If replacing a 40A extinguisher, which is true?

If replacing a 40A extinguisher, which is true?

• A. Two extinguishers
• B. A higher rating is acceptable
• C. Two smaller extinguishers can replace it
• D. None; you must use a similar rating

Answer: (D)

Fire extinguisher ratings show how much of a fire a single unit is tested to handle for a given hazard. A 40A rating represents a specific tested capacity, so when you replace that extinguisher you need a unit with a similar rating to maintain the same level of protection. Using two smaller extinguishers isn’t equivalent to a single 40A unit because the performance is tied to one device’s tested capacity and its ability to be applied effectively from one location. A higher rating isn’t automatically required or allowed in every code, so the safest, code-conforming choice is to replace with a similar rating.

Fire extinguisher ratings show how much of a fire a single unit is tested to handle for a given hazard. A 40A rating represents a specific tested capacity, so when you replace that extinguisher you need a unit with a similar rating to maintain the same level of protection. Using two smaller extinguishers isn’t equivalent to a single 40A unit because the performance is tied to one device’s tested capacity and its ability to be applied effectively from one location. A higher rating isn’t automatically required or allowed in every code, so the safest, code-conforming choice is to replace with a similar rating.