Do you know the six materials of network cables? Recognize that it can prevent pits
With the rapid development of science and technology, network cables in our security system, network system, home network wiring system plays an important role, network cables generally have five types of network cables (CAT5), super five types of network cables (CAT5e), six types of network cables (CAT6), super six types of network cables (CAT6A), seven types of network cables (CAT7), although they are all network cables, but the materials are divided into several types, today we will take stock of the six materials of network cables, recognize that can prevent being pitted Oh!
1. Four iron and four aluminum network cables
Among the six materials, the four iron and four aluminum network cable is the worst quality, the transmission is unstable, it is easy to have signal attenuation, and the 100 meter resistance is about 50Ω, the transmission distance is only about 60 meters at most, and it is only suitable for use in a short distance transmission.
How to identify:
A. The inner layer of the aluminum mesh cable is dull and will break off as soon as it is pulled;
B. Use a magnet to attract the network cable, if it is attracted, it proves that the network cable contains iron, which is the easiest way to distinguish;
C. Because the four cores of iron and aluminum are made of different materials, they are much harder than all copper, copper-clad aluminum and other materials;
D. The hardness of iron is very high, and it will not soften quickly when burned with fire.
2. Copper-clad aluminum network cable
Copper-clad aluminum network cable is covered with a layer of oxygen-free copper outside the aluminum wire, the conductivity of the aluminum wire has been improved to a certain extent, due to the characteristics of the skin effect, copper-clad aluminum inner conductor can fully meet the signal transmission requirements, 100 meters resistance is about 28Ω, roughly can transmit 100 meters, only suitable for short-distance POE power supply, and copper-clad aluminum network cable tensile strength is low, poor oxidation resistance, service life is not long, the use process can not be vigorously pulled.
However, the copper-clad aluminum network cable is a little softer than the oxygen-free copper network cable, which brings convenience to the transportation and erection of the cable.
3. High conductivity copper network cable
High conductivity copper is usually also called copper-clad silver, but its composition is not only copper and silver composition, in fact, it is a copper-aluminum silver alloy network cable, the resistance is small, the transmission distance is far, 100 meters resistance is about 20Ω, can transmit 120 meters, but like the copper-clad aluminum network cable, poor oxidation resistance, service life is not long.
4. Copper-clad silver network cable
Copper-clad silver network cable, also known as high conductivity aluminum network cable, is actually copper aluminized network cable, because its main material is imported aluminum, the material is purer than ordinary copper-clad aluminum, this network cable is a new variety of network cable, the price is not expensive, and the transmission distance is far, suitable for use in ADSL, computer room, supermarket, warehouse such as small and medium-sized areas of the occasion, but because the material contains a small amount of aluminum, easy to be oxidized, so it and copper-clad aluminum network cable like poor oxidation resistance, service life is not long.
The resistance of 100 meters is about 15Ω, and it can transmit 150-180 meters.
5. Copper-clad copper network cable
Copper-clad copper network cable refers to bronze, coated with a layer of oxygen-free copper network cable, called full copper network cable. The inner layer of the mesh cable is made of secondary materials, and the copper-clad copper is not a very pure copper, it belongs to the recycled secondary copper, the color of the cross-section is not very uniform, and even the middle of the copper core is a little white, when scraped with a knife, you will find that the color inside and the outer layer are different.
The resistance of 100 meters is about 40Ω, which can transmit about 80 meters, with strong oxidation resistance and long service life.
6. Oxygen-free copper network cable
Oxygen-free copper refers to pure copper that does not contain oxygen and does not contain any oxygen absorber residues. But in fact, it still contains very trace oxygen and some impurities. According to the standard, the oxygen content in the oxygen-free copper network cable is not more than 0.003%, the total impurity content is not more than 0.05%, the purity is greater than 99.95%, the oxygen-free copper has no hydrogen embrittlement, high conductivity, good processing performance and welding performance, corrosion resistance and low temperature performance, ultra-low resistance, farther transmission and more stable, suitable as a high-quality network cable material.
Oxygen-free copper network cable 100 meters resistance is about 10Ω, can transmit about 120-150 meters, signal transmission distance, low packet loss, so in network engineering, network high-definition monitoring engineering and home decoration dark line are recommended to use oxygen-free copper, network stability is guaranteed, strong oxidation resistance, long life.
If scraping a surface or cross-section with a knife:
Bronze mesh cable: scrape off the surface layer, the surface and internal color are different, and there are some white spots in the cross-section.
Oxygen-free copper network cable: scrape off the surface layer, the color is basically no difference, and the cross-section color is uniform.
If you burn with fire, the surface of the all-copper is plated with a layer of oxygen-free copper, in the process of burning, you will find that the outer layer of oxygen-free copper will melt, and then wipe it with paper, you will find that the all-copper wire core is difficult to change back to the original brass color;
In the process of burning, oxygen-free copper is only oxidized on the surface, and it will return to its original yellow color after wiping with paper.
Some of the material comes from the Internet
Do you know the six materials of network cables? What else do you want to know about mobile phones/computers, leave a message in the comment area to tell Ozawa!
The above is the introduction and description of 24AWG 4 pair Black/Gary PVC 4P CAT6A Round patch cord cable UTP, I hope it can be helpful to you.