What type of electrical equipment does WAC specify must be rated for hazardous environments?

The requirement that electrical equipment must be rated for hazardous environments is specified in the Washington Administrative Code (WAC) to ensure safety in locations where there is a risk of fire or explosion due to the presence of flammable gases, vapors, or dust. This regulation is crucial because hazardous locations pose a significant risk, and using equipment that is not specifically rated for such environments could lead to catastrophic failures, fires, or explosions.

Equipment installed in hazardous locations is designed and built to prevent any potential ignition sources from being released into the surrounding area. This includes considerations for materials, construction methods, and operational characteristics that can safely accommodate the specific risks associated with those environments.

On the other hand, standard residential equipment, equipment used in outdoor settings, and low-voltage equipment do not necessarily meet the stringent requirements needed for hazardous environments and are generally designed for different applications that do not involve the same level of risk. This distinction is vital for ensuring that electrical systems function safely and effectively in varying environments, particularly those that are classified as hazardous.