What is the preferred substance used to extinguish electrical short circuit fires?

The preferred substance to extinguish electrical short circuit fires is CO2, or carbon dioxide. This is because CO2 is a non-conductive substance, which makes it safe to use on live electrical equipment. When CO2 is released, it suffocates the fire by displacing oxygen, thereby eliminating one of the essential elements needed for combustion. Unlike water, which can conduct electricity and may pose a risk of electrocution when used on electrical fires, CO2 is effective in quenching the flames without introducing any additional hazards.

Furthermore, CO2 leaves no residue after extinguishing the fire, making it especially beneficial for protecting sensitive electronic equipment where residue from other extinguishing agents, such as foam, could cause further damage. Always consider using CO2 for electrical fires as it provides a safe and effective means to manage such incidents without the risks posed by other methods.