In the international standard classification, high voltage spark involves: Aerospace electric equipment and systems, Aircraft and space vehicles in general.
SAE - SAE International, high voltage spark
SAE AS293-1954 Spark Plug-Spring Contact for High Voltage
Society of Automotive Engineers (SAE), high voltage spark
SAE ARP489A-1962 Leads, Shielded, High Tension, Detachable Spark Plug