In some dielectric tests of cables with large cross-sections up to several thousand square millimeters, the conductor must be preheated to a specific temperature by current flow. For this purpose, a current of several thousand amperes must be fed into the conductor for the duration of the test. In order to achieve this, a detachable current-carrying connection is required, which ensures a stable electrical contact and long-term behavior during the test. A contact system was therefore developed to establish the electrical contact to the Milliken conductor on the face side. This is necessary in order to feed the current evenly to the individual strands of the conductor, as these are insulated against each other. The paper presents the patented contact system and the connection geometry as well as the results of a functional temperature-rise test in the laboratory.