Hazardous areas are classified according to the type of hazard present, and the level of risk. There are three classifications:  Class 1 – areas where flammable gases or vapours are present in the air in quantities that could create an explosion if ignited  Class 2 – areas where flammable liquids are present in the air in quantities that could create an explosion if ignited  Class 3 – areas where combustible dust is present in the air in quantities that could create an explosion if ignited The electrical equipment in hazardous areas needs to be audited, inspected, repaired and replaced by a licenced EEHA electrician.