In hazardous locations, what must be true about the boxes used?

In hazardous locations, it is essential that the electrical boxes used are constructed for the specific hazardous classification. This requirement is crucial because hazardous locations are defined by the potential presence of flammable gases, vapors, dust, or fibers that can pose a risk of fire or explosion. Therefore, the materials and design of the boxes must be tailored to adequately contain any potential hazards and prevent any ignition sources from initiating an incident.

These boxes are typically made from specific materials that are resistant to corrosive substances or capable of preventing the escape of ignitable gases. Additionally, they often require special sealing and entry fittings to maintain the integrity of the enclosure and prevent external elements from entering. This construction ensures compliance with safety standards and regulations set forth in the National Electrical Code, which seeks to protect both people and property in environments where hazardous materials may be present.