How to ensure electrical safety in a private house?
I read a lot about TN-C systems and others and realized that TN-C-S could not be done because introductory and counter under the seal, and after them it is impossible to separate PEN. Question: what maximum actions need to be performed, what kind of switching devices and jumpers should be installed to ensure electrical safety in a private house. My home network - an input cable of 2 to 10 copper enters the ASU in the house on VA 25A, then Mercury, then the phase wire is 6 square meters. on 6 unipolar ABs through the comb, and conductor P zero with a wire of 6 square meters. to bus P zero. The PE bus is connected to the protective circuit with a 10 kV conductor. under the bolt. All protective conductors of sockets come to it and the shield is grounded.
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After the counter it is impossible to separate, as this is fraught with negative consequences. In the event of a zero loss to the separation point, phase voltage will appear on the housings of electrical appliances. Also, you can’t break the grounding conductor with a machine, and in your case, the conductor comes to the machine, and then after the meter you separate it. In this case, also in case of damage to the machine or the counter, life-threatening potential will appear on your electrical appliances.
If grounding is not provided in your power supply network, then it is better not to use it, since it is life threatening.
In TN-C-S networks, grounding can only be used if the line is in a normal technical condition, a sufficient number of repeated groundings are provided, the groundings themselves comply with the requirements, and the zero joint conductor of the PEN line is resistant to mechanical damage. If you do not have such information, then accordingly, making grounding at random is fraught with negative consequences.
As an option, you can mount an individual ground loop - this is the TT ground system. In this case, the ground loop operates separately from the mains and does not connect to the PEN power cable.
Also, for safety reasons, residual current devices must be installed, but it should be borne in mind that in the absence of a working ground they will not fully protect against electric shock.