Siemens SpeedFax™ P1X42MC250CT Type P1 Panelboard Interior, 120/208 VAC, 250 A

Type P1 unassembled panelboards are completely convertible from main lug to main breaker and vice-versa. Additionally feed-thru lugs or a subfeed circuit breaker up to 400 amperes can be added without increasing the box height.