ConstructionStranded coated copper conductors. The insulation shall be either fire retardent ethylene propylene rubber (FREP) or fire retardant cross-linked Polyethylene (FRXLPe). Method 1-Table K1 color-coded, conductors twisted with suitable fillers, helically applied copper tape shield, CSPE jacket overall, surface printed.Standards1) TC Type Tray Cable per Article 340 of the NEC.2) Individual conductors pass UL Standard 44 and the VW-1 vertical flame test.3) Individual conductors approved as Type XHHW.4) Cables Pass IEEE-383 ribbon burner flame test.5) Overall jacket approved as Sunlight Resistant.6) Cables meet requirements of ICEA Pub. No. S-66-524, NEMA Pub. No. WC7, Cross-linked Polyethylene Insulated Wire and Cable.