Copper Installation in Old Block of Flats: Connecting 2-Core to 3-Core with Neutral & Grounding

Hello,
I am writing to you because today one thing started to interest me, namely.

In the block of flats (old building, post-German) I have a 2-core copper installation, at home I recently replaced the installation with a 3-core one and I do not know what to do with this new grounding cable, I read a lot of comments on the forum, which makes my head completely confused, no I also know what type of electrical network I have in the block ...

I mean exactly that once the zero wire bridged with the pin, (as I mentioned the installations in this apartment, several sockets also had the zero bridged with the pin)
And now the question arises, if you connect the neutral wire from the entrance to the apartment with the neutral wire and the grounding wire from the exit from the apartment, what will happen? because at first glance it seems that it will work in the same way as when bridging zero with a pin in each socket,
but you will not have to do it separately at each socket ...
I am asking for any statements without the type "leave it, you don't know each other, idiot etc. etc." because I just asked a question and I want to get an exact answer to it, if one of the users is able to answer and explain it, please, and if not, please do not post in this topic,
greetings

Hello, you can do it, but I don't know if it makes sense ...
if someone thinks to replace the installation in the block with a new one and it will be a network with a PE conductor, you will have to transfer your grounding conductor from 0 to PE. And if you decide to use a 3-wire instead of grounding as a phase for the second lamp because you get bored with a single chandelier? Then you will write why there is no electricity in the whole house after switching on the light. I would leave this wire disconnected in your place and bridge the pin with zero as it was before

qwerty67 - sorry but I see that you have no idea what you are writing about. The best part was

Quote:

And if you decide to use a 3-wire instead of grounding as a phase for the second lamp because you get bored with a single chandelier?

The three veins usually have three colors - light blue, brown and yellow-green. My colleague qwerty67 suggests that one day you could connect the yellow-green PE to the phase and power the chandelier - you MUST NOT do something like that !!! the protective conductor must NEVER be connected to the phase. When you have sockets with a pin, they must not have this pin disconnected. Most often this pin is connected to zero in these old installations. If I were you, I would connect the PE wire with zero when connecting the old and new installations and I would not make any connections in the sockets.

If you have the 3 wire pulled into all sockets, connect it to the pin and connect to O under the board, and if you still have ground under the board, there is nothing to prevent you from installing a residual current circuit breaker. Then it makes sense, otherwise why pull this 3 wire?

As it changes the power supply to PE power in the block (I doubt it), you will connect this PE only at the entrance to the apartment, instead of zero, it will be from the block's PE and it will be as it should be.

zubel wrote:

If you have the 3 wire pulled into all sockets, connect it to the pin and connect to O under the board, and if you still have grounding under the board, there is nothing to prevent you from installing a residual current circuit breaker. Then it makes sense, otherwise why would you ...... pull this 3 wire?

Do you think that PE is just for the sake of doing a good differential?

In general, I recommend the SEP forum and this topic:

http://forumsep.pl/viewtopic.php?t=190&highlight=stare+budownictwo

goohan wrote:

I am asking for any statements without the type "leave it, you don't know each other, idiot etc. etc."

It cannot be otherwise.
You'll see how he sits down and doesn't mention you.

Thanks for all the answers and especially for the link from the user "kasaidolar" very helpful and I recommend it to others to read too.

and as for-

retrofood wrote:

goohan wrote:

I am asking for any statements without the type "leave it, you don't know each other, idiot etc. etc."

It cannot be otherwise.
You'll see how he sits down and doesn't mention you.

Finish my sentence that you quoted and draw conclusions that you did not understand in my speech.



greetings




How does it look in your eyes? can you do that?

goohan wrote:

How does it look in your eyes? can you do that?

Please do as shown in your drawing.
If you do so, you will become the owner of the TNC-S network

Check only with the meter what voltage is between your PE and earth, eg CO. Sometimes the voltage drops on the neutral conductor are so large that such a solution is forbidden.

Magister_123 wrote:

Please do as shown in your drawing.
If you do so, you will become the owner of the TNC-S network

1. Not so fast, how do you know TT is not brought?
2. As in an apartment, it is not "networks" but "installations" in the system ... next).

Now I don't know how and where to do what, I know that the neighbor in the apartment next to me has sockets in which he has bridged the "zero" with a pin. and everything works, so I guess it's the PEN cable
What do you think about it??

And how to check what is the installation? I have 4 wires coming from the pole to the meter (zero and 3 phases - this is my guess), the installation was made a long time ago, sockets without grounding. now we have made a flat on the first floor, a room, kitchen and bathroom, there are 4 circuits:



-kitchen
-bathroom
- nest room
-room light

I would like to make a box with four fuses and a differential 9 on the pattern as in the earlier drawing), someone could draw it.

Will it be ok with me identically as in the picture?

Can I give a difference only for the kitchen and bathroom?


really looking forward to any suggestions

As you already assume the differential, it should be placed on all circuits.
You probably think that there is a greater risk of electric shock in the bathroom and kitchen, but it does not mean that it is less important in the room.

According to the regulations currently in force, you are obliged to secure all circuits that you build with differentials. Also, in accordance with the regulations, the point of contact between PE and N conductors should be grounded. In practice, it is quite difficult and in the case you describe, the electric shock protection will work properly for all the circuits it covers.

OK, I will do it according to the scheme above that was posted by my friend goohan I also have 4 circuits so I will have the same.

irekr wrote:

As you already assume the differential, it should be placed on all circuits.
You probably think that there is a greater risk of electric shock in the bathroom and kitchen, but it does not mean that it is less important in the room.

According to the regulations currently in force, you are obliged to secure all circuits that you build with differentials. Also, in accordance with the regulations, the point of contact between PE and N conductors should be grounded. In practice, it is quite difficult and in the case you describe, the electric shock protection will work properly for all the circuits it covers.

Are you sure? Because something seems to me that only in the bathroom ...

My friend, how was the bathroom separated from this circuit?

I connected, tested the differential and everything works fine,
now I am waiting for my friend to make a memory, and thank you for the answers and best regards