In an emergency, which type of extinguisher should be used on an electrical fire?

Using a dry chemical extinguisher on an electrical fire is the most appropriate choice because it is designed specifically to suppress fires involving electrical equipment. Dry chemical extinguishers often contain agents such as sodium bicarbonate or monoammonium phosphate, which effectively interrupt the chemical reaction of fire and provide a non-conductive barrier that is safe for use on energized electrical equipment.

Water extinguishers are not suitable for electrical fires, as water is a conductor of electricity and can create a significant risk of electrical shock or re-ignition. Foam extinguishers are also ineffective against electrical fires since they do not effectively insulate the electrical source. Class K extinguishers are specialized for kitchen fires involving cooking oils and fats, making them irrelevant in the context of electrical fires.

Overall, the dry chemical extinguisher provides both effectiveness against the fire and safety for the person using it, allowing for effective fire suppression without the risks associated with water or other types of extinguishers.