Patent ID: 8305736

Claim:
A subunit for a motor control center comprising: a housing constructed to allow access to a supply bus, the housing having a front panel moveable between a closed position and an open position; a plurality of conductive contacts disposed within the housing and configured to extend outside the housing to engage the supply bus; a rotary shaft disposed within the housing and configured to linearly translate the plurality of conductive contacts from a first position to a second position when the subunit is positioned within the motor control center and the front panel of the subunit is in the closed position, wherein the plurality of conductive contacts are disengaged from the supply bus in the first position and engaged with the supply bus in the second position; and a plate moveable between a first position and a second position, the plate having an opening therein that permits access to the rotary shaft from outside the housing when the plate is in the first position and blocks access to the rotary shaft from outside the housing when the plate is in the second position; and wherein the plate engages the front panel to lock the front panel in the closed position when the plate is in the first position.