Panelboard Interior Convertible Main Lug Circuit Breaker Series EDB EDG EDJ Amps 125 A Short Circuit Current Rating 100000 RMS Symmetrical Number of Spaces 18 Voltage 277/480YV AC Phase 3 Bus Material Copper Recommended Enclosure 1D687 for Main Lug 6B429 for Main Breaker Circuit Breaker Type Plug In Miniature For Use With NF Circuit Breakers Height 21 in Depth 5 3/4 in Width 10 7/16 in Recommended Flush Cover 3TX77 for Main Lug 3TX81 for Main Breaker