4 in. Square Cover, Exposed Work, 2.141 in. dia. 30-50A Receptacle. RACO exposed work covers include required hardware for mounting the receptacle(s). RACO exposed work covers meet the requirements of the 2014 NEC Article 250.146(A). No bonding jumper is required for covers with: (1) Crushed corners. Hardware and cover are packed in a poly-bag with printed catalog number, compliances and installation instructions. cULus Listed.