The standard dry powder extinguishers are also known as ABC extinguishers as these can be used for class A, class B and class C fires. However, these should not be used in enclosed spaces as the dry powder in the extinguisher can be easily inhaled. Also, it’s not easy to clean up the leftover residue once the fire is over. These can also be used for fires involving electrical equipment. There are also special dry powder extinguishers that are typically used for fires caused by flammable metals. Dry powder extinguishers smother fires by forming a barrier between the fuel and source of oxygen. The label color for this type of extinguisher is yellow. Wet chemical extinguishers can also be used for fires caused by various organic materials including wood, coal, textiles, fabrics, cardboard and paper.