Busway Plug In Unit, Amps 400, Voltage 240/600VAC, Number of Poles 3, Fusible, 3 Phase, 4 Wire with Ground, Enclosure Rating NEMA 1, Fuse Class H, K, R, Breaker Type PBQ, For Use With I-Line and I-Line II Busway, Height 42 In., Width 21 In., Depth 13-3/4 In., Standards UL Listed, CSA Certified