SL323RG, 100 amp, 240 volt, 3 phase, 3 wire, with ground, fusible style bus plug, type BEL / SL, UL Listed assembly, complete with UL Recognized internal switch and components, suitable for use with OEM Spectra Low-Amp Series industrial busway systems, accepts Class H, R and J fuse types, direct substitute, fit and function for OEM SL323RG, SL323RGR, SL323RGJ