A modular wiring system includes a junction box having a plurality of ports and a programmable wiring board carrying electrically conductive elements. A plurality of cable receiving connectors are each insertable into a corresponding one of the plurality of ports of the junction box and each provides electrical coupling between wires of a cable and the electrically conductive elements of the programmable wiring board. At least one electrical device receiving connector is coupled to the programmable wiring board. The at least one electrical device receiving connector releasably receives an electrical device and provides electrical coupling between the electrical device and the electrically conductive elements of the programmable wiring board.