the shafts 80 and 90 through the passage way created by the alignment or registration of the through holes of the obstructing member 50 outer disk 60 and inner disk 70 fig4 shows an internal arrangement of the grounding switch interlock ground switch linkage 142 couples to the grounding switch on the right most portion and to the large gate wheel 144 pivotally on the left hand side the large gate wheel 144 is coupled fixedly to the small gate wheel 148 through a coupling member such as a shaft 146 the small gate wheel 148 is pivotally coupled to the ground gate member 149 thereby when the grounding switch is deactivated a leftwards linear motion is imparted on the ground switch linkage 142 which rotates the large gate wheel 144 causing the small gate wheel 148 to rotate in a counterclockwise direction imparting a downward linear motion on the ground gate member 149 as seen in fig5 the ground gate member 149 is then displaced downwards to restrict travel of the locking pushrod member 24 as seen in fig1 on an outer face of the enclosure 130 the lever handle 22 of the receptacle 20 has a cam type surface which engages the handle locking pushrod 24 when a user would attempt to unlock the lever handle 22 the cam surface abuts against the locking push.