An ABC or Multi-Purpose Dry Chemical portable fire extinguisher is useful for Class A, B and C fires. These units can be used on wood, paper, cloth, trash, flammable liquids and energized electrical equipment. The dry chemical in the units is monoammonium phosphate. The powder chemical works differently to extinguish the various fires. It chemically insulates a Class A fire, smothers and breaks the chain reaction for a Class B fire and will not conduct electricity back to the operator in a Class C fire.
The manufacturer recommends that ABC dry chemical extinguishers be utilized in a variety of different settings including:
BC Dry Chemical
Industrial and Commercial customers may have a need for an extinguisher specifically designed to meet their fire protection needs for an area that has flammable liquids and/or pressurized gases. These extinguishers can be used if there is no chance of a Class A fire. The dry chemical used in these units is able to smother a fire and is electrically non-conductive.