The structure of shielded cable that is manufactured by insulated conductors with all the standard conductive layers. The reason why it is called shielded cables is that it shielded by strands of braided copper with a spiral tape, or some other polymer taping.
When we compare shielded cable with normal cable, it is much more durable and is thicker than usual cable. We have to use it with much more care so that it doesn’t get damaged. Shielded cables are mostly used in factories and industries where nearby equipment is likely to generate Electromagnetic interface (EMI).
Normal wire i.e, Unshielded wire with normal PVC are not twisted which does not allow EMI. Unshielded wire are thin, light and are used mostly for normal usage like for house fitting, office setting and similar cable systems. As cost of normal unshielded wire costs less than shielded wire. Although normal wire are not good for heavy power usage where heavy machines are used very much used. The shielded wire are the best wire for all the industrial uses as they designed specially for industrial usage and for high power machines.
The basic and important property of shielded wire is that there cores are twisted which reduces EMI.
What Is Shielded Cable Used For?
As the protection of data is a common problem in offices, factories, data centers and industries where electronic equipment or computer technology are heavily used then the twisting of cores is very important.
EMI is generated by an external source that affects an electrical circuit through an electrostatic coupling, conduction, or electromagnetic induction. EMI disturbance can reduce the performance of a circuit or even cease its functioning altogether. Wherever a data path exists, these effects can vary from increased error rates to a complete loss of data. Both natural and artificial (manmade) sources can generate the variable electrical currents and voltages that cause EMI. Vehicle ignitions and mobile phones are prime examples of artificial sources of EMI. Natural sources of EMI include electrical storms and the sun. EMI commonly disrupts AM radios, televisions, and mobile phones.
The shielding in shielded cable reduces the volume and intensity of the electrical noise, lowering its effect on signals and transmission while also reducing electromagnetic radiation.