What class of fire includes ordinary combustibles?

The classification of fires is based on the types of materials that are burning. Class A fires specifically include ordinary combustibles such as paper, wood, cloth, rubber, and some types of plastics. These materials can ignite and burn easily and are typically found in residential and office environments.

When dealing with fires, understanding these classifications is crucial for determining the appropriate extinguishing agent. For example, Class A fires can be effectively extinguished with water or foam because they primarily involve solid materials that produce ash. This distinguishes Class A from other classes of fire, such as Class B, which involves flammable liquids; Class C, which involves electrical equipment; and Class D, which pertains to combustible metals like magnesium or sodium that require special handling.

Recognizing the characteristics of Class A fires helps individuals respond effectively and safely when faced with such emergencies.