How many extinguishers can replace a 40A rating?

• A. Two extinguishers
• B. A higher rating is acceptable
• C. None; they have to be of similar rating
• D. Any extinguisher can replace it

Answer: (C)

A 40A rating is the performance level of a single extinguisher, determined by standardized testing for Class A fires. That rating isn’t something you can achieve by combining several smaller extinguishers. In other words, there isn’t a specific count of extinguishers that can replace a 40A rating with a different mix. To meet the requirement, you must use extinguishers with a similar rating, meaning the same (40A) or higher, rather than mixing different ratings or relying on multiple units to magically equal the single rating.