How to Identify Inferior Building Security Cable?

From the surface you can see pressure inside net regular "roughness", shows good processing technology, it won't produce the relative sliding, is good building security cable; Appearance is smooth, can not see compaction net "roughness", if knead sheathed have loose feeling with the hand, it is a bad cable.

Check the shielding layer braid net: if the braiding quantity is nough, copper braiding net, check the weldability, Tinned Copper wire, scrape to see if it is copper wire, the hardness of aluminum magnesium alloy wire is bigger than that of copper wire; braiding net is sparse, uneven distribution, and package not tight with cable insulation, it will be bad cable.

Check conductor: diameter - SYV cable of 0.78 - 0.8mm, SYWV cable 1.0mm; Recently there is a SYV75-5 conductor cable of 1.0mm diameter, the characteristic impedance of the cable will be certainly not 75ohms, should not applied to the transmission system of 75ohms.

Check the adhesion force of conductor and insulation layer: oblique incision insulating layer, according to the direction of stripping away conductor, the conductor and insulation layer have bonding process materials; Good wire cable has bigger adhesion force, poor cable without sticking.

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