Why is the system unit shocking?

Question

Iron

When I touch the system unit, it sensitively beats with current.
How to ground it?

Answer 1

In a city apartment, grounding is quite difficult to arrange. You can run a wire from the grounding contact of the socket into which the sys-block is connected to the access shield - there connect it to the ground bus. It looks like your PSU is faulty...

Answer 2

1. Modern SNIP require wiring in new apartments to be wired with three wires, and sockets to have a third grounding contact. If you have just such an apartment, it is not a problem to reliably ground it, and for any modern equipment (computers too) this happens by itself.
2. In each pair of wires suitable for any outlet, one is grounded, and this is true even for old housing. If you don’t believe me, look into the shield on the landing, where this wire is connected directly to the steel frame of the shield. But it is difficult to use this fact, since the plug can be inserted into the socket in two ways. Is it possible to connect with a separate non-switchable wire ...
3. The metal case of the computer is connected to both 220 volt power wires through small capacitors. Since one of these wires is ground, it turns out that the case is constantly energized, equal to half of 220 volts, i.e. 110. For a person with increased sensitivity to electricity, this may be enough for unpleasant sensations. Maybe this is your case, and there are no malfunctions in the computer?