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
Whitehaven haulage. William Brownrigg, Whitehaven's most eminent scientist, was the first to investigate the explosive mine gas fire damp. The Lowthers' technological advances continued when their chief steward, Carlisle Spedding sunk Saltom Pit in 1729. Saltom Pit was the second pit to be sunk beneath the sea. At Saltom Pit, Carlisle Spedding pioneered the use of explosives in sinking shafts. He also invented the first form of 'Safety Lamp', it was called the Spedding Wheel or Steel Mill. On occasions the Spedding Wheel caused explosions or fires but it was a major improvement over the naked flame. Saltom Pit was constructed