Oh, this is one of my pet peeves:
This requirement is in the Swedish regulations, but then the authority issues a statement: "Ignore it. It's not the way we do things here in Sweden." A blown main fuse is common source of problems and people have difficult to find it.
This isn't the only case where the authority asks you to ignore its own rules: Same goes for mains bonding and earth wire to street lights. The latter requirement was dropped since that is not the way things are done. New regulations will be issued next year. These will only consist of fifty pages and will not contain anything technical at all. Pretty hard to violate those rules...
