The water tightness of the unused outlets is sufficient for wet rooms. For single wall outlet which is then but a disadvantage if a power supply connector should be plugged. The rubber / soft plastic casing which is intended to ensure the watertight integrity between the hinged cover and housing, and are built on very insufficient for, which makes it difficult, PSU connector insert so that the Hold socket contact safe, especially in lighter tensile load or impact load (someone who sometimes occurs accidentally with the shoes against the wall socket).
When using real Schuko particularly wet or for outdoor use designed Schuko selbige sit bombproof, and I have the impression that even the can itself, at least survives splashes.
In unsrem case, said power supply connector should be used, so only three points.
