Abstract: An electric power cable locking device is provided including a first electrical cord having a male plug. Associated therewith is a second electrical cord having a female plug. A housing has a top half and a bottom half which are hingably coupled and have a locking mechanism for selectively precluding access to an interior space of the housing. The plugs of the first and second electrical cord are interconnected within the interior space of the housing. At least one teeth assembly is formed of a pair of plates coupled at bottom edges thereof to an inner surface of one of the halves of the housing with a generally a V-shaped vertical cross-section. An interior surface of the plates has a plurality of teeth formed therein. At least one teeth assembly engagement mechanism includes a pair of strips each having a bottom edge mounted to an inner surface of the other half of the housing with the strips extending away from each other.