The “TC” in Type TC literally stands for “tray cable. ” Cable trays are the open, ladder-like or solid-bottom raceways mounted along ceilings and walls in factories, power plants, and large commercial buildings. (If you need a primer on tray cable fundamentals before diving into this comparison, start with our complete guide to tray cable. National Electrical Code (NEC) and UL 1277 standard, a Tray Cable is a factory-assembled, multi-conductor cable (two or more insulated conductors, with or without a grounding conductor) enclosed in a non-metallic overall jacket. They are extensively deployed in manufacturing facilities, especially in process industries: petrochemical, steel, pulp and paper, cement and mining. What Is a Tray. The purpose of a cable tray system is to support, route, and protect cable as part of the cable management system. Through NEMA and the Cable Tray Institute numerous articles, standards, and other general guidance can be found regarding the proper use and installation of cable tray systems.
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