Constructed of G90 galvanized steel, this 50/30/20 Midwest post-mount surface box is finished with a gray polyester powder-coated paint that is baked on and NEMA 3R rated for outdoor use. The ring-type meter socket is rated at 100 amps. The rolled-edge receptacle door swings up and open and can be locked. Units come factory wired and are assembled with breakers and receptacles installed. This unit does not have loop-fed lugs. Canada cUL approved.