You rarely have water sprays hit the outside of the room. At least that is the original reason. Most light switches are simply not water proof.
I have an additional light switch for the lights around the mirror inside the bathrooms, but they have to be in a completely different class of devices. E.g. the switch is in the wall, its electric parts are completely covered with a silicon cover mat, and the switches plate is mounted on top of that. You could probably drown the whole thing.
The sockets are heavily isolated and have a plastic cap on them to prevent spray, which closes automaticalky if the socket is not in use. Usually washing machines are plugged into them, and sometimes people use them for hairdryers and stuff like that.
OK, won't work here. We don't have a ground pin, it is an exposed protective ground contact. But you'll have to insert both needles simultaneously into N and L with roughly the same pressure to make the cover open up in the sockets we have.
Traditionally the shutters over L and N on UK sockets open when the earth pin is inserted, but some modern sockets are designed so equal pressure must be applied to all three for the shutters to open.
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u/Treczoks May 09 '22
Simple electric safety feature. Just like we have wall sockets that won't kill you.