| 摘要 |
A fail safe electrical receptacle ( 1 ) having normally open switches ( 6 ) and normally closed switches ( 7 ). The normally open switches ( 6 ) are wired to a breaker ( 11 ) and are located above the slots ( 2 ) and ( 3 ) while the normally closed position switches ( 7 ) are located below the slots ( 2 ) and ( 3 ). The contact arms ( 18 ) wired to the neutral slot ( 2 ) are neutral while the contact arms ( 10 ) wired to the hot slot ( 3 ) are grounded. If the switch levers ( 9 ) and ( 8 ) located behind the slots ( 2 ) and ( 3 ) are pressed against the normally closed switches ( 7 ), a circuit is not completed and therefore no power is provided to the outlet. However, if the switch levers ( 9 ) or ( 8 ) are pressed against the normally open switches ( 6 ), the circuit between the hot ( 3 ) and the ground ( 17 ) or the ground ( 17 ) and the hot slot ( 3 ) is completed and the breaker ( 11 ) is tripped.
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