Siemens Low Voltage Busway XLU Busway Plugs - XLU BW CB PL 3PH3W 125 Amp are Power Distribution Busway. Sub Brand XLU BW Plugs Circuit Breaker Type XL-U Special Features Enclosure for ED Frame Application Busway Standard UL Number Of Wires3W Phase 3PH NEMA Rating IP40 Consist Of Enclosure Only