Every marking tells a story about how that cable is built, what environments it's rated for, and whether it can legally be used in the application your contractor is quoting. Let's break down a typical tray cable jacket marking: 12 AWG 3C TC-ER-JP SUN RES DIR BUR 600V 90C. Cross-linked polyethylene (XLPE) is a common choice for both power and control tray cables, providing excellent resistance to UV, heat and moisture. UV-stabilized PVC is another widely used material, with special additives that help prevent discoloration, cracking and premature aging in sunlight. 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. Instrumentation cable trays are critical for organizing and protecting electrical and signal cables in industrial environments. The process described here takes a systematic approach to ensuring that cable tray installations meet safety, reliability, and project-specific needs while following to. Clarifies the means used to identify UL Certified, Listed, Classified and Verified wire and cable.