Which grounding is better for a private house: TN-C, TN-C-S or TT

Roman asks:

Hello. I decided to partially change the wiring in a private house, since the old one is already worn out and dangerous. We needed the most budgetary option. I made new cables in the cable channels only for the tile (with a separate line from the meter with a 3-wire cable), and one highway for the bathroom and additional sockets for the main and summer kitchens (also with 3 cores).

It turned out 2 new outgoing lines from the flap. All the light in the house, as well as the sockets of the rooms and the hall, remained in the old version. Everything is still new, because I can not dare to connect in any way. Can't choose a grounding system.

The entrance to the house is 2-wire, that is, according to the old conventional TN-C system, there is no grounding in the house.

Doubts are as follows: It is scary to convert into the TN-C-S system, because the street line from the TP is not a sip, but bare aluminum 4 wires, and in the event of a break in PEN somewhere on the street, all the current of the neighbors that will follow me along the highway, as far as I understand, will go through my grounding; if I am not at home, it will be bad.

I also don't want to make an independent ground loop according to the TT system, since it is expensive and difficult, you will have to buying ouzo for each outgoing line from the shield, and this is expensive, and making a potential equalization system is also hard. I wanted to leave everything as it was, leaving the TN-C system without digging in a new ground loop, but simply zeroing out the sockets where 3 wires go.

But here it is also scary to nullify, because, again, when the PEN breaks on the street, the buildings of all the nullified equipment will be under stress, as far as I understand, and ouzo here will not save you from defeat in this particular case. Please tell me dear electricians how to act competently and safely, and so that a small repair of the wiring does not turn into a disaster?

Hello! With TN-C-S, even if you are at home, it will not be too good. A zero break can also occur with a self-supporting insulated wire. I did not understand your concerns about TT. There are no special differences in the shield, you just do not ground the input zero. What is difficult and expensive? Why an RCD for each outgoing line? With TN-C-S, don't you have to do this? And you don't have as many lines as I understand.

TN-C - it is, as it were, prohibited by definition, and if you are going to do this already, then why are you asking? The RCD will also save when zeroing, if you initially leave the TN-C in the dashboard and make two zeros and will not combine them after the RCD. And there is a chance that it will save in the two-wire, although this is prohibited.

Do TT.