Let me clarify one thing, on large fires, a fire investigator is sent to the fire. Fire investigators mostly due a great and accurate job of finding the cause of the fire. The fire calls I am talking about are the ones that cause minim damage. These make up a vast majority of the NFPA fire reports. Most of these fires do not warrant a fire inspector be called. In small FD, a fire inspector may make every fire. My reference is to large FD departments in large cities. These departments have a few inspectors to cover a large area and only respond to larger fires. Dryer fires are very common due to years of lint build-up. Although this is an electrical appliance, the fire is not caused by electrical malfunction. But I have made fire calls on a dryer where the cause was caused by a dryer cord shorting against the chassis where it enters the dryer. This is electrical. The details you put in the fire report help the NFPA & NEMA develop codes and rules to address these problems.