Molly Ayala
Electrical cords are prone to wear and tear over time, and replacing them can be expensive. Fortunately, it is possible to fix most cords yourself. This introduction will cover the steps to splice a broken electrical cord, including cutting the cord, stripping the wires, splicing the wires together, and covering the repaired area. It is important to prioritize safety during the repair process to avoid electrical hazards.
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What You'll Learn
Cut the cord on both sides of the damaged portion
Before you start, make sure the non-damaged end of the electrical cord is unplugged for safety. If the damage is close to the plug, you may be able to retain the wire by cutting the cord at the damaged spot.
Use end-cutting pliers or lineman's pliers to cut the cord cleanly on both sides of the damaged portion. Position the pliers past the damaged portion and cut through all of the insulation and wiring in one attempt. Repeat this process on the opposite side of the damaged portion to completely remove it.
If the remaining cord lengths are pretty long, you may be able to reuse both of them. If they are too short to be useful, throw them away. For example, you could cut an extension cord in half and reuse both parts. However, for smaller cords, such as those from electronic devices, you may not need the shorter part, even if it is reusable.
Once you have removed the damaged portion, the next step is to strip about 1 inch (2.5 cm) of insulation off the cord with wire strippers. Be careful not to damage the wires underneath.
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Strip the wires and splice them together
Stripping and splicing wires is a delicate process that requires careful attention to detail. Here is a step-by-step guide to help you safely strip and splice wires:
First, ensure you have the right tools. You will need a wire stripping tool or a box cutter, wire cutters or scissors, and a crimping tool. It is important to use the correct tools to avoid damaging the wires. Before you begin, make sure the power cord is unplugged and there is no risk of electrical shock.
Next, use the wire stripper tool or box cutter to carefully remove the outer insulation of the wire. Be cautious not to cut too deeply, as you could damage the inner wires. The goal is to expose about 1 inch (2.5 cm) of the inner wires, but this may vary depending on the wire, so refer to the strip gauge if available. Once the insulation is removed, trim the copper wires so they are even and do not protrude beyond the splice connector.
Now you are ready to splice the wires together. Insert the trimmed copper wires into the splice connector, ensuring that the wires are connected by colour. For example, connect the white wire to the white wire, and the black wire to the black wire. Use the crimping tool to secure the connection by crimping the connector in two places.
Finally, test your work. Plug in the power cord and turn on the device to ensure the connection is working. If it is, you can seal the connection with heat shrink tubing and electrical tape. Slide the heat shrink tubing over the splice and apply heat with a heat gun, hair dryer, or other indirect heat source. Once the tubing has shrunk, wrap the ends with electrical tape for added insulation and security.
By following these steps, you can safely strip and splice wires to repair a damaged electrical cord.
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Cover the repaired area with a PVC shrink tube
After you've spliced the broken electrical cord, it's important to cover the repaired area to protect it from dust, moisture, and tampering during transport. PVC shrink tubing is a great option for this. PVC is short for Polyvinyl Chloride, a common form of shrink wrap. It is flexible, durable, and can be used to wrap long cylindrical products.
To cover the repaired area with PVC shrink tubing, start by measuring the length and width of the repaired area. Cut the PVC shrink tubing to the appropriate length and width, ensuring it will fit snugly around the repaired area. Slide the PVC shrink tubing over the repaired area, making sure it covers the entire spliced section.
Once the PVC shrink tubing is in place, you can apply heat to shrink it and seal off the break. You can use a heat gun or a hair dryer for this step. Apply low heat until the tubing has shrunk and tightened around the repaired area.
After shrinking, you may want to wrap the repaired area with electrical tape for added protection and insulation. This will help ensure that the repair holds up over time and that the stranded wire doesn't come apart.
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Use a heat gun to shrink the tube
Once you've spliced the wires together and covered the repaired area with a PVC shrink tube, it's time to use a heat gun to shrink the tube. A heat gun is a device that emits a stream of hot air at temperatures between 100°C and 500°C. It is important to use a heat gun or another indirect source of heat, such as a hair dryer, instead of an open flame, as an open flame can cause further damage to the cord and wire.
To start, slide the PVC shrink tube down the cord, positioning it so that it completely covers the repaired area. Make sure that the tube is large enough to fit over any solder used to join the wires. If you are using a heat gun, hold it about 5 inches (13 cm) back from the cord and move it back and forth to heat the tube gently until it shrinks and fits tightly over the repaired area. Be careful not to burn the tube.
If you don't have a heat gun, you can use a hair dryer or even a lighter, but be extra cautious to avoid burning the tube. You can also try holding and rotating the cord over a range element on high to heat the tube. Once the tube has shrunk, you can cut back any overlapping sheathing and remove any filler string.
After shrinking the tube, it's important to test the cord before using it. Shut off the electricity to the outlet by flipping the corresponding switch in your home's fuse or circuit breaker box. Then, plug in the cord and reactivate the electricity. Watch for any smoke or other problems. If the cord seems to be working without any issues, you can consider it repaired. However, if you notice any hissing or other problems, turn off the electricity immediately.
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Wrap the repaired area with electrical tape
Wrapping the repaired area with electrical tape is the final step in splicing a broken electrical cord. Electrical tape is a type of black vinyl that resists electricity, making it ideal for safely wrapping up cords. It is important to note that electrical tape is only suitable for insulating wires and preventing superficial damage from worsening. If there are exposed metal wires or frayed cords, it is recommended to cut and remove the damaged portion before splicing and taping.
When wrapping the repaired area with electrical tape, start by placing the edge of the tape over the broken casing. Then, carefully wrap the tape around the cord several times, ensuring that it is well-sealed. Make sure to use enough tape to cover the entire repaired area, creating a secure barrier. It is worth noting that electrical tape may not be a permanent solution, as it can peel off over time.
For a more durable option, consider using heat-shrink tubing in conjunction with electrical tape. After splicing the wires and applying heat-shrink tubing, you can add an extra layer of protection by wrapping the repaired area with electrical tape. This combination provides a stronger insulation and ensures that the repair holds up over time.
It is important to exercise caution when repairing electrical cords, as improper techniques can lead to safety hazards. Always ensure that the power source is disconnected before beginning any repair work. Additionally, be mindful of the potential risks associated with exposed wires and take the necessary precautions to avoid electrical shock or short circuits.
By following these steps and taking the necessary safety measures, you can confidently wrap the repaired area with electrical tape, creating a secure and safe splice for your broken electrical cord.
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Frequently asked questions
If the cord is frayed or has exposed wiring, you will need to replace the entire electrical cord. If the damage is close to the plug, you may be able to cut the cord at the damaged spot and retain the wire.
If the damage is in the middle of the cord, you will not be able to splice it. You will have to cut the cord and will end up with two shorter cords.
Before splicing the cord, cut off the damaged portion. Strip the wires and make sure to match the wire colours or the ridge side with the smooth side.
After splicing the wires, cover the repaired area with a PVC or heat shrink tube. Then, apply heat with a heat gun, hair dryer or range element.
If you don't have a heat gun, you can use a hair dryer or hold and rotate the cord over a range element on high.
