Building Wire; Type XHHW; Voltage Rating 600 V; Current Rating 335 Ampere (75 Deg C); Conductor Material Annealed Copper; Conductor Size 400 KCMIL; Stranding 37 Strands; Insulation Material Cross-linked Polyethylene; Insulation Color Black; Outer Diameter 840 Mil; Length 1000 Ft; Temperature Rating 90 Deg C (Dry), 75 Deg C (Wet); Weight 1315 Lb/MFt; Package Type Reel; Approval UL 44; Applicable Standard ICEA S-66-524, NEC 310; Insulation Thickness 65 Mil; Application Power Distribution and Branch Circuits in Residential, Commercial and Industrial Building