Load Center Number of Spaces 54 Amps 225 A Voltage 120/240V AC Circuit Breaker Type QO Included Enclosure Cover Combination Flush/Surface Cover Main Circuit Breaker or Main Lug Main Lug Max No of Tandem Breakers 18 Phase 1 Height 39.38 in Width 14.25 in For Use With Square D QO Circuit Breakers Bus Material Tin Plated Copper Short Circuit Current Rating 65 kA Enclosure NEMA Rating 1 Recommended Flush Cover Included Recommended Ground Bar Kit Included