Abstract: The invention relates to a method for the alternative connection of an output line (51), connected to a first input line (50), to a second input line (52) by means of at least one isolating strip (10), wherein the isolating strip (10) comprises first contact elements (20) with a first core connection contact (21) and a first contact limb (22) and comprises second contact elements (30) with a second core connection contact (31) and a second contact limb (32), wherein a first and a second contact limb (22, 32) respectively form an isolating contact (40), wherein said first core connection contacts (21) have the first input lines (50) connected to them and said second core connection contacts (31) have the output lines (51) connected to them, wherein an isolating connector (70, 70a) is used to open the isolating contact (40) and hence to break the connection between the first input line (50) and the output line (51), said second input line (52) being connected to the output line (51) via the isolating connector