What is the primary risk of using foam extinguishers on electrical fires?

Using foam extinguishers on electrical fires poses a primary risk because foam can conduct electricity. This means that if foam is used inappropriately on an energized electrical source, it can potentially create a path for electrical current to flow, which increases the risk of electrocution for the individual applying the extinguisher and may also worsen the fire situation by causing electrical shorts or further igniting flammable materials.

It's critical to use extinguishers specifically rated for electrical fires, such as CO2 or dry chemical extinguishers, which are designed to suppress such fires without creating additional hazards. Understanding the properties and appropriate applications of extinguishing agents is vital to ensuring safety in emergency situations.