Cable tray is one of the construction equipment used for cabling and wiring of buildings. The cable tray accommodates the wires and, in addition to sorting, maintains the safety of the building’s wiring. The cable tray can be used in different environments and places. (Closed space, open space, humid environments, high-risk environments, as well as environments with electrical noise or vibration). Cable trays, like any other electrical equipment, must have specific standards and valid approvals.
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The National Association of Electrical Manufacturers has published guidelines and handbooks for how to use, transport, and related connections, as well as information on cable tray maintenance and repair. Compliance of the cable tray with these standards ensures its correct installation and proper operation. The cable tray can be installed and used on the wall, ceiling, floor, and even in hard-to-pass paths vertically. The cable tray also has the necessary safety in dangerous environments that are exposed to fire. Installation of the cable tray must be done by professional designers and engineers, because if it is installed incorrectly, it may cause fire and explosion. For environments where the possibility of fire is high, a special cable tray should be used. The cable tray is available in different sizes, and for this reason, it is suitable for all types of buildings and any type of configuration. The cable tray is flexible and has the ability to change shape. For the safe and correct installation of the cable tray, the following three indicators should be considered: the weight limits of the different cable trays, the environmental restrictions, the rules related to the distances of the wires.
The appropriate number and size of the cable tray depends on the number of wires that are going to be placed in it, as well as the environment where the cable tray is going to be installed. Since the cable tray is flexible and changeable, engineers and designers must design and size the cable tray system in such a way that it is suitable for both current use and future needs.