What should a fire extinguisher be rated for a Class B fire?

In the context of fire safety, Class B fires involve flammable liquids such as gasoline, oil, and grease. The ratings on fire extinguishers indicate their effectiveness on different classes of fires. The numbers preceding the letters represent the amount of agent contained in the extinguisher.

A fire extinguisher rated as 2-A:10-B:C indicates it is suitable for Class B fires (the “B” in the rating), specifically for fires involving flammable liquids, with a minimum performance threshold. The "10-B" rating suggests that this extinguisher can handle a Class B fire with a fire area of 10 square feet, which is a critical measurement for ensuring it is adequate in size and strength to combat a common fire scenario in this category. The A and C components indicate it can also handle Class A (ordinary combustibles like wood and paper) and Class C (electrical fires) respectively, adding versatility for various fire situations.

This rating aligns well with standard requirements for Class B fire extinguishers, making it an appropriate choice for effective fire fighting. The other ratings, while potentially valid for other types of fires, do not directly match the standard consideration of Class B fire requirements.