Abstract: A locking electrical plug 1 includes a plug body 8 and a securement arm 18 residing in a securement arm slot 32 located in the flat of a power blade 16. The securement arm 18 is normally biased orthogonal to the flat of the power blade 16 by a biasing member 20. The securement arm 18 includes a securing nib 25 capable of mating with the biasing member 20. In the normal locked position, the securing nib 25 is not mated with the biasing member 20 causing the securement arm 18 to extend orthogonally outward from the securement arm slot 32. When the securement arm 18 is slid along the major axis of the power blade 16 towards the unlocked position, the biasing member 20 and the securing nib 25 mate such that the securement arm 18 lies in the flat of the power blade 16. A shaft 14 is positioned in the plug body 8 and allows a user to control the locked/unlocked characteristics of the locking electrical plug 1. In one embodiment a spring 15 acts to position the securement arm 18 in the normal locked position.