The Square D 125 Amp Residential Ring Type Meter Socket surface mounts to provide for a single electric meter. It accomodates multiple wiring configurations for overhead and underground service feed. This equipment features a top end-wall A-Sized hub provision and a bottom end-wall 2 in knockout. The meter main uses an aluminum bus, is single phase, three wire, and features a NEMA 3R rated enclosure for outdoor use. This unit if ANSI certified and UL listed for use as service entrance equipment with a maximum load of 600 VAC.