Panelboard, 400a, aluminum, 42 cct, three-phase, main lug only, four-pole Specifications Item Name Panelboard Interior Amperage Rating 400 A Phase 3 Breaker Type Main Lug Only Number of Circuits 42 Dimensions 16 in L x 6-1/2 in W x 42 in H Number of Poles 4 Material Aluminum Application For Electrical Assemblies, Panels and EOEMs UPC 621037082755