A new type of switching mechanism for a ground fault circuit interrupter (GFCI) with reverse wiring protection preferably includes two pairs of fixed contact holders, each member of each pair having at least one fixed contact at one end; a pair of movable contact holders, each having an end having one...http://www.google.ca/patents/US6954125?utm_source=gb-gplus-sharePatent US6954125 - Ground fault circuit interrupter with reverse wiring protection
