The rapid development of the Internet age has brought convenience to everyone's life, but also to our social management to bring new challenges, especially the speed of the spread of rumors, we have seen, about a lot of rumors that we believe we can distinguish, but about the wire and cable rumors, you have heard how much?

Not necessarily! For many people, this is already "common sense", but is it really the case? With the improvement of the production process of conductor materials and the progress of science and technology, the advanced production process of oxygen-free copper materials has been widely used. The resistivity of copper conductor materials is sufficient to ensure that the copper wire with a diameter smaller than the nominal diameter can meet the requirements of the corresponding specifications of DC resistance, while the conductor of wire and cable has strict requirements on the resistivity of the conductor, for example, the DC resistance of the 25 mm² copper core conductor specified in the standard at 20 degrees is not more than 0.727Ω/km (the second kind of stranded conductor), so as long as it is not more than this value, the conductor is qualified.

Flame retardant cable will not burn?

Wrong! Flame retardant wire and cable flame retardant refers to the wire and cable fire accident, can block, delay the flame along the wire and cable spread and spread, minimize the wire and cable fire range expansion, this type of cable has the characteristics of self-extinguishing after fire. Fire-resistant wire and cable refers to the wire and cable fire accident, the wire and cable products can be in the external flame is still burning, can adhere to the normal operation of a certain period of time, to maintain the integrity of the wire and cable line and maintain the normal operation of the line equipment.

Wires and cables will have radiation?

Wire and cable do have radiation, but the fact is that all live things have radiation, such as 220V wires also have radiation, but the radiation is very small, basically negligible, and the radiation of wires is far lower than that of mobile phones. If you are really afraid of wire radiation, it is recommended to throw away the mobile phone first. If you are afraid of the magnetic field generated by the wire and cable, and feel that the magnetic field will cause any harm to the human body, then the geomagnetic field is even more terrible. Therefore, it is unfounded to think that "radiation from wires will damage health.

The thicker the cable insulation, the better?

No, too thick cable insulation will increase the difficulty of cable laying. At present, cable laying is mainly based on bridge or pipe threading. At present, many enterprises are implementing tight cable requirements and small outer diameter. There can be gaps in the laying process to dissipate heat energy and ensure that the outer sheath of the cable is not damaged. Otherwise, it will bring certain difficulties to the construction unit and cable laying. In summer, the working temperature will rise, and these temperatures will be emitted through the outer sheath. The thickness of the sheath will increase, and the heat energy will be difficult to emit, which will affect the service life of the cable. Under the action of heat, the insulation layer will occur. A series of physical and chemical changes have lost the original excellent performance, resulting in a significant decline in insulation performance and even a short circuit. Therefore, when choosing a cable, the thickness of the cable must be moderate.

Water and electricity laying pay attention to horizontal, flat and vertical

There's no need! Although the horizontal screen vertical laying of water and electricity lines looks very good, but their hidden dangers are really quite a lot! First of all, the material cost of the conduit is much higher than that of other methods of laying. Secondly, because it is 90 degrees horizontally and vertically, it is easy to get stuck when threading the wires in the later period! So as long as it meets the specifications, how convenient to lay it!

In addition to the above, there are numerous rumors about wires and cables: the cost of wires and cables is low, so selling cables makes huge money; The same quality wires can definitely be bought at a cheaper price. The copper conductor used in wires and cables is not so demanding. Wire and cable will leak electricity in rainy days and are not safe.

Although some of them are rumors, it is not too much to say that wires and cables are lifelines. We should be more careful when purchasing. We should choose the manufacturers, products and national standard products so that we can use them at ease.