In an open-top spray booth, which vertical distance above the booth is considered a Class I, Division 2 location?

In the context of electrical installations and hazardous locations, Class I, Division 2 environments are defined by the presence of flammable gases or vapors that may escape under normal operating conditions but are not likely to be present during regular use. In an open-top spray booth, the classification extends above the booth to a certain height where the potential for hazardous materials to become airborne necessitates caution regarding electrical equipment.

The correct vertical distance above the booth that is recognized as a Class I, Division 2 location is 915 mm, or 3 feet. This height is significant because it indicates the zone where flammable vapors may be present, and thus where precautions must be implemented to minimize ignition risks.

Electrical equipment located in this area must adhere to specific standards for safety, designed to mitigate the hazards associated with flammable materials. Knowing these classifications is essential for ensuring that appropriate electrical installations and equipment are used in environments where flammable gases and vapors are a risk. Understanding the specifics of hazardous location classifications is crucial for anyone involved in electrical contracting and safety in such environments.