Panelboard Interiors: Type - Lighting/Distribution Panel; Rating - Volts - 240VAC; Service - 3-Phase 4-Wire; Main Feed - Lugs; Rating - Amps - 400; Bus Material - Aluminum; Branch Breaker Type - BAB/DNBA/GFCBB/QBHW/HBA; Branch Breaker Mounting - Bolt-On; Circuits - 42; Box/Trim Size - 20"X54" (508x1372mm); Manufacturer Series - POW-R-LINE C 1a