Busway Plug In Unit, Amps 60 A, Voltage 277/480/600V AC, Number of Poles 4, 3 Phase, 4 Wire with Ground, Enclosure Rating NEMA 1, For Use With Square D I-Line and I-Line II Busway, Fusible Yes, Fuse Class H, K, R, Breaker Type PQ, Height 8 7/8 in, Width 15 in, Depth 4 21/32 in, Standards CSA Certified, UL Listed