Safety, Fire & Survival · Fire — Portable Extinguisher Selection
Which portable extinguisher is appropriate for a live electrical fire (energized equipment)?
- ACO2 or a clean agent — non-conductive and leaves no residue✓ Correct
- BA soda-acid water extinguisher
- CA foam extinguisher
- DA water jet extinguisher
Explanation
Energized electrical fires (Class C in the U.S./Class E elsewhere) require a non-conductive agent: CO2 or a clean agent (or dry chemical) that won't conduct current back to the operator and leaves equipment relatively clean. Water and foam conduct electricity and must not be used on live gear.
Authority: NFPA 10; fire classes and extinguisher selection
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