Objects in the area where the overhead contact line breaks that do not have sufficient short-circuit current carrying capacity put people and installations at risk. These conductive bodies, e.g., metal boundaries or fences, must be equipped with an additional, sufficiently dimensioned conductors. This is done using a short-circuit wire. It is installed on fences or boundaries and triggers a defined short-circuit in the event of a broken overhead contact line. Short-circuit wires are also used in tunnel building and for noise barriers. The necessary installation accessories, like the press connector and conductor holder, round off the full package.