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
There once was a man from Nantucket There once was a man from Nantucket "There once was a man from Nantucket" is the opening line for many limericks, in which the name of the island of Nantucket creates rhymes and puns, often obscene. The protagonist in the obscene versions is typically portrayed as well-endowed and hypersexualized. The opening line is so well known that it has been used as a stand-alone joke, implying upcoming obscenities. The earliest published version appeared in 1902 in the "Princeton Tiger" written by Prof. Dayton Voorhees: Other publications seized upon the "Nantucket" motif, spawning many sequels Among the most well known are: