Panelboard Interior Convertible Main Lug Circuit Breaker Series EDB EDG EDJ Amps 400 A Short Circuit Current Rating 100000 RMS Symmetrical Number of Spaces 30 Voltage 277/480YV AC Phase 3 Bus Material Aluminum Recommended Enclosure 12N640 for Main Breaker 1D700 for Main Lug Circuit Breaker Type Plug In Miniature For Use With NF Circuit Breakers Height 46 in Depth 5 3/4 in Width 10 7/16 in Main Circuit Breaker Adapter Kit 22P071