Panelboard Interiors: Type - Lighting/Distribution Panel; Rating - Volts - 208/120VAC; Service - 3-Phase 4-Wire; Main Feed - Lugs; Rating - Amps - 100; Bus Material - Copper; Branch Breaker Mounting - Bolt-On; Circuits - 18; Box/Trim Size - 20 inX30 in (508x762mm); Manufacturer Series - POW-R-LINE C 1a