"I-Line™ Busway offers a complete line of compatible, sandwich-type feeder and plug-in busway lengths and fittings." "I-Line plug-in busway has options from 225A to 600A with aluminum or copper conductors." "I-Line busway is constructed with three pole and four pole full neutral configurations for system voltages to 600 volts." "This busway system is rated to allow 100% of the current to flow continuously." "This I-Line plug in unit is for 400A, 600VAC, 3 phase, 4 wire L frame circuit breakers." "This circuit breaker has a G interrupting trip rating." "This unit includes a ground, neutral, and a MicroLogic 3.3 trip unit." "I-Line busway is UL listed and CSA certified."