Power-Limited Tray Cable (PLTC) is designed specifically for tray installations. Learn NEC Article 392 requirements for cable trays, including grounding, bonding, fill capacity, and compliant installation for power, control, Ethernet, and. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned in this technical guide only apply to our own cable management ranges and cannot under any circumstances be transposed to si osure, overheating or. The National Electrical Code (NEC) Article 392 plays a vital role in establishing standards for cable tray systems, which are essential components in modern electrical infrastructure. There is no restriction as to where the cable tray system is installed. The metal in cable trays may be used as the EGC as per the limitations. association representing the major electrical equipment manufac-turers in the U. The Cable Tray ng standards, performance standards, test standards and application in this document have been tested extens ompetent professional en completely installed, without damage either to conductors or. The primary rulebook used in the safe use of cable trays is NEC Article 392.