Abstract: Contact device for achieving an electric conducting connection between a metallic plate and another metallic object, for instance between a plug-in unit and a rack, where a connection plate fastened to the metallic plate has on one side edges known per se and is so bent that the edges, when the contact device is inactive, are withdrawn inside the surface of the metallic plate facing the metallic object, and that the edges, owing to pressure from a fastening element inserted through the contact device, can be brought to protrude from the surface of the metallic plate.

Abstract: A connecting device for connecting an electric wire to a bus bar, with a groove between two walls which form together a U-shaped section, characterized in that, a connecting piece has two inwardly sloping connecting surfaces to be pressed towards the edges of the U-shaped section and a screw through a central hole formed in the connecting piece, which is intended to engage with its thread in the insides of the walls of the U-shaped section when the connecting piece has been placed over the groove. The connecting piece also has two guiding prongs, on opposite sides of the screw which are intended to be inserted into the longitudinal groove of the bus bar.