Abstract: A moisture barrier is molded and/or glued around an exposed section of a conductor where a surrounding insulation layer is removed. A gap between the conductor and a surrounding insulation layer consequently terminates at the moisture barrier and moisture is prevented from creeping any further. The moisture barrier is preferably integrated in a wick dam of a test cord utilized in a telephone line-testing device. A strain relief bridge may be crimped with two metal sleeves on the remaining insulation layer laterally on both sides of the moisture barrier to bridge eventual external forces across the moisture barrier.