Which class of locations pertains to combustible dusts?

The classification that pertains to combustible dusts is Class II Locations. These areas are characterized by the presence of combustible dust that can create hazardous conditions when mixed with air. The National Electrical Code (NEC) defines Class II Locations specifically for locations where combustible dust is present in sufficient quantities to pose a risk of explosion or fire.

In Class II environments, the dust can settle on electrical equipment and other surfaces, creating an ignition risk due to potential arcing, sparks, or overheating. Therefore, the electrical equipment used in these locations must be specifically designed to prevent ignition and should be protected against the accumulation of dust.

This classification emphasizes the need for proper regulations and safety measures when working in environments where combustible dust is a concern, highlighting the importance of understanding the characteristics and behaviors of dust in these settings.