I would be both with building wire, and other electrical and electronic applications - and plumbing.....
Now, I'm just gonna toss out something I learned, when learning how to solder, and was explained in very simple terms considering what could be some complex math..... When making a good joint, the area of contact should be equal or more than the circumferance of the conductor. As the therory goes - the electrical path in AC is concentrated in the outside circumferance. Depending on the frequencey. Let the debate begin on
skin effect elsewhere. According to that, the contact area would only need to be that much...
That "line" which does consitute an "area", would only need to be the same or more than (in length) than the circumferance of the conductor, or largest one for an effective circuit. And if that "line" were 3.14 times the the radius squared it would be equal to the cross-sectional area.... (Which according to that therory, is not totally nessesary...)
http://www.mathopenref.com/arcsector.html
So if the joint (that line - whatever shape) were equal to the cross-sectional area, it would be far greater than the circumferance. (About 6x's roughly)
http://www.mathopenref.com/circumference.html
So if you have 6 wraps, as you would with say a western union with 3 wraps on each side - you would have exceeded the cross-sectional area. And like-wise if you twisted two lengths of wire 6X's it circumferance, or 3.14XR squared..... Mechanically without solder.... That held in a wire nut, or in solder will be about the same resistance of the wire. (But will still show up in a TDR graph as a reflection.)
I know there is more exacting math to this - but hey - its Sunday....