What type of fire extinguisher is commonly used for electrical fires?

The correct choice is carbon dioxide extinguishers. These extinguishers are effective for electrical fires because they do not conduct electricity and can safely displace the oxygen that fuels the fire without leaving any residue that could damage electrical equipment. Carbon dioxide works by suffocating the fire, effectively reducing the oxygen concentration in the area, which is crucial for extinguishing any flame, especially those fueled by electrical sources.

In contrast, water-based extinguishers and foam extinguishers are not suitable for electrical fires. Water can conduct electricity and potentially create a shock hazard, while foam is typically used for flammable liquid fires and may not effectively handle fires involving electrical components. Powder extinguishers can be used on electrical fires, but carbon dioxide extinguishers are often preferred due to their lack of residue and safety profile around electrical equipment.