XHHW cables are primarily use for power distribution. XHHW cables may be used in wet or dry locations, with ambient temperatures not exceeding 90 C. Voltage rating for RW90 cable is 600V.
4/0 AWG XHHW Aluminum Cable Applications
Primarily used for overhead service application such as street lighting,outdoor lighting,and temporary service for construction, To be used at voltage of 600V to 2200V phase-to-phase or less at conductor temperatures not to exceed 75°C for polyethylene insulated conductors or 90°C for cross liked polyethylene insulated conductors.
4/0 AWG XHHW Aluminum Cable Conductors:
4/0 AWG XHHW Aluminum Cable Standards