Photovoltaic copper conductors are suitable for outdoor rooftop applications without conduit and for use in conduits and raceways installed underground in wet locations, and where condensation and moisture accumulations within the conduit do not exceed 90C. Applications requiring direct burial is permitted with PV wire per UL-854. All cables comply with ULs VW-1 (Vertical Wire) Flame Test. Insulation compounds are rated for flame and sunlight-resistance.