TN-C-S with the ground wire bonded at the house entrance. As far as I know no ground rod, only an old lead water pipe bonded with an old rusty clamp.
There's a single long piece of NM cable running from the panel to the receptacle behind the dishwasher, so not much room for mixups (total wire run maybe 10m, the panel's located in the hallway, just outside the kitchen door). The dishwasher is fairly new (2 or 3 years I think). Part of the wiring is NYM cable run in surface-mount conduit, rest is same cable buried in plaster.
