EN 50164-3:2006

This European Standard specifies the requirements and tests for isolating spark gaps (ISG) for lightning protection systems. ISG's can be used to indirectly bond a lightning protection system to other nearby metalwork where a direct bond is not permissible for functional reasons. Typical applications include the connection to -earth termination systems of power installations, -earth termination systems of telecommunication systems, -rail earth electrode of AC and DC railways, -measuring earth electrodes for laboratories, -installations with cathodic protection and stray current systems, -service entry masts for low- voltage overhead cables, -bypassing insulated flanges and insulated couplings of pipelines.