Abstract: A strain-relief clamp for securely engaging a multi-conductor cable between two relatively movable pieces at a position closely adjacent the connections of the conductors to the terminals of an electrical plug, receptacle, or other wiring device. A first piece includes a hollow, cylindrical shell having an integrally formed, generally semi-cylindrical portion internally of the shell at one end, the wiring device being secured in the other end. A second piece is positioned inside the shell with an arcuate surface opposing an inwardly facing, curved surface of the semi-cylindrical portion of the first piece. A pair of screws pass through openings in the shell and semi-cylindrical portion of the first piece and are threadedly engaged in the second piece.

Abstract: A duplex wall receptacle having ground fault current interrupting capability includes an internal switch operable by manual depression of a button accessible on the front of the receptacle to test the device for proper operation. A blade of conducting material includes a first end portion which is held in contact with, but physically unattached to, one of the terminals to which one of the hot and neutral lines is attached on one side of the fault sensing means. A medial portion of the blade extends laterally across the interior of the receptacle, and a second end portion is positioned in normally spaced relation to a conducting member which is electrically connected to the terminal to which the other of the hot and neutral lines is attached on opposite side of the fault sensing element. Depression of the test button moves the medial portion and second end portion of the blade, placing the latter in contact with the conducting member to simulate a fault condition.