(under subclass 314) Systems wherein the circuit controlling switches for closing the circuit from the source of supply to the load device circuits are electrically controlled or operated switches, the pre-selectable switches being connected in the circuit of the electrically controlled or operated load device circuit switches and serving to select the electrical switch controller or operator to be energized, and thereby to select the load device circuits which are to
be energized.
SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnection Systems,
38+, for switching systems of general application for controlling two or more load device circuits.
361, Electricity: Electrical Systems and Devices,
139+, for relay switching systems of general application.
