Bus plug door interlock

An improved bus plug door interlock for use with a bus plug in conjunction with an electrical power busway distribution system is described. The bus plug includes the bus plug door (106) interlock, a door, a housing (102) and an electrical switch. The bus plug door interlock prevents the bus plug door from opening when the electrical switch is in the "on" position and prevents the power from being turned "on" when the door is open. The bus plug door interlock includes a door interlock pivot (206) with a single flat surface (232) and an elongated slot (230) with a narrow and a wide section. When the door interlock pivot is in the narrow section of the elongated slot, the single flat surface engages the narrow section of the elongated slot, preventing the electrical switch from being turned "on". When the door interlock pivot is in the wide section of the elongated slot, the door interlock pivot can rotate freely, allowing the electrical switch to be turned "on". Additionally, the single flat surface prevents the electrical switch from being turned "on" when the door is partially open.