What is the best way to make grounding in a private house?

Alexey asks:
Good afternoon. There is a three-phase input (380v) into the house, the switchboard itself is on the pole, the zero at the input to the shield is grounded with a separate ground, then it is installed ouzo, and then the meter went to the house. Zero itself does not come from the pillar into the house; there are purely 3 phases and zero.

Tell me how it is better to make grounding in the house, I lay the wiring with grounding, and all the wires will come to the distribution panel with the ground, but I read a lot about what to do to balance the potentials, and so that in case of breakage of the wires on the poles the voltage does not come into the house, then you need to do a separate ground loop to the house and connect all the grounding to it in the switchboard to protect yourself, or are there any other options? How right?

The answer to the question:
Good afternoon! Potential equalization and grounding are close, but slightly different things. It is necessary to do according to the TN-C-S system, of course. That is, the separation of zero is done in the shield, for this, re-ground. But then the RCD on the pole will no longer work.

I understand that the zero under the support is grounded? It’s not a fact that it’s of high quality, and most likely there, as usual, one pin was driven in.

As for the high voltage - we are talking about phase imbalance, and there is little that can be saved from it when zero is burned off at the transformer substation. Grounding is necessary first of all in order to avoid the appearance of dangerous potential on the cases of electrical appliances!
I advise you to read these articles:
https://our.electricianexp.com/en/zachem-nuzhna-sistema-uravnivaniya-potencialov.html

https://our.electricianexp.com/en/kak-razdelit-pen-provodnik-soglasno-pue.html

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Posted: Updated: 22.04.2019 1 comment
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  • Alexei
    04/24/2019 at 09:50

    Yes, the zero under the support is already grounded, three corners 4 * 40 * 4000 are driven in and connected by a 4 * 40 strip, people came to measure the resistance, everything is within tolerance, less than 30 Ohms. But over time, of course, there can be anything. I correctly understood that it is necessary to re-ground at the house and insert it into the switchboard in the house, and connect grounding from all sockets to the bus.
    What is the best way to make re-grounding_ to buy a kit made of a copper pin, or in the same way as at a pole, with corners?

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