And some low voltage wire connectors might be a good idea instead of just wrapping them around each other. Less chance of it coming loose again.

I would go with greg. Get a butt splice connector (available at home imrpovement and auto parts store) and use that. It will insulate things and make a better, longer lasting connection.

Heat wrap on first, butt splice, crimp, move heat wrap overtop, and shrink with hair dryer. Enjoy!

I have seen the product listed as heat shrink tubing. You can buy it at auto parts stores or home stores. It will give you a very neat, clean looking splice.

As already explained, untwist the copper wires, and also zip the two wires apart a little more so that you can slip a piece of heat shrink tubing over each of the two wires on one half. The piece of tubing should be about 1/2" longer than the butt splice connectors you buy (or the section of wires you twist together), and big enough in diameter to slip over the splice. Make the connection of copper wires, then slip the tubing back over it so it covers the splice and extends on the wire to each side. Then heat the tubing (I use a butane charcoal lighter), by moving the flame back and forth across it, and you will see the tube shrink and adhere to the splice and the wires.

They also sell heat shrink tape, but I've never tried using it.

Bruce

I would put the heat-shrink tubing over one of the wires, solder them together, then slide the tubing over the splice. I've seen the crimp joints fail, especially in a situation like this.

And I've seen crappy solder joints fail. It's a lot easier for most people to make a good crimp connection than a decent solder one. Some solderless connectors are better than othres.

The pro way is wire connectors ...you still can use heat shrink tubing...suggestion: use the thinner you can for each wire than one big enough to wrap both...that will look better and will work just fine...enjoy!!!

IIRC, they make heat-shrink butt connectors.

When you have multiple conductor cable and need to splice both or all of the conductors, it's a good idea to offset the conductor splices so they're not right next to each other. Like this:
----------=====-------------------------
--------------------=====---------------
------------------------------=====-----
(The - are the wires and the = are the insulated splices)

That way if the insulation you use on the splices should fail, the splice will be next to an insulated wire, not another splice. It also makes the finished product a little less bulky, though you trade that for greater overall length.