Panelboard Interior, Convertible, Main Lug, Circuit Breaker Series EDB, EDG, EDJ, Amps 600 A, Short Circuit Current Rating 100000 RMS Symmetrical, Number of Spaces 30, Voltage 277/480YV AC, Phase Three, Bus Material Copper, Recommended Enclosure 12N640 for Main Breaker, 1D700 for Main Lug, Circuit Breaker Type Bolt-On, For Use With NF Circuit Breakers, Height 46 in, Depth 5 3/4 in, Width 10 7/16 in, Recommended Flush Cover 3TX94 for Main Breaker, 4HHA2 for Main Lug