DaasYochid: thank you for the link!
great to see that the Avnei Nezer deals with that question! In actuality, it has little bearing on everyday life as tosefos clearly does not allow building or fixing a house on yom tov.
However, it still may have significance for electric currents- even if you hold like the Chazon Ish that it is “boneh”-if you hold like the rishonim that there is no boneh for “keilim” Unless you accept that electric currents are not keilim because they go bsck to the electric generators that may be considered more like houses. But this is a question for another day.