Cable Trunking System : A system of enclosures comprised of a base and a removable cover intended for the complete surrounding of insulated conductors, cables, and cords
NFPA 79 Electrical Standard for Industrial Machinery, 2002 ed. http://www.nfpa.org/assets/files/AboutTheCodes/79/ 79-A2002-rop.pdf, (Electr Std for Ind Machinery - Amer) {225 NFC}