How to Repair Shielded Wire


Electrical wire has an outer layer of polyvinyl chloride (PVC) sheathing that protects the wires inside it from damage. The hot and neutral wires inside also have their own individual plastic covers so they cannot touch and cause a short, though the ground wire itself does not have a cover. If an electrical short occurs, or the electrical cable is damaged by a large knock, the outer and inner plastic covers need to be repaired. This can be done either with electrical insulation tape or by cutting off the damaged area entirely and then retrimming the wires inside.

Things You'll Need

  • Electrical insulation tape
  • Electrical pliers
  • Utility knife
  • Turn off the power at the main fuse box. Open the cable's damaged outer sheathing by hand, and see if the inside plastic-coated wires, as well as the ground, have been damaged in any way. If they have not, wrap electrical insulating tape in a spiral-like fashion around the cable, starting three inches on one side of the damaged area and working across to three inches on the other side of the damaged area. Repeat this three times.

  • Use a pair of electrical pliers to cut entirely through the cable one inch past the damaged area if the hot, neutral or ground wires have been damaged inside the outer sheathing.

  • Strip back the outer cable eight inches from the end by carefully running a utility knife blade around the outer sheathing and then pulling it off the interior wires by hand. Use the utility knife as before to strip back one inch of plastic covering from both the hot and ground wires. The wires are now ready to be installed to the electrical appliance.

Related Searches


  • "Home Improvement 1-2-3"; Benjamin W. Allen, Christopher Cavanaugh; 1995
  • Photo Credit Utility knife image by Andris Daugovich from
Promoted By Zergnet


You May Also Like

  • How to Splice Shielded Wire

    Shielded electric wire utilizes a built-in electromagnetic shield to limit the amount of electromagnetic interference between the cable and any nearby electrical,...

  • How to Repair a Satellite Cable

    A damaged or severed satellite coaxial cable doesn't happen often but requires attention when it does. Whether from a tool nick or...

  • How to Repair Satellite Cable Wire

    The quality of the coaxial cable used to carry satellite signals must remain at a high level to maintain signal integrity. Damage...

  • How to Repair Electrical Wire Insulation

    Electrical wire insulation for lamp and appliance cords is made from flexible polyvinyl chloride, and electrical house wiring insulation consists of a...

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!