What Is The Purpose Of Sheath In Cable?

Have you noticed the rubber-like material when you hold a cable? Usually, it is black.

Yes, that’s a Cable Sheath!

What Is The Purpose Of Sheath In Cable?

A Cable Sheath protects the inner conductors and prevents electrocution. It can have both single- and multilayers of insulating material.


What are the advantages of a Cable Sheath?


  • A sheath joins the conductors inside a cable if there are multiple wires.


  • Intact Cable Sheathing also prevents rain, snow, and other environmental hazards from damaging the cable.


  • It reduces the risk of accidents from short circuits.


  • It safeguards passersby/ workers by minimizing the chance of direct contact with an energized cable.


Numerous cable sheaths are available on the market, and they can handle varying voltages and settings. Heavy-duty sheathing is meant for high-voltage power lines in outdoor environments and power plants.


On the other hand, sheathing for low-voltage lines includes phone wires and thermostats, which pose no significant risk and are used in a relatively tamer indoor environment.

Over time, cracks and creases can develop in Cable Sheaths.

Such consequences can be a result of weathering or erosion.


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How do we detect such cracks/ creases?


 Fault checkers can locate hideous cracks/ creases in a Cable Sheath. In some cases, the sheath may be fixed, while in other cases, the cables’ lengths are ncables’lacement.


How can technicians repair a Cable Sheath?


Technicians utilize specialized tools to cut through the Cable Sheath and access the inner portion for splices, repairs, and other activities. Considering safety, the tool is equipped with a non-conductive handle if the cable is energized during ongoing work. Such tools can be purchased from industrial electrical suppliers.


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