The Square D® QO Load Centers and Combination Service Entrance Devices, QC816F150C. Enclosure mounting style performed as surface mount or convertible to semi-flush (use appropriate flange kit). This HOM Ringless Meter Mains meets Federal Specification W-P-115c as Type 1, Class 2, are UL Listed, suitable only for use as service equipment. In interior single main service disconnect with feed-thru lugs.