AC463RG, 100 amp, 600 volt, 3 phase, 4 wire, with ground, fusible style bus plug, type BEC / AC, UL Listed assembly, complete with UL Recognized internal switch and components, suitable for use with OEM Armor Clad industrial busway systems, accepts Class H, R and J fuse types, direct substitute, fit and function for OEM AC463RG, AC463RGR, AC463RGJ, AC1463RG, AC1463RGJ