Patent ID: 7315227

Claim:
A circuit interrupting device containing a line side connection capable of being electrically connected to a source of electricity; a load side connection capable of being electrically connected to a load side conductor; and a user accessible load; wherein said circuit interrupting device comprises: a housing; a circuit board; a trip apparatus capable of tripping said circuit interrupting device to cause electrical discontinuity between said line side connection, said load side connection, and said user accessible load when a fault occurs; a reset button; and a two-level test button; wherein when said circuit interrupting device is properly wired or powered, depressing said two-level test button activates a first-level test button which generates a leakage current to test whether components of said circuit interrupting device are working properly; wherein when said components of said circuit interrupting device are functioned properly, said reset button can be reset; wherein when one or more of said components of said circuit interrupting device are not functioned properly, said reset button cannot be reset; and wherein when said circuit interrupting device is not properly wired or powered, depressing said two-level test button does not activate said first-level test button, but a further depression of said two-level test button activates a second-level test button which mechanically trips said circuit interrupting device.