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
Caliban in the Coal Mines God, You don't know what it is — You, in Your well-lighted sky — Watching the meteors whizz; Warm, with a sun always by. God, if You had but the moon Stuck in Your cap for a lamp, Even You'd tire of it soon, Down in the dark and the damp. Nothing but blackness above And nothing that moves but the cars … God, if You wish for our love, Fling us a handful of stars! Caliban in the Coal Mines Caliban in the Coal Mines was written by the American poet Louis Untermeyer (1885–1977) and published in his 1914