Perfect for the RV Owner that stores a motor home, camper, travel trailer or pop-up trailer and wants electricity close by, especially for a heater that will help prevent moisture and mildew from forming. Panel includes a 50 Amp receptacle and branch circuits: Single-Pole 20 Amp and Double-Pole, 50 Amp as well as a 20 Amp GFCI duplex receptacle. Safe and easy to install for the do-it-yourselfer because it is factory wired and completely assembled. The unique cover design allows the cord to be used when the door is closed. Some handled cords may not allow the door to fully close. 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, some handled cords may not allow the door to fully close Lugs are suitable for either aluminum or copper wire