KINGWIRE Triplex Type RHH or RHW-2 or USE-2 Secondary UD is constructed with 8000 Series Aluminum Alloy Conductors. Cross-linked polyethylene insulation (XLPE) abrasion, impact and sunlight resistant. Sequential foot markings for easier inventory control management. KINGWIRE’s triplex type RHH or RHW-2 or USE-2 is primarily used for secondary distribution and underground service at 600 volts or less, either direct burial or in ducts.