Signal & Data Protection Radio & CCTV Spark Gaps Earth Bar Menu Signal & Data Protection Radio & CCTV Spark Gaps Earth Bar SPARK-GAP TYPE KFSU 100kA (8/20) spark gap designed specifically for bonding metal structures and earth mats. Manual SPARK-GAP TYPE EXFS L 300 50kA (10/350) or 100kA (8/20) spark gap designed specifically for bonding in hazardous environments and used in cathodic protection. Manual Isolating Spark Gap KFSU 100kA (8/20) Isolating Spark for bonding isolated earthing systems under lightning conditions Manual