Abstract: A retaining device retains a pair of electrical power cords, one cord having a plug which is joined to a socket of the other cord. The device has first and second receptacles, each with a first open end and a second open end, and an opening extending from the first open end to the second open end. The first open end, the second open end, and the opening extending from the first open end to the second open end of the first and second receptacles together form a space for receiving the ends of the power cords, including the plug and socket. The first receptacle inserts into the second receptacle to adjust the overall length of the retaining device and locks in place to retain the ends of the pair of power cords and the plug and socket coupled to each other. The first receptacle is turned to release it from the second receptacle in order to remove the coupled ends of the power cords.