In home wiring aluminum wiring is a hazard due to shrinkage. Whne the aluminum heats up it expands when it cools it gets smaller but holds the shape it took when it was hot. This causes horrible connections and fires and shit. Is cca immune to this affect due to the copper coating?
Also , if current runs down the whole wire in dc applications and around the outside in ac application wouldnt this be just trying to replicate the way ac current behaves in a dc environment due to the current following the path of least resistance?
IS CCA just a marketing gimmick?