What are the precautions to be taken in the use of cables?

I. What are the precautions to be taken in the use of cables?1. Cable installation: cable laying and installation does not meet the standard requirements, cable engineering and construction units are not in accordance with the specified requirements of the construction, the process equipment is poor, and does not strictly implement the laying process, the installation process is not supervised, there is no self-checking and mutual checking, which will lead to the probability of accidents to rise, and cause fires.2. Line short-circuiting: short-circuiting refers to the two wires of the alternating current circuit are in contact with each other, and the electric current directly forms the circuit rather than passing through the electrical equipment in the circuit. The resistance of the cable itself is relatively small, if only through the cable circuit, the current will increase dramatically, tens or hundreds of times larger than normal. The greater the resistance, the more heat is generated, and the wire generates thousands of degrees Celsius in a very short period of time, enough to ignite nearby flammable materials and cause a fire.3. Poor contact: Excessive wire contact resistance, heat, and fire due to poor wire joints. All electrical circuits have connectors, either between wires or between wires and switches, fuses or appliances. If these joints are poorly connected, when this heat is sufficient to melt the insulation of the wire, the insulation will catch fire and ignite nearby combustibles.4. Cable aging: cable overload heating, sunlight (ultraviolet), ambient temperature changes, cable cooling conditions and exposure to atmospheric and environmental chemical attack can lead to the aging of the cable insulation and the outer sheath, the cable severe overloading is the main reason for accelerating the aging of the cable insulation, data Introduction of cable long-term overload operating temperature exceeds the insulation allowable long-term operating temperature.

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