Who Here Makes Their Own Power Cables?

Cryogenics and wire directionality are equally germane to SQ as stranded vs solid core. At least that’s how the big boys roll. 

pop quiz - is directionality applicable to stranded wires?

Part 2 - How would you determine directionality for power cord wire?

Sometimes yes and sometimes no depending on how the wire was produced. 

You must listen and test for audible changes.  So your ears determine as always. 

I hope I pass and not flunk out. 

Whoa! You mean there are other ways of producing wire other than drawing it through a die?

Guess I flunked. I use a lot of Duelund stranded and tinned copper wire in cotton for ICs, speaker cables, USB and DC cables. No markings on this Duelund wire. The newer 600v 12 gauge bulk wire for power cords has printing on it. Heck if I have detected a difference in sound in any of Duelund wire in one direction or the other. 

Gets complicated as break in also plays a role.