1. To prevent thhn wire from catching fire due to wire overload, the capacity of the site should be accurately determined during the line design process, and the possibility of adding new capacity in the future should be fully considered to select the appropriate type of wire. Large capacity, thicker wires should be selected. Line design and reasonable selection are key steps in preventing overload. If the design selection is improper, it will leave inherent hidden dangers that are difficult to rectify. Some small-scale projects and places are not carefully designed and selected. Choosing and laying lines arbitrarily is very dangerous. New electrical appliances and equipment should fully consider the load-bearing capacity of the existing lines. The original line did not meet the requirements and should be redesigned and renovated.
2. THHN cable lines should be constructed and laid by qualified electricians in accordance with relevant regulations. The laying conditions of the circuit directly affect the heat dissipation of the wires. Generally speaking, the laying of power lines should not pass through flammable or combustible materials or stacks, as this can lead to poor heat dissipation of the wires, heat accumulation, and the possibility of wire THHN igniting surrounding flammable materials, increasing the risk of fire under overload conditions; The THHN wire line installed in the ceiling of public entertainment venues should be protected by steel pipes to separate the ceiling from the THHN cable line. Even if there are molten beads in overload, short circuit, and other situations, they will not fall off, avoiding the occurrence of fires.
3. Strengthen electricity management, avoid disorderly wiring and tying, and use mobile sockets with caution. Disorderly wiring, misconnecting, and using mobile sockets are actually adding electrical devices to a certain section of the line, increasing the current and potentially causing overload. Mobile sockets have significantly more sockets than fixed sockets on the wall. If too many electrical devices are used on mobile sockets, the original wiring will inevitably be unable to withstand them. For high-power equipment and appliances, separate circuits should be installed, and mobile sockets should not be used as wiring sources.
4. Accelerate the renovation of THHN wire old lines and eliminate fire hazards. Old enterprises, old residential areas and other units, due to their long service life, many lines have aged and exceeded their service life. Even if the current carrying capacity of some THHN cable lines is not large, aging lines are unable to withstand such a current carrying capacity and also have the danger of overload. Especially in old residential areas, the wire thhn road has long aged, but with the improvement of people's living standards and the increase of household appliances, its electricity consumption is still increasing year by year, which is really adding insult to injury. For old power lines, timely supervision and coordination should be carried out to urge their rectification as soon as possible, in order to eliminate fire hazards and ensure safety.
