Abstract: A terminal block cover provides a cover body having a latch mechanism depending from a side edge of the cover and a hinge mechanism depending from the opposite side edge. The hinge mechanism includes a clip that engages the terminal block's fanning strip, a separable hinge connected between the clip and cover body for permitting removal of the cover body from the terminal block, and a locking device that prevents the cover body from being removed from the terminal block except when it is in a predetermined rotational position on the hinge. The clip provides a prong that engages the fanning strip to index the clip in a fixed position so that the cover body can be reinstalled at the original position. In addition, the clip is held to the hinge mechanism by spring fingers on the hinge pin housing, which cooperate with the locking device to hold the clips in attachment to the cover body even when not installed on a terminal block.