1, electrical equipment overload, poor contact with electrical line connectors, electrical line short circuit, etc. is the direct cause of electrical fires. Electrical equipment failure, improper use of electrical equipment settings, etc., is the indirect cause of electrical fires, for example, paper or cloth and other combustible materials covered in the equipment to affect its heat dissipation, the use of non-explosion-proof electrical equipment in the flammable and explosive workshop. Suspected arson mainly refers to fires caused by human arson, in which the person concerned intentionally starts a fire by means of arson in order to achieve a certain goal. This type of behavior is usually planned and prepared, and as a result, the fire develops quickly and has serious consequences. Spontaneous combustion of a large number of substances piled up in a hot, humid environment, the heat generated within the system is difficult to disseminate, a large number of accumulation, in the absence of any external source of ignition in the event of spontaneous combustion. For example, a large number of wood accumulation triggered spontaneous combustion, nitrocellulose accumulation triggered spontaneous combustion.
2, fire hazards: endangering the safety of life in the building combustible materials in the fire combustion of high temperature and high heat, will cause serious injury to the human body, and even cause shock, death. Building materials released during the combustion of toxic gases, trapped people inhaling toxic gases will appear breathing difficulties, headache, nausea, nervous system disorders and other symptoms, threatening life safety. The building after combustion beyond the load-bearing components of the fire-resistant limit, will lead to the collapse of the building as a whole or part of the collapse, resulting in people being smashed, pressure casualties. Fire will also seriously damage the ecological environment, such as the occurrence of forest fires, will make a large number of animal and plant deaths, environmental degradation, climate anomalies, soil erosion, resulting in the destruction of the ecological balance, triggering famine and disease epidemics, threatening the survival and development of mankind.