Connector apparatus adapted for the direct plug-in connection of conductors

An electrical connector arrangement includes a resilient contact adapted for direct engagement with the bare wire of an insulated conductor without the use of any assembly tool, characterized in that the resilient contact includes a first leg having a first end containing a window opening, a second leg having a first end extending at an acute angle through the window opening for clamping engagement with a conductor bare wire that is also inserted in the same direction therein, and a connecting portion connecting the other ends of the first and second legs to define a closed loop. A clamping edge at the extremity of the first end of the second resilient contact leg engages the bare wire and cooperates with a first edge of the window opening to prevent the withdrawal of the bare wire from the window opening. A conductive bus bar may be provided that includes a projecting portion that extends into the window opening between the bare wire and the window first edge, whereby the bare wire is clamped between the clamping edge of the second leg of the resilient contact and the bus bar projecting portion.