Cable tray and cable ladder systems are an ideal alternative to electrical conduit systems. 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. en completely installed, without damage either to conductors or structural system use 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. es in the industrial environment. Our cable support. In the electrical wiring of buildings, a cable tray system is used to support insulated electrical cables used for power distribution, control, and communication. An effective layout ensures safety, minimizes interference, reduces maintenance time, and keeps the overall.