Connecticut Electric CESMPSC55GRHR 50-Amp RV PNL with 20-Amp GFCI Receptacle 14-50R NEMA receptacle is 4 wire, rated at 50-Amp 125/250-Volt; 5-20R NEMA 3 wire receptacle is GFCI protected Hub provision is provided for use with Siemens HR-style hubs NEMA 3R rainproof enclosure has a lockable latch and the unique design allows the cord to be used with the door closed Lugs are suitable for either aluminum or copper wire