A cable tray system is a metallic bridge that securely contains electrical wires. In the case of large undertakings, it is not only the low price that matters when selecting the appropriate system. Why use cable tray? A properly designed and installed cable tray system provides outstanding reliability for a facility's control, communication, data, instrumentation and power systems cabling and wiring. 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. us-trations without notice. All illustrations, descriptions and technical information included in this document are provided as indications and can cable trays are equivalent. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. Protect cable from carts, pedestrians, and other light indoor traffic while reducing tripping hazards. An effective layout ensures safety, minimizes interference, reduces maintenance time, and keeps the overall. The Cable Tray Institute (CTI) was founded in 1991 to support the cable tray industry by engaging in research, development, education, and the dissemination of information designed to promote, enhance, and increase the visibility of the industry.