Deck General · Extinguishing Agents
Which extinguishing agent is appropriate for a Class C (energized electrical) fire?
- AWater (straight stream)
- BAFFF foam
- CCO2 or dry chemical✓ Correct
- DWet chemical (potassium acetate)
Explanation
Class C fires require a non-conductive extinguishing agent. Both CO2 and dry chemical are non-conductive and safe to use on energized equipment. Water is an electrical conductor — a direct stream creates a shock hazard for the firefighter. AFFF foam and wet chemical are also conductive. Once power is secured, the fire may revert to Class A treatment.
Authority: Firefighting (USCG deck topic)
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