US Patent 7869173 Bi-directional GFCI

A bi-directional fault circuit interrupter comprising a first connection interface, a second connection interface, at least one fault circuit, and at least one switch which is movable from at least one first position to at least one second position to selectively electrically connect the fault circuit to either the first connection interface or the second connection interface. There are also a plurality of conductors configured to electrically connect the first connection interface to the switch and the second connection interface to the switch.