Description of shielded control cables
The control cable is a kind of special kind of cable. It is widely used in many electromechanical applications. It also has some classifications for the control cable. Today, Guowei cable manufacturers understand the advantages and performance of the insulated cable and shielded cable in the control cable.
Our common control cable's insulated wire core is color-coded, and its preferred color and color sequence are as follows: two-core cable: no preferred color; three-core cable: green/yellow, light blue, brown, or light blue Color, black, brown; four-core cable: green/yellow, light blue, black, brown; or light blue, black, brown, black, brown; five-core cable: green/yellow, light blue, black Brown, black, or brown; or light blue, black, brown, black, or brown, black, or brown; Insulated wire cores with a digital sign, whose insulation color is significantly different from the color of the digital sign, are preferentially color-coded and black The number is white.
At the same time, the use of flame-retardant PVC insulation materials for insulating materials not only meets the requirements of the GB/T8815-2002 standard, but also their oxygen index OI should not be less than 32%. Insulated cores should be twisted into composite cables with the twisting direction of the outermost layer at the right direction. The twisting pitch: the hard structural cables laid by the rubber sheathed cables should not exceed 20 times the outer diameter of the twisted wire; The soft structure cable shall not be greater than 16 times the outer diameter of the twisted wire. The gap between the insulated cores allows the use of flame-retardant non-hygroscopic materials.
In addition, the shielded cable should have a shielding layer made of copper tape or round copper wire braided outside the cable core. Other suitable shielding materials and forms are permitted, if necessary, but provisions should be made. The copper tape shield allows the use of 0.05 to 0.10mm thick soft copper tape overlapping wraps with an overlap of at least 15%. Circular copper wire braided shield is made of soft round copper wire or tin-plated round copper wire, its weaving density is not less than 80%, the braiding layer is not allowed to be connected, the exposed copper wire head should be trimmed, and the metal ingot should be replaced every 1 meter length. once.
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