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Why should soda-acid and foam-type extin...

Why should soda-acid and foam-type extinguishers not be used in fighting electrical fires?

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In both types of fire extinguishers, the resultant solution contains sodium sulphate, sodium bicarbonate and sometimes conc. `H_2SO_4`. These are electrolytes and may conduct electricity resulting in electric shocks or enhance short circuiting which can cause another fire.
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