See the Internet to sell most of the six categories are non shielded cable. And many of the shield is not the six category.Problem:1, is not the six type of cable is not necessary to shield?2, with shielded cable is not on the inside of the plastic skin layer of wire mesh3, when the screen is meaningful (work)
The shielding is mainly to prevent the crosstalk and the electromagnetic interference in the external environment, so as to ensure the stability of the transmission performance.In addition, there will be 6 types of cable center cross, word, frame and so on, in order to ensure the stability of the structure of the line, thereby ensuring the stability of the transmission line
The main form of shielding: each line of (2 core) wrapped in a layer of aluminum foil, the 4 (8 core) coated aluminum foil, aluminum foil coated wire (mostly copper or tinned copper); some outside may also pack some PE.
The use of shielding or non - shielding, depending on the working environment of your line depends on whether there is no external interference requirements
