What class and division is designated for locations with sufficient quantities of combustible dust present in the air?

The classification of locations with potentially explosive environments is outlined by the National Electrical Code (NEC), which categorizes these areas based on the materials present and their characteristics. For locations that contain sufficient quantities of combustible dust in the air, the appropriate classification is Class II Division 1.

In this classification, Class II indicates environments where combustible dust is present, which can create hazards if ignited. Division 1 refers to areas where the dust is in suspension in the atmosphere under normal operating conditions. This means that dust can accumulate, and in certain situations, it can become airborne and create an explosive atmosphere.

Understanding this classification is crucial for ensuring that the proper safety measures and explosion-proof equipment are utilized in areas where combustible dust is a concern. This helps prevent accidents and ensures the safety of both personnel and equipment in such hazardous locations.