Just wanted to say something about RCD's. They do not switch off slower at a smaller leakage current!
A 30mA RCD kicks in at about 25-30mA leakage, depending on make.
In most EU countries a 30mA RCD is only required in new installations, there are still millions of homes
without RCD protection. I love the RCD in my workshop, it has saved me from some nasty bites.
You can get them with 10mA IdeltaN, too, if you want to play it safe. Some electricians I know recommend
a dedicated 10mA RCD for bathrooms.
The problem is "normal" people don't understand what a RCD does, and that it is different to fuses or MCB's.
Add to that the cost of 40-50 EUR and the cost of installation and you can imagine how many people have
one installed...