Abstract: An apparatus for producing electrical wiring constituted by at least one wire inserted in a corresponding receptacle of a connector provided with at least one corresponding electrical terminal, that comprises: a region for loading wires in corresponding preset seats, selected among a plurality of seats formed on a holder comb; a device for moving the holder comb from the loading region to a region for the insertion of the wires in preset receptacles of one or more preset connectors; a device for the guided translational motion of the ends of the wires within the preset receptacles of the preset connectors; and a programmable electronic device adapted to match, in the insertion region, a preset seat of the holder comb with a preset receptacle of a preset connector.