Wood, paper, cloth, trash, plastics
Solid combustible materials that are not metals.
Flammable liquids: gasoline, oil, grease, acetone
Any non-metal in a liquid state, on fire.
Electrical: energized electrical equipment
As long as it's "plugged in," it would be considered a class C fire.
Metals: potassium, sodium, aluminum, magnesium
takes special extinguishing agents (Metal-X, foam) to fight such a
Classification of fuels