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Difference between screened and unscreened instrumentation cables

Overall Screened Cables is an electrical cable which is enclosed by common conductive layers and has one or more insulated conductors. Primarily two different types of cables are used in airfield lighting circuits first is non screened cable and second is screened cables. These cables determine a defined voltage across the dielectric field. In present time Overall screened cables are chiefly used because it decreases the electrical noise and electromagnetic interface effects, which can interrupt the transmission performance.  In the manufacturing of screened cables different qualities of metal foil and braid may be used as screened material.

On the basis of environment people selects the screened cables. Unscreened cables chiefly used in office application environments whereas screened cables mostly used in industrial application, where high transmission power needed. The shield of screened cables is tranquil by braided standard of copper or layer of conducting polymer and this shield is also covered by a jacket. This shield acts as a hurdle which is used to reduce electrical noise which affects the signals and to reduce electromagnetic radiation.   Three types of screened cables are mostly used in the market are coaxial cable, fiber optical cable and building wire. Fiber optical cable has composed of a number of layers of plastic coating which act as a protection layer for fiber. Building wire cable is also known as the branch circuit wiring which demeanor an electrical current and dispatches it to external appliance. These kind of screened cables are rated on the basis of voltage and temperature. Coaxial cable is a kind of screened cables which has an inner conductor which is covered by an insulating layer and which further covered by a conducting shield.  This is the reason that screened cables are mostly used in the market.

Screened Instrumentation Cables are depict and fabricated to ensure repose of installation, littlest interference in transmission of signals and full consent to recognized industrial standards.  Screened Instrumentation Cables have very divergent applications. Mostly these types of cable are used in communication and instrumentation applications like oil exploration, power generation, paper generation, steel and cement fabrication etc. These cables are mainly used in process controls, transmission of signals and in monitoring of network. These cables are also capitalized in protection of the system from hazards areas. Screening of these instrumentation cables are replenished by aluminum-Mylar tape with copper drain. These types of cable are so popular in instrumentation industries.


Unscreened Instrumentation Cable is a cable which does not contain an outer sheet. The local voltage of Unscreened Cables beyond the dielectric is not as well determined as in the case of screened cables. There are some problems related to unscreened instrumentation cable as safety, tracking and burning. Safety related problems introduce the risk of electrical discharge, failure of cable and fire hazards on cable. We are one of the world’s leading artisans of a nonpareil technologically major specialty cables. We are providing bet qualities of screened & unscreened cables in Delhi.

About the Author

Dave Stewart

Relemac is a well reputed name in design and supplier of high-performance, high-band width cables and wires for telecommunications. We are the world s largest manufacturers of Fibre Glass Cable, Asbestos Insulated Fire Proof Cable and Air Field Cables etc.