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 - GHB/GBH; Branch Breaker Mounting - Bolt-On; Circuits - 72; Box/Trim Size - 20 in. x 72 in.; Additional Information - Main Lug Size: (2) 2-250 MCM or (1)2-500MCM, I.C. Rating: 10 kA; Manufacturer Series - Pow-R-Line C 2a Additional Info: Main Lug Size: (2) 2-250 MCM or (1)2-500MCM, I.C. Rating: 10 kA