How to Change a Bad Splice

In this video, we change out a bad splice that we have. We will be using shrink tubes to replace the ones that are currently used with wire nuts. Wire nuts and electrical tape are often used to keep moisture out, but electrical tape can become brittle and is not a good sealant.

To start, make sure that the electricity is turned off before you begin. Safety first!

Once the electricity is off, cut the old splice out and set it aside. We will be using something called butt slices for the new splice.

Next, pull the two wires apart to create some room for the new splice. This will make the process easier.

Now, let's strip each end of the wire approximately three quarters of an inch. This will expose the wire for the new splice.

After stripping the wires, you may notice green corrosion on the wire from the previous bad splice. This is a sign that the old splice was not effective.

Now, let's do the crimping. Look closely at the wires and you will see that one side has lettering or writing on it, while the other side has multiple ribs running along the wire. Keep all the wires with writing in one splice and all the ribbed wires in another splice.

Before crimping, make sure to slide the shrink tube onto the wire. This is an important step that should not be skipped.

Take the little copper piece and slide it over the wires. Make sure it is all the way in. Then, use crimpers to secure the wires together. Start with one crimp in the middle to hold the wires in place, and then crimp the entire piece tightly. Give it a little pull to ensure that the wires are secure and won't slide out.

Repeat the same process for the other side of the splice.

Now that both sides are crimped, slide the shrink tube over the copper piece. The copper piece has two corners that can be used to evenly distribute the shrink tube.

Using a heat gun, start by heating the middle of the shrink tube. Move the heat gun continuously to avoid melting or burning the shrink tube. As the shrink tube shrinks, you will see the seal forming. Work your way out from the middle to ensure that the entire shrink tube is properly sealed.

Once both sides are sealed, be careful where you place the heat gun as it will be extremely hot. Avoid placing it on an extension cord or any other flammable material.

And there you have it! A nice waterproof splice using shrink tubes and butt slices.