Whether shielded wire is selected for household network cable

Let's first look at what the shielding wire is. The internal structure of the shielding wire generally has shielding layers such as aluminum foil and woven mesh, which can resist the strong interference environment, effectively shield the external electromagnetic interference, block the electromagnetic leakage of the cable itself, maintain the stability of the transmission network, and prevent information from being eavesdropped.

1. In general, the home decoration wiring will not have too complex interference, and the data security will not be particularly high. In this case, the use of oxygen free copper unshielded network cable is the best.

2. The wiring requirements of shielded network cable are relatively high. If ordinary unshielded network cables cannot be connected, it will be more troublesome to connect shielded network cables, which need professional decoration masters to deal with.

3. When making shielded wires, the whole transmission system is required to be shielded, and each component needs to have shielding effect, including cables, modules, crystal heads, distribution frames and other links. If there are any abnormal unshielded parts in the whole system, the shielding effect will be almost zero. Just like the barrel law, the shortest piece of wood determines the capacity of the whole barrel.

4. If one point is not done well in wiring, it will not only have no shielding effect, but also have a reaction, which will directly affect the shielding effect. Instead, the shielded network cable has become the largest interference source in the network transmission system, which is equivalent to the use effect of low-level network cable.

5. The cost is high. When all parts of the whole transmission system require shielding, the wiring cost increases. Whether it is wire or module accessories, the price of shielding is higher than that of non shielding!

6. The above is the reason why it is not necessary to use shielded wire in home decoration. However, if it is used in strong interference environment such as Internet cafe, computer room and security network, these two points should be paid attention to when installing shielded wire:

1. The requirements for the whole system are described in detail above.

2. Requirements for network cable installation

In the internal structure of shielded network cable, there will be a special copper wire, namely ground wire, which can better shield external signals. When using shielded sockets (such as RJ45), one end of the drain line must be grounded.

At the same time, when the shielding network cable is connected to the shielding crystal head (with metal shell), the ground wire must contact the metal shell of the crystal head to reflect the shielding effect. Shielded network cable needs a good combination of grounding and shielded line system to reduce the interference to network signals.

In the whole installation process, if the grounding point is arranged incorrectly, the ground wire is not connected, the grounding resistance is too large or the grounding potential is unbalanced, it will cause grounding noise, that is, a potential difference will be generated between some two points of the transmission channel, resulting in interference current on the metal shielding layer, which will make the shielding layer itself form a maximum interference source.

Therefore, for the home network, laying wires and threading pipes themselves have a certain shielding effect. In addition, the interference of the home environment is very small. So it's not necessary at all. It is recommended to select class VI oxygen free copper unshielded network cable of Shanze.