Due to their exposure to the open air because of the cable trays, the wires contained within need a very durable outer covering. The regulations dictate that the cables must either be Type TC (also known as Tray Rated) or must be metal-armored (Type MC). 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. NEC Article 392 outlines the key rules for installing and maintaining industrial cable tray systems. This is a description of how to select, install, and support these metal or plastic frames, on which electrical wires are installed. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. Materials and Finish: Material and finish specifications for each tray type are as follows: 1. All fabricated parts shall be made from Aluminum Association Alloy 5052. These guidelines will be useful to engineers, contractors, and maintenance personnel.
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