CLASS A fires involve paper, wood, and other ordinary combustibles.

CLASS B fires involve flammable liquids, such as gasoline, oil, and some paints and solvents.

CLASS C fires involve energized electrical equipment – power tools, wiring, fuse boxes, appliances, TVs, computers, electric motors, etc.

CLASS D fires involve combustible metals, such as magnesium, potassium, and sodium.

CLASS K fires involve grease in commercial cooking equipment.