A terminal block cover includes a base having a base surface configured to be secured against a terminal block. First and second spaced apart sidewalls extend from and adjoin the base. An outer wall is spaced apart from the base and is secured to the base by and adjoins with the first and second sidewalls. A lateral wall is arranged at a first lateral side and extends between and adjoins the first and second sidewalls, the outer wall and the base, which together provide at least one terminal pocket. An inner surface is provided on the outer wall facing the terminal pocket and has first and second surfaces. The first and second surfaces are at first and second distances respectively from the base surface, and the first distance is greater than the second distance. The second surface retains a terminal nut.