Busway Plug In Unit Amps 150 A Voltage 277/480/600V AC Number of Poles 3 3 Phase 4 Wire with Ground Enclosure Rating NEMA 1 For Use With Square D I-Line II Busway Fusible No Breaker Type HD Height 20 21/64 in Width 8 1/2 in Depth 8 in Standards CSA Certified UL Listed