An electrical enclosure for an electrical device or instrument includes an enclosure body defining an interior that receives the electrical device or instrument, the enclosure body including a back wall. A mounting foot is disposed outside the enclosure body and attached to the back wall. The mounting foot includes a generally planar body defining a mounting fastener opening that receives a fastener to secure the mounting foot to a wall or other support structure. A panel fastener is attached to and extends forward from the mounting foot, through the back wall, and into the interior of the enclosure body. The panel fastener is used to secure an internal panel to the enclosure body within the interior of the enclosure body.