I ran a bit short while installing an invisible dog fence. They supply 20 gauge PE insulated wire. Another reel of their wire is $25. A reel of 14 gauge regular wire is $12.
The instruction book cautions against mixing sizes. What difference would it make? I am guessing that the heavier wire might radiate a bit wider field, but I can live with that. Any other problem you can see? I don't know what normal insulation is but guess it is PVC? That is no more likely to deteriorate in the ground than PE, is it?
Any insights would be appreciated. Once it is in the ground it is too late.
Also, do you think the waterproof wire nuts that HD sells will be okay? The ones that came with the kit are more elaborate, but also bulkier and more difficult to bury.