POWER AND CONTROL TRAY CABLE

Type TC 340-1. Definition. Type TC power and control tray cable is a factory assembly of two or more insulated conductors, with or without associated bare or covered grounding conductors under a nonmetallic sheath, approved for installation in cable trays, in raceways, or where supported by a messenger wire. 340-2. Other Articles. In addition to the provisions of this article, installations of Type TC tray cable shall comply with other applicable articles of this Code, especially Articles 300 and 318. 340-3. Construction. The insulated conductors of Type TC tray cable shall be in sizes No. 18 through 1000 kcmil copper and sizes No. 12 through 1000 kcmil aluminum or copper-clad aluminum. Insulated conductors of sizes No. 14 and larger copper and sizes No. 12 and larger aluminum or copper-clad aluminum shall be one of the types listed in Table 310-13 or 310-62 that is suitable for branch circuit and feeder circuits or one that is identified for such use. Insulated conductors of sizes No. 18 and No. 16 copper shall be in accordance with Section 725-16. The outer sheath shall be a flame-retardant, nonmetallic material. A metallic sheath shall not be permitted either under or over the nonmetallic sheath. Where installed in wet locations, Type TC cable shall be resistant to moisture and corrosive agents. Exception: Where used for fire protective signaling systems, conductors shall be in accordance with Section 760-16. 340-4. Use Permitted. Type TC tray cable shall be permitted to be used (1) for power, lighting, control, and signal circuits; (2) in cable trays, or in raceways, or where supported in outdoor locations by a messenger wire; (3) in cable trays in hazardous (classified) locations as permitted in Articles