For an electrical fire, the correct extinguisher is a Class C–rated extinguisher, most commonly a carbon dioxide (CO₂) or dry chemical (dry powder) extinguisher.

Quick Scoop

  • Use for electrical fires:
    • CO₂ fire extinguisher (often labeled for Class B and Class C fires).
* Dry chemical/dry powder extinguisher that is clearly marked as Class C (or BC/ABC including Class C).
  • Why these are used:
    • They contain non‑conductive agents, so they do not carry electricity back to the user.
* CO₂ works by displacing oxygen and smothering the flames without leaving residue on electrical equipment.

* Dry chemical interrupts the chemical reaction of the fire and forms a barrier between fuel and oxygen.
  • Absolutely avoid:
    • Standard water or foam extinguishers on energized electrical equipment, as water conducts electricity and can cause severe shock or spread the fire.

In simple terms: look for a Class C label (or BC/ABC including C); do not use water on an electrical fire.

Information gathered from public forums or data available on the internet and portrayed here.