SIEMENS LOW VOLTAGE POWER MOD WB STANDARD CIRCUIT BREAKER MAIN. 3-PHASE 4-WIRE SYSTEM RATED 240V (400A) 100KAIC INTERRUPT. SPECIAL FEATURES NEMA TYPE 3R ENCLOSURE, OH/UG SERVICE FEED. 400A 3-POLE JXD6 FRAME BREAKER INCLUDED (HJXD63B400). FACTORY INSTALLED LUGS.