TC (tray cable, per NEC Article 336, UL 1277) is a versatile cable suitable for use in cable trays, raceways and even direct burial (if specifically rated). To that end this Bulletin is intended to discuss the types of cables most frequently used in cable trays and the wiring methods permitted in cable trays under the National Electric Code (NEC) NFPA 70. There are many different types of cable tray including basket, ladder and solid-bottom. In the case of large undertakings, it is not only the low price that matters when selecting the appropriate system. It is the concern of ensuring that the metal is. A cable tray system is a unit assembly of sections and fittings that forms a rigid structural system used to securely fasten or support cables and wiring. A complete system is made up of. According to the NEC (National Electric Code), tray cable is defined as “a factory assembly of two or more insulated conductors, with or without associated bare or covered grounding conductors under a nonmetallic sheath, for installation in cable trays, in raceways, or where supported by a. Tray cables (TC) are multi-conductor cables designed and rated for installation in cable trays and raceways or supported by messenger wires.
