Portable extinguishers are classified according to their capacity for handling specific types of fires. Fire extinguishers must be readily accessible, properly maintained, regularly inspected and promptly refilled after use.
Class "A" Extinguishers
For fires in ordinary combustible materials such as wood, paper and textiles where a quenching, cooling effect is required.
Class "B" Extinguishers
For flammable liquid and gas fires, such as oil, gasoline, paint and grease where oxygen exclusion or flame interruption is essential.
Class "C" Extinguishers
For fires involving electrical wiring and equipment where the non-conductivity of the extinguishing agent is essential. This type of extinguisher should be present wherever functional testing and system energizing takes place.
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