SIEMENS LOW VOLTAGE PL SERIES LOAD CENTER. FACTORY INSTALLED MAIN BREAKER WITH 54 1-INCH SPACES ALLOWING MAX 70 CIRCUITS. 3-PHASE 4-WIRE SYSTEM RATED 120/240V OR 120/208V (225A) 22KA INTERRUPT. SPECIAL FEATURES COPPER BUS, INTERCHANGEABLE MAIN, GRAY TRIM, NEMA TYPE1 ENCLOSURE FOR INDOOR USE.