Busway, I-Line, plug in, tap box, 400A, 600A, 3 phase, 3 wire, integral ground bus

SQUARE D PBTB306G SQUARE D BUSWAY PLUG-IN TAP BOX 3-PHASE 3-WIRE 50 CAPACITY INTEGRAL GROUND BUS 600 A-400 A 600 V AC ALUMINUM AND COPPER BUSWAYS BUSWAY TAP BOX I-LINE