Cable ladder systems and cable tray systems are designed for use as supports for cables and not as enclosures giving full mechanical protection. 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. The cable support lengths and fittings can basically be designed as cable trays, cable ladders or mesh cable trays, in which cables are routed. Fittings can, on the one hand, be used for horizontal or vertical changing of the routing direction or, on the other, to change the height or width of the. Cables may exit or enter through the top or the bottom of the tray. They are not intended to be used as ladders, walk ways or support for people as this can cause personal injury and also damage the system and any. Here is the summary of the main points found in NEC Article 392: Cable trays can be used as a support system for various wiring methods, including service conductors, feeders, branch circuits, communications circuits, control circuits, and signaling circuits (392. An effective layout ensures safety, minimizes interference, reduces maintenance time, and keeps the overall.
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