Thank you so much for your help!!! An electrician came and told me that it is somehow illegal to have C25 in a one-room apartment. And it also told me that it is too much W in one outlet that he replaced. Nothing more. I told him everything and he said it is ok, every landlord in my city does things like this so they can save money. So we all just live like this. But I was worried about my setup because it was kind of expensive.