There is a limit to the temperature tolerance of the cable conductor. If the conductor continues to operate above the maximum temperature, it is prone to dangerous accidents. The maximum operating temperature value of the cable corresponds to the maximum current. If the maximum current value is exceeded, it is an overload. Overloading of the conductor can cause the temperature of the conductor and accessory equipment to rise, causing the equipment to burn out, short circuit, etc., and this phenomenon is also the most direct cause of electrical fire accidents.
1. When planning the route routing, you need to accurately estimate the required capacity of the building, and consider the possibility of expanding the capacity to purchase the appropriate type of cable. For large-capacity cabling systems, cables with larger diameter conductors are required to reduce the cable overload probability. The cable selection is not suitable, which will leave serious trouble for subsequent laying. In small project engineering, cable selection and design wiring are not taken seriously. The wiring and selection of cables should fully consider the affordability of the line when new electrical equipment is added.
2. The laying of the line should be carried out by a professional electrician, and the construction should meet the requirements of the specification. Line laying has a direct impact on the heat dissipation of the wire. Cables cannot pass through flammable materials. These materials can accumulate heat in the wires, hinder heat dissipation, and even ignite surrounding combustibles, increasing the chance of fire. When moving from a public place with a large flow of people, it should be laid with a ceiling. The line passes through the steel pipe to isolate the tonality from the cable. When the circuit is overloaded or short-circuited, it can prevent the beads from falling and prevent the fire. The accident occurred.
3. Strengthening routine maintenance and management, avoiding the interconnection of lines, is an important and effective measure to prevent electrical fires. In addition, mobile sockets should be used with caution. Inadvertent wiring, messy or improper use of mobile sockets will increase the amount of operating current, resulting in overload. Mobile sockets should not be connected to too many electrical equipment, and the voltage is too large to be carried. Devices and appliances with higher power should be connected to the socket panel separately.
4. The aging line of the old building should be updated and modified in time to eliminate the fire hazard. Many old houses and enterprises have exceeded the service life and the aging phenomenon is obvious. With the increase of household appliances and application equipment, the aging line can not withstand the current carrying capacity, and the line should be rectified in time to prevent safety risks.