Which factor is crucial in selecting a fire extinguisher for electrical fires?

Selecting a fire extinguisher for electrical fires is primarily concerned with the property of non-conductivity of the extinguishing agent. Electrical fires occur when flammable materials are ignited due to electrical faults or failures, and the extinguishing agent must not conduct electricity to avoid the risk of electrocution to the person using the extinguisher or further exacerbating the fire.

Most traditional extinguishing agents, such as water, are conductive, making them dangerous to use on electrical fires. Therefore, using non-conductive agents, such as carbon dioxide (CO2) or dry chemical agents specifically designed for electrical fires (like sodium bicarbonate), is essential. These agents can effectively put out the fire without posing a risk to the user or increasing the electrical hazard.

Other factors, such as the weight or size of the extinguisher, brand reputation, and color, are less critical in determining suitability for combating electrical fires. While it is important to have an extinguisher that is easily operable and identifiable, the primary concern must always be ensuring that the extinguishing agent will not introduce additional risks associated with the electricity involved in the fire.