Earlier quoted context omitted.
> You have to break open the wall to fix things The best is to build in such a way as to not have to fix them in the first place. European standards mandate passing all wiring through corrugated tubes. Builders add spare empty ones for future expansion, which makes it unnecessary to open the walls in most cases.
>European standards mandate passing all wiring through corrugated tubes. Incorrect. It's usually done, because it's a good idea, but nobody says you have to.
As an electrician of two decades, my commonest USA gripes are these:
•) grounding wires should always have insulation, too (instead of just bare)
•) modern NM isn't protected enough (neither physically nor chemically)
•) jboxes should have better wire anchoring inside, and bigger in general
•) oldwork cut-in jboxes aren't substantial enough even perfectly installed for long-term use (if you screw them to an adjacent stud they're great, but this is against code for grounding reasons).