Abstract: A protector for an electrical receptacle. A flat housing has a stepped cylindrical bore communicating from the front of the housing to the rear. A cover including a disc bearing slots fits closely yet rotatably into the larger of the two steps. The slots are configured to correspond to, but to be slightly smaller than, openings formed in a receptacle, so that conductive prongs of a plug may be inserted through the cover into the receptacle. The cover is rotated such that its slots align with those of the receptacle when it is desired to connect a plug to power. The cover may be rotated to misalign the respective slots for safety. When the protector is attached to the front of a receptacle, the smaller step of the bore serves as a stop entrapping the cover in the bore, the receptacle blocking escape of the cover at the other end of the bore. The larger step of the bore is long enough to enable the cover to move axially therein.