I'm installing under cabinet lighting and haven't worked with low voltage wire before and trying to determine the best option. I'm using 18 gauge wire (stranded) to wire LED lights. In my particular situation, I have my wires coming from the power supply under one of the middle cabinets. I have about 4 more feet on the right side than on the left, so to protect against potential voltage drop, I want to run the wire from the power supply straight up, and then from that wire, connect to two separate runs (one for the left side and one for the right). My question is how to best connect the wires. I was initially thinking of using wire nuts to connect them - for example, the two positive wires on each run tied in with the positive wire from the power supply...so 3 positive wires wire nutted together. Same with the negative wires. I then read something where I'm now a little concerned in using wire nuts for stranded wire. If I do end up going that route, I'll also wrap electric tape around the nuts to help prevent any possible movement. And yes, I have nuts for the proper gauge, but I think those are always rated for solid and not stranded, but I could be wrong.
The other consideration I had was heat-shrink butt splices, but it would basically be 1 wire in one side and two wires in the other. This may be problematic because the best size I can find is 16-14 gauge. That would work I think for the side with the two 18 gauge wires going in, but maybe not for the side with just one 18 gauge wire.
Hopefully this makes sense. Any suggestions on this?