Parallax outdoor RV power outlets are ideal for the RVer who stores a motorhome, camper, travel trailer, or pop-up trailer and wants electricity close by. This series of power outlets are constructed of heavy-duty, power-coated steel, with raintight doors.. NEMA 3R raintight enclosure. Unique cover design allows cord to be used while door is closed. Factory wired and assembled. Hub provision is provided for use with Siemens HR-style hubs. Lugs suitable for use with aluminium or copper wire