Why do firefighters spray water intermittently when putting out a fire? If you look closely, you’ll see the blaze often comes from a live electrical wire. This intermittent spraying method is a special firefighting technique used when high-voltage wires catch fire but can’t be powered off. Unlike ground fires that can be handled with dry powder extinguishers, hanging wires are hard to reach. Firefighters must use high-pressure water jets, but since water conducts electricity, continuous spraying