How to Repair Damaged Electrical Wires
What is the best way to repair damaged electrical wires? Methods for Repairing Damaged Electrical Wires.
Repair Electrical Wiring
- I just wired my outbuilding sub panel and the electrical circuits.
- The dry wall installers chewed up the wires in a few boxes with their router when doing the cut-outs which I take to be a pretty common mistake.
- I’m curious to know what the electrical code allows in this situation.
- There are some wires that are just nicked in the sheathing, some that are nicked into the copper wire, and one that’s cut nearly in half.
- For the metal nicked or cut wires I assume I have to cut and splice them with a wire nut, but in a couple cases the cut wire will be pretty short certainly not the 3″-past-the-face-of-the-box or whatever NEC requires.
- Since this is new construction, will I need to cut into the wall for those bad cases or can I get away with some other remedy? For the sheathing-only cases, can I wrap with vinyl tape and call it good? I used all metal boxes with cable clamps, so I can’t pull any more slack into the box.
Additional Comments: Thanks!
Background: Casey, a Handyman from Bellingham, Washington.
Thanks for your electrical question Casey.
Methods for Repairing Damaged Electrical Wires
Application: Repairing Electrical Wiring.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrician.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on the personal level experience and ability to work with tools and access to the wiring.
Precaution: Identify the circuit, turn it OFF and then Tag it with a Note before performing any wiring.
Notice: Installing or repairing electrical wiring should be done according to local and national electrical codes with a permit and inspected.
Special Materials: Install a properly sized wire connectors, anti-corrosion ointment, electrical tape, junction box and blank cover.
Repair Damaged Electrical Wires
Example of Repairing Wire Damage:
- Wires Damaged During Construction
- I been through this situation several times where electrical wires get damaged during the installation of dry wall.
- Unfortunately, this can occur when drywall installers use a router which can cut into the electrical wires and cause damage.
- Basic Repairs with Electrical Tape
- Use electrical tape to cover up the nicks made to the wire insulation.
- Inline Splice Repair for Wires that are Cut Short
- Inline barrel crimp type splice connectors work well where the wires may be cut short.
- Use a wide crimping tool which will provide a good crimp of the spliced wire.
- Materials and Labor for Repairs
- Consider keeping track of your repair time and back charge the drywall contractor who damaged the wire, or just deduct it from their final draw.
More about Splicing Electrical Wiring
Electrical Code Articles for Home Wiring
Electrical Code Directory covering the methods and installation of electrical boxes and electrical wiring.
Electrical Junction Box Splice
Electrical junction box splices can be made safely when you understand the method. This example will show you how its done step by step and shows how to make a junction box splice and the related electrical codes.
For more information about Home Wiring
Basic Home Wiring Diagrams with Pictures.