NEMA L14-30R Generator Connector, 30A, 125/250V L14-30R Female Cord End Heavy Duty Nylon 4 Wire Connector Rated for 30A, 125/250V, UL and CSA Listed Mates with an L14-30P Plug or L14-30P Inlet Found on a Transfer Switch Inlet Box NEMA designation, amperage, voltage and certification molded on face of device