A few weeks ago I read about a German guy who moved into a new flat. He set everything up and it seemed to work. After a while he wanted to move the coax to the TV and unplugged it. When he did, the TV lost power.
Upon closer investigation he discovered that the socket was earthed to the neutral (legal in Germany until 1973) but the previous tenant had managed to disconnect the neutral upstream of the socket (the feed was looped across the ceiling and when somebody took the ceiling light down, they broke the neutral connection). This had gone unnoticed, because the neutral terminal was connected to the earth terminal, and the earth wire from the plug was connected to the screen of the coax inside the TV (large class 1 plasma TV).
