Abstract: An example lock out device includes a plug of electrically insulating material and a hinged bracket to receive the plug. The plug includes a cap and a threaded portion to threadedly engage with a threaded opening of a fuse holder. The hinged bracket includes a first section having a base with a first opening and walls forming a first cavity to permit the threaded portion of the plug to pass through the base portion, and a second section having a lid and walls forming a second cavity. The first and second sections are moveably connected via a hinge to enable movement of the first and/or second section relative to each other between an open position and a closed position. When the hinged bracket is closed a first eye and a second eye are aligned to enable a locking element to pass through both the first and second eye.