The double-shielded network cable is mainly used in a strong interference environment, and the shielding layer of the internal structure has a layer of aluminum foil paper and a metal woven mesh. It can effectively resist external electromagnetic interference and maintain the stability of the transmission network. The aluminum foil also blocks the electromagnetic leakage of the cable itself, and does not emit interference signals that affect the operation of other cables, and can prevent information.
When the double-shielded copper network cable transmits the network signal, the distance is relatively short. In the market, the resistance of the material of the copper wire is very high, the copper material is bronze, which belongs to the secondary recovery copper, and the purity of the copper is low. Therefore, the resistance is relatively large, and the resistance test of 300 meters is about 110 ohms.
The transmission distance of the unshielded copper network cable is about 80 meters, and the double shielding will consume the transmission distance of the network cable itself due to the electromagnetic interference of the shielding layer, which causes the network signal to have a certain attenuation, about 60-70 meters. .
Generally, the normal wiring environment can choose all copper cable. POE power supply should not choose full copper network cable. POE power supply has high requirements on network cable. The transmission of copper cable is not stable enough. It is necessary to use oxygen-free copper cable.
The integrated wiring manufacturer Starte reminds: the shielded network cable has high requirements for the connected system, all need to be shielding devices, and the building has a good grounding system. Otherwise it will not be shielded. Therefore, if there is no strong power or high interference environment nearby, it is better to choose an unshielded network cable.
FTP Cat6 Shielded Ethernet Patch Cable