Abstract: A lighted adapter for use in an electrical system which includes a male connector and a mateable female connector connectable in a given line circuit. The connectors include complementary interengaging terminals. The adapter includes a housing having a female end for mating with the male connector and a male end for mating with the female connector. An electronic package is located within the housing and includes adapter terminals for engagement with the terminals of the connectors when the housing is mated between the connectors, whereby the electronic package is electrically coupled to the line circuit through the adapter. A light source is provided in the housing and coupled in the circuit therethrough. A light transmitting lens is associated with the housing and arranged in proximity to the light source to provide external viewing of a lighted condition of the light source and, thereby, a line circuit condition through the adapter.

Abstract: A capacitor unit including a capacitive element connected in parallel with a discharge resistor is provided with a switch in series with the resistor. This switch responds to power frequency current flowing through the capacitive element such that it opens to remove the discharge resistor from the circuit when power frequency current is flowing through the capacitor unit and closes when power frequency current stops, thus reinserting the discharge resistor to eliminate any residual charge remaining on the capacitive element.