Which fire classification method was adopted by Underwriters Laboratories?

The classification method adopted by Underwriters Laboratories (UL) is based on extinguishing agent. This approach categorizes fires according to the type of agent that can effectively suppress them. This method is critical for ensuring that the appropriate fire extinguishing equipment is used for specific types of fires, thus enhancing safety and minimizing risk.

Fires are classified into various groups such as Class A, B, C, D, and K, where each class corresponds to the fuel involved and the type of extinguishing agent suitable for that particular class. For instance, Class A fires involve ordinary combustible materials like wood and paper, which can be extinguished using water or foam, while Class B fires involve flammable liquids and gases, requiring agents like dry chemical or foam.

Understanding this classification helps both professionals and laypersons to select the right fire suppression tools and strategies according to the specific circumstances they encounter, significantly impacting fire safety practices.