The following provisions should be met when selecting a fire extinguisher

1. Water type, foam, dry powder, haloalkane and other fire extinguishers should be used to fight Class A fires;
2. Dry powder, foam, haloalkane, carbon dioxide, etc. should be used to fight Class B fires, and chemical foam fire extinguishers should not be used to fight water-soluble Class B fires;
3. Dry powder, haloalkane, carbon dioxide type fire extinguishers should be used to fight Class C fires;
4. Halogenated alkanes, carbon dioxide, dry powder fire extinguishers should be used to fight live equipment fires;
5. Dry powder and haloalkane fire extinguishers should be used to fight fires of A, B, C, class and live equipment;
6. Special dry powder fire extinguishers should be used to fight Class D fires.