Effective illumination in mines and hazardous areas is all about one thing: safety first. In areas made hazardous by abnormal conditions including the presence of flammable vapours, gases or combustible dust, specialty lighting is key to the performance of day to day tasks.
Mine sites, industrial areas, chemical processing, grain silos and storage: the areas where zone-specific lighting standards are applicable are broad.
It is therefore important to note two things:
Emergency lighting is illumination designed to operate when ordinary illumination is missing especially in the case of where there is a compromise to power supply, dangerous conditions, or life threatening situations.
Emergency lighting must be designed and fitted to allow the evacuation of people in case of danger, or more simply, to allow operators to move in case of electrical failure and black out. In systems installed in areas with the presence of a potentially explosive atmosphere, this type of system has several further critical issues compared to a system installed in a safe area.
Emergency lighting is classified, depending on the purpose, as: