How Fire Extinguishers Work

Class C For fires in or near energized electrical equipment where the use of a noncon-ductive extinguishing agent is of first importance, use CO2, or dry powder (BC or ABC). NEVER USE WATER. 

Class D Metal fires—combustible metals such as magnesium and sodium require special extinguishers labeled D. 

Class K Grease fires—use a portable extinguisher designed especially for cooling these types of fire. 

Class C Travel distance based on appropriate A or B hazard 

Determine proper location and type Ensure accessibility to all extinguisher locations Document the proper mounting of each extinguisher Check gauges to determine adequate pressure Verify proper placement of pins and seals Look for evidence of damage or tampering Ensure no blockage of nozzles 

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