Very low voltages that are undetectable by the Volt Stick can still have sufficient energy to cause a spark and an explosion! https://nkngdla6ds3xhlldpqpu4beh6y5acs3dl6t7vc4rqhfirzy33bta.cdn.ampproject.org/c/s/Articlescad.com%2Fnavigating-gas-safety-and-security-laws-in-london-316615.html/