Encore Wire now offers aluminum conductor with SuperSlick Type XHHW-2 insulation compound is rated sunlight resistant (6 AWG and larger) in all colors. Cables comply with UL’s VW-1 (vertical wire) flame test. 1/0 AWG and larger are rated for use in cable tray in accordance with the National Electrical Code. 1/0 AWG and larger comply with IEEE1202 / FT4 flame test and ICEA T-29-520 (210,000 Btu/hr) flame test.