Add up the total number of cables to be installed. Power cables: Require more space for heat dissipation. Horizontal routing: Broad base. 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. In industrial settings, electrical and instrumentation (E&I) cable trays or bridge racks play a critical role in organizing and supporting power, control, and signal cables across facilities. An effective layout ensures safety, minimizes interference, reduces maintenance time, and keeps the overall. 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. During the design of a cable management system, one of the most important questions is the cable tray capacity. The capacity does not depend on size only but also on cable type, diameter, and allowable fill capacity to allow safe and efficient operation. The fill rules differ significantly between single-conductor cables and multiconductor cables, and between ladder tray and solid-bottom tray.