TL;DR: It's a method of joining two wires that won't pull apart under load; the wire will break before the splice comes apart. Add solder, trim any pointy bits, and you have a NASA approved joint.
I'm trying this now with 20ga solid core, at least without solder it is still pulling apart even with more then 6 wraps. It could be my technique, still working on it. Thanks.
Thanks! I had this one and the Wire Wrap somehow linked in my mind but forgotten the name. Must have seen them both described on the same page a long time ago.
TL;DR: It's a method of joining two wires that won't pull apart under load; the wire will break before the splice comes apart. Add solder, trim any pointy bits, and you have a NASA approved joint.