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
Butte Fire Sacramento Judge Allen Sumner ruled that because "...the Butte Fire was caused by a public improvement as deliberately designed and constructed by Pacific Gas and Electric Company," the company is liable for all property damages caused by the fire. Butte Fire The Butte Fire was a rapidly moving wildfire during the 2015 California wildfire season that started on September 9 in Amador County, California. The fire burned . The fire started at 2:26 P.M. on Wednesday, September 9, just east of Jackson, when a tree came into contact with a power line, and quickly grew to over by that evening.