Abstract: A contact apparatus having at least one conductive, elastic, structured contact unit that may assume a first state and a second state and may be brought by supplying energy, such as pressure, from the first state into the second state, is provided for a particularly rapid and simple electrical contacting with a ground potential of cable shields of electrical cables with different diameters. The contact unit is configured so that, in the first state, the contract unit has a preparation for detachably inserting a plurality of electrical cables, and that, in the second state, the contract unit fixes the cables and establishes an electrical contact with the cable shields of the cables.