Square D by Schneider Electric QO Plug-On Neutral 225 Amp Main Lugs Only 42-Space 42-Circuit Indoor Load Center with Cover and Ground Bar Engineered for a quick Plug-on Neutral breaker connection on every circuit, fewer connections, faster installation, no pigtails frees up gutter space Includes an indoor cover, (2) PK15GTA ground bars and is convertible to a main breaker load center with a QOM2 main breaker (sold separately) Accommodates plug-on secondary surge arrestor (sold separately) Overhead/underground feed simply by rotating the device before installing Single phase; Rated 120/240 VAC and 65,000 AIR short circuit current rating