Overloading also puts the connections in the line under overheating conditions, which speeds up the oxidation process. Oxidation produces a thin layer of oxide film that is not easy to conduct electricity at the connection points. The oxide film increases the resistance between the contact points, resulting in ignition and other phenomena, causing fires.

　　So, how to prevent fire due to wire and cable overload?

　　1. In the process of circuit design, the capacity of the site should be accurately verified, and the possibility of adding capacity in the future should be fully considered, and the appropriate type of wire should be selected. For large capacity, thicker wires should be selected. Circuit design and reasonable selection are the key steps to prevent overload. If the design is not properly selected, it will leave inherent hidden dangers that are difficult to rectify. Some small projects and places are not carefully designed and selected. It is very dangerous to choose and lay lines at will. New electrical appliances and electrical equipment should fully consider the capacity of the original lines. If the original line does not meet the requirements, it should be redesigned and remodeled.

　　2. The line should be constructed and laid by qualified electricians in accordance with the requirements of relevant regulations. The wiring conditions directly affect the heat dissipation of the wires. Generally speaking, the wiring should not pass through flammable and combustible materials and stacks, which will cause poor heat dissipation of the wires, heat accumulation, and the possibility of igniting the surrounding combustible materials, which increases the risk of fire under overload conditions; Lines laid in the decoration ceiling of public entertainment places should be protected by steel pipes to separate the ceiling from the lines. Even if there are molten beads in overload, short circuit, etc., they will not fall to avoid fire.

　　3. Strengthen power management, avoid random wiring and wiring, and use mobile sockets with caution. Random wiring, random wiring, and use of mobile sockets are actually adding electrical equipment to a certain section of the line, which increases the amount of current and may cause overload. There are obviously more mobile sockets than fixed sockets on the wall. If too many electrical equipment are used on the mobile sockets, the original wiring must be unbearable. For larger power equipment and electrical appliances, separate lines should be set up, and mobile sockets should not be used as wiring sources.

　　4. Speed ​​up the renewal and transformation of old lines to eliminate fire hazards. Many lines in old enterprises, old residential areas, etc., have been used for a long time, and have exceeded their service life. Even if the current-carrying capacity of some lines is not large, the aging circuit can hardly bear such current-carrying capacity, and it also has the danger of overload. Especially in old residential areas, the lines have long been aging, but with the improvement of people's living standards and the increase of household appliances, the electricity consumption is still increasing year by year, which is really worse. For the old lines, timely supervision and coordination should be carried out, and rectification should be promoted as soon as possible to eliminate fire hazards and ensure safety.