Abstract: A low voltage buried wire isolator for interrupting the metallic path between the common grounding system in a structure and the positive grounding system of the telephone or television cable grounding systems. The isolator comprises a housing having an electrically conductive clamping assembly clamped to the metal ground sheath of the service cable. A high voltage protector such as a gas tube is electrically connected, at one of its ends, to the clamping assembly and is designed to normally prevent the flow of electrical current therethrough which is below a predetermined value. A metal fitting is connected to the other end of the high voltage protector and is operatively electrically connected to at least a pair of signal circuit protectors also mounted within the housing. If a power crossover should occur, the high voltage protector prevents the metal ground sheath from overheating since it is electrically insulated from the cable protective apparatus.

Abstract: A low voltage buried wire isolator for interrupting the metallic path between the common grounding system in a structure and the positive grounding system of the telephone or television cable grounding systems. The isolator comprises a housing having an electrically conductive clamping assembly clamped to the metal ground sheath of the service cable. A high voltage protector such as a gas tube is electrically connected, at one of its ends, to the clamping assembly and is designed to normally prevent the flow of electrical current therethrough which is below a predetermined value. A metal fitting is connected to the other end of the high voltage protector and has an electrically conductive wire secured thereto which extends to the existing cable protective apparatus. If a power crossover should occur, the high voltage protector prevents the metal ground sheath from overheating since it is electrically insulated from the cable protective apparatus.