Switching assembly having an interlock device for a selector switch

A switching assembly having an interlock device (30) for a selector switch (40) is provided. The interlock device (30) includes a flapper member (74) rotatably coupled to a base member (70). The flapper member (74) has an aperture (164) disposed proximate to an aperture (22) of a panel (20) such that the selector switch (40) extends through the apertures (164, 22). The flapper member (74) further includes an indented region (170) and has a first operational position proximate to the panel (20) and a second operational position disposed outwardly from the panel (20). When an arm portion (224) of the selector switch (40) is disposed within the indented region (170) of the flapper member (74) at the second rotational position and the flapper member (74) is rotated to the second operational position, then the arm portion (224) cannot be rotated outside of the indented region (170).