There was a time here in the states, (and im sure on your side of the world as well) where houses were wired as "2 wire", meaning a hot and a neutral, or in your case two hots, and no ground. Some folks eventually replaced the outlets with three wire outlets, but there was no ground to hook up. It was just so the newer appliances and modern conveniences that came with three wire cords could be hooked up. There are still rural areas here within the states and some of the older towns that still have houses this way. And from what you described earlier your house didn't have a ground going to the panel. A proper ground rod here is at least 8' long and a #6 copper conductor run from the grounding bar to the ground rod. And these days also includes a ground running to a piece of rebar in the slab, along with a bond to the water main. Electricity is always trying to get back to the source (where it is generated). And a proper grounding system not only helps, but makes it just a bit safer.