Marakanetz: I haven't the knowledge to debate what you say, but again, the cable manufacturers state that it takes awhile (the break-in time) for the insulation/dielectric to react/respond to the current flowing in the conductor. And that after a time, the molecules in the insulation material (usually foamed Teflon these days) at the interface with the conductor are altered by the current flow in a way that creates even better dielectric properties than when new.
What I don't understand (assuming that's all true) is why it makes any difference to the Teflon which way the current is flowing, since it's non metallic. Probably has to do with Quantum Theory, of whaich my knowledge is rather shallow.
