray cable bend radius should be supported to avoid damaging. 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 industrial applications. The spacing between trays, whether horizontal or vertical, depends on various factors like cable type, environment, and tray material. 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. us-trations without notice. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. The overall layout of the cable tray should be short distances, economic feasibility, safe operation, and meet the requirements for construction, maintenance, and cable laying. After cable. In this installment of our Code Corner series, Ryan Mayfield focuses on the 2023 National Electrical Code (NEC) changes concerning cable trays, particularly section 690.