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
Great New York City Fire of 1845 the explosion was debated in the days immediately following the fire. Public speculation led to the arrest of Crocker and Warren, the occupants of the warehouse. The Daily-Tribune reported that the explosions could not have occurred without the presence of gunpowder in addition to the saltpeter, and thus they were suspected of possessing gunpowder, which would have led to a murder charge. However, later inquiry released Crocker and Warren of all charges as no evidence of gunpowder was discovered. There was some speculation that the explosion had been caused by the NY Gas Light Co.'s gasometer house, but Chief Engineer