A panelboard is constructed with a line terminal array in a row midway between mechanical parallel elongated support means for the circuit breaker load ends. Disposed outboard of and extending parallel to each support means is an elongated neutral bar having a plurality of load wire grips thereon. Main lugs for energizing the line terminal array are disposed at one end thereof, and at the other end thereof a connecting bar extends between the neutral bars for an electrical interconnection therebetween.