What is the class/rating for the EFRS CO2 extinguisher?

• A. 10A120BC
• B. 14kg
• C. METAL X
• D. 10BC

Answer: (D)

Extinguisher ratings tell you which fire types the extinguisher can be used on and how large a fire it’s designed to handle. CO2 extinguishers are rated for BC fires, meaning they’re suitable for flammable liquids (Class B) and electrical (Class C) fires, but not for ordinary combustibles (Class A). The number before BC indicates the size or effectiveness of the extinguisher for those classes.

So the correct choice shows a BC rating with a numerical size, such as 10BC. That matches a CO2 extinguisher’s labeling.

The other options aren’t correct because they either include an A rating (which CO2 extinguishers don’t have), show only a weight (not a rating), or present a brand name instead of a proper BC rating.