Given: An electrical equipment room does not normally have combustible dust that may be suspended in the air as a result of infrequent malfunctioning of handling or processing equipment. This location is the defined in the National Electrical Code as what hazardous classification?

Given: An electrical equipment room does not normally have combustible dust that may be suspended in the air as a result of infrequent malfunctioning of handling or processing equipment. This location is the defined in the National Electrical Code as what hazardous classification?