National standard cable And Non standard wire and cable Compared with the service life of, there is no doubt that National standard cable It has a long service life,
Let's make a brief analysis, Non standard cable What are the hidden dangers
1、 Non standard wire and cable The insulation layer mainly plays the role of preventing electric leakage and ensuring safety. If the insulation layer of wires and cables is not up to standard, it is easy to appear insulator cracking during installation, which will expose the live conductor and threaten personal and property safety.
2、 Non standard wire and cable Copper conductor accounts for 70% - 80% of the cost of wire. The state has a clear regulation on cable manufacturing: electrolytic copper should be used for copper conductor of wire and cable.
In order to reduce costs and obtain huge profits, some enterprises use recycled copper or copper-clad aluminum, copper-clad iron, copper-clad steel to impersonate copper. The conductivity of these copper is very poor, which easily leads to over resistance.
3、 Non standard wire and cable The cross-sectional area is not enough, and the problem wires are filled with small ones to reduce the consumption of copper and reduce the cost.
4、 Non standard wire and cable If the length is not up to the standard, the standard line is 100 meters, while most non marking lines are about 90 meters. The measured length of some wires is less than 50 meters, but the nominal total length is 100 meters.
In addition to the above, Non standard cable There are also huge security risks, Non standard cable Can not be competent for the national standard cable work, if Non standard cable When the national standard cable is used, combined with the above shortcomings, often "Overload" uses high-power electrical appliances,
The safety current of the cable is exceeded, resulting in thermal aging "Non standard" cable outer insulation can not meet the standard, the anti-aging degree is reduced, it will be easy to skin rupture, and the service life will not be very long.
National standard cable The price is relatively expensive, but it can be guaranteed that it is genuine and affordable. It can be used for a long time with ease and ease of mind. The price of non-standard cable is cheap, but it is easy to cause accidents because of its shoddy workmanship. The fire caused by wire is not rare.