Electrical equipment in hazardous areas the participation of operations, maintenance, safety, electrical and instrumentation professionals, the use of process diagrams and material flows, MSDS and any pertinent documents, information and knowledge to determine the hazards and their extent and the countermeasures to be employed. Area classification documentations are reviewed and updated to reflect process changes. Soon after the introduction of electric power into coal mines, it was discovered that lethal explosions could be initiated by electrical equipment such as lighting, signals, or motors. The hazard of fire damp or methane accumulation in mines was well known by the time electricity was introduced, along with the
2014 Kaohsiung gas explosions by the gas explosions, despite their bodies having yet to be found. The prosecutors said that rescuers could not find the bodies and suspected that they might have been vaporized from the explosions. On 8 August, another gas leak was reported in Cianjhen District shortly before 7:50 a.m causing widespread panic among residents. People who lived within 150 meters radius of Kaisyuan 3rd Road were evacuated the city police department to Kaohsiung Municipal Guanghua Junior High School and Le Chyuan Elementary School, raising concern among residents over their safety. Authorities tried to pin down the source of the gas and