Just wondering, when I look at my current rental, (an basically all other houses I had seen so far), you get your main 30A separator, if anything's blows you put a new (fuse)plate in.
In the more advanced installations, you have usually a box with a couple of fuses (20A, seems to e the Standard), and than usually about everything hangs on that 20A fuse, no matter what kind of wire is actually chosen.
Doesn't matter much anyways, the common practice is anyway to operate the 3000W table grill from the socket with 2 extensions where one of them has less than 0.75mm2.
I got myself now this fancy box, with RCB, 10 fuses, 2 of them with only 10A, that's why I choose it, nowadays with LED's you could light up the whole f....g village with 10A.