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
2012 Jersey gas holder fire gas leak on the side of the holder", who were using electric tools. During this, the leaking gas ignited. The fire spread and "attacked" the joints of the holder, which caused more gas to leak out and ignite, resulting in a larger and more intense fire. Furthermore, Jersey Gas admitted to not carrying out risk assessments, not providing "a safe system of work" and providing inadequate health and safety training to its employees. An area of St Helier was evacuated and cordoned off soon after the fire started. Seven near-by schools were also evacuated. Many residents who live in houses