Which symbol identifies Class C extinguishers (color and shape)?

Which symbol identifies Class C extinguishers (color and shape)?

• A. Red square B
• B. Blue circle C
• C. Green triangle A
• D. Yellow star D

Answer: (B)

Class C extinguishers are identified by a blue circle in the color-and-shape coding used for fire classifications. This blue circle symbol is specifically designated for energized electrical fires, which is why it is the correct symbol. The other symbols map to different classes—green triangle for ordinary combustibles, red square for flammable liquids, and yellow star for metal fires—so they don’t indicate Class C. Always verify the extinguisher label to confirm the class compatibility and use appropriate agents for electrical fires.

Class C extinguishers are identified by a blue circle in the color-and-shape coding used for fire classifications. This blue circle symbol is specifically designated for energized electrical fires, which is why it is the correct symbol. The other symbols map to different classes—green triangle for ordinary combustibles, red square for flammable liquids, and yellow star for metal fires—so they don’t indicate Class C. Always verify the extinguisher label to confirm the class compatibility and use appropriate agents for electrical fires.