This quick-make, quick-break unit is designed to plug into Square D I-Line and I-Line II busways. Its enclosure design helps to keep personnel safe from hazardous components while also preventing the ingress of solid foreign objects such as falling dirt. This listing is for each. Product Specification Brand Square D Catalog Description Square D, Busway CB Plug-In 60A, FA Frame, 120 V AC-208 V AC, 3-Phase, 4-Wire + Ground, Busway Circuit Breaker, I-Line II 00785901018391 Item Status D Mfr. # PFA32060GN NEMA Rating 120 V AC-208 V AC Number of Wires 4 Phase 3 Sub-Brand I-LINE II Type F-FRAME, SECTION, THERMAL MAGNETIC CIRCUIT BREAKER : 60 A