Underground Feeder Cable. AWG 12/2 UF-B Wire. 2 Solid Insulated Conductors with a Gauge 12 Uninsulated Ground Wire. Bare Copper. Flat Parallel Construction. Color Code: Black, White & Bare Ground. PVC Insulation & PVC Gray Jacket. Temperature Rating -20°C to 60°C. Voltage 600 VRMS Max. Applications: Underground Feeder Wire & Cable Direct Burial.