Which type of fire extinguisher should not be used on electrical fires?

Water extinguishers are not suitable for use on electrical fires because water is a conductor of electricity. When water is applied to an electrical fire, it poses a significant risk not only by potentially spreading the fire but also by creating a situation where electrical shock can occur.

Electrical fires typically involve energized equipment or wiring, so using non-conductive agents is essential to ensure safety. In contrast, CO2 and dry chemical extinguishers are effective in extinguishing electrical fires because they do not conduct electricity. Foam extinguishers, while commonly used for flammable liquid fires, are also not recommended for electrical fires due to their potential conductivity. Thus, water extinguishers are specifically excluded from use in situations involving electrical hazards. Understanding the properties of different fire extinguishing agents helps ensure safe and effective firefighting practices.