Home Network Layout Modification: Transition from TN-C to TN-CS System in 70s House with RCDs

Hello,
I am asking for opinions on the modification of the installation system at home and in the 70s TN-C on TN-CS.
Parts of the installation, where there is no RCD yet, still works in the TN-C system (2 wires) with the bridging of the pins with the PEN conductor. They are separate circuits.
On the other hand, the layout in the basement of the house, where I have what is most important, a washing machine, a central heating stove, a gas stove, a laundry room, ironing, etc. - modified to TN-CS

In such a system, does N and PE bridging (fig) improve the safety of use and should it be done? ... because what if the PEN is broken on the pole -> house line?

A ground with a resistance of 4.91 Ohm measured by an electrician from ZE, who commented on it in such a way that I will improve their network statistics by bridging N and PE
Currently, RCDs work without this bridge and an attempt to connect the pin and the N wire in the sockets ends with a quick disconnection by a given differential of a given circuit. I have 3 for the basement itself, for the stove, a separate for the washing machine, etc.
Of course, the circuits are protected with overcurrent B16 A, sockets and B6 A lighting.

Quote:

On the other hand, the layout in the basement of the house, where I have what is most important, a washing machine, a central heating stove, a gas stove, a laundry room, ironing, etc. - modified to TN-CS

Certainly not. This is because what you can see on the drawing is an evident TT.
Between fairy tales, put stories about "improving the statistics of earth electrodes" and share PEN in your switchboard as God and technical knowledge dictates.

The drawing is not correct, read about the section of the PEN conductor and its grounding.

Is this arrangement dangerous? and if so what is the danger?
Is there a bad wire marking?

Should it be like this?

Like that.

Ok thank you for help. It's clear now. However, if part of this network will still be used in the TN-C system or (e.g. the first floor) will have sockets with the so-called PEN bridging, will such a system be compatible with this basement?
Thank you

Yes, zero from the socket to the N strip in the drawing, and the phases before the RCD.

Brivido wrote:

Yes, zero from the socket to the N strip in the drawing, and the phases before the RCD.

Not!!!
Such a connection is a mistake, because PE and N, once separated, must under no circumstances be joined again.
However, what a colleague proposes such a combination will introduce. Each receiver, made in protection class I and grounded through its foundation, and connected to the zeroed socket, will connect the neutral wire with the ground.
This is unacceptable.

To avoid this, the neutral conductors of the old installation should be connected where the PEN conductor of the building supply cable is connected.
So for a grounded PE / PEN bus.

Brivido wrote:

Yes, zero from the socket to the N strip in the picture

However, I would connect to the bus described as PE (although it could be called the PEN bus) for a simple reason ... disconnecting the bridge between PE and N gives deplorable results in sockets with zeroing.

In my opinion, this N bus in front of the RCD is redundant in this situation. It only introduces an additional non-serving connection that can take revenge. Such art for the sake of art.

If the author understood what was written, he should correct the drawing.

I just accidentally ask:
How can the author and interlocutors be sure that the distribution network is TN?

If the author even uses the concepts, talks about PEN, distinguishes between the other names, it can be passed so that he knows what he has.

Brivido wrote:

If the author even uses the concepts, talks about PEN, distinguishes between the other names, it can be so guessed that he knows what he has.

Not necessarily. Thread title "grid layout at home "suggests installation.
About the layout distribution network the author has no idea, and even less has he checked it or know where to check it.

Gentlemen, the author in the title of the topic clearly wrote: TN-C on TN-CS!
Let us focus on the question and not look for substitute topics.

Łukasz-O wrote:

In my opinion, this N bus in front of the RCD is redundant in this situation.

Over time, upgrading your installation and adding circuits that do not require an RCD in the circuit can come in handy.

zbich70 wrote:

The author has no idea about the layout of the distribution network, and even less has he checked it or know where to check it.

This is who volunteers only to the author to check if he actually has a TN-C system

paweldd wrote:

In such a system, does N and PE bridging (fig) improve the safety of use and should it be done? ... because what if the PEN is broken on the pole -> house line?

The author is a complete layman and does not understand anything about electricity.
All your translations are pointless.
That he writes about TN-C and TN-CS networks.
The quote shows that he does not understand what he is writing about.
Otherwise, he wouldn't have assumed a topic at all.

The home network is TN-C - information confirmed by ZE (letter).
Thank you for your comments, even malicious ones, because I know that you need energy like oxygen for life.
Thank you. :D

Moderated By gulson:

Users tried to help, maybe irony at times, which I disapprove of, but you can't tell them that they're not trying to help. How did you help?
3.1.9. Do not be ironic and do not be malicious with the other side of the discussion. Please respect dissenting opinion and other opinions in the forum.

paweldd wrote:

Thank you for your comments, even malicious ones, because I know that you need energy like oxygen for life.

When people finally realize that a poorly done residential installation is a deadly danger, as is a hole in the gas line and a cracked ceiling while forging a hatch to the attic stairs.

There is no room for guesswork here.

paweldd wrote:

Thank you for your comments, even malicious ones, because I know that you need energy like oxygen for life.

Author of the topic - stick to the goggles "TN-CS network".
I punched in this password - and there are a large number of patterns.
Electricity is explained on the diagrams - there is no other way.

paweldd wrote:

However, if part of this network will still be used in the TN-C system or (e.g. the first floor) will have sockets with the so-called PEN bridging, will such a system be compatible with this basement?

No malice - if you don't understand the patterns, you need to call an electrician who knows it.

Ps. I don't know any sheet music. If a musician says that I read the notes wrong, I will not say that he is angry with me.
It would be especially spiteful to note that he was doing it on purpose.

Problem has been solved. We close the topic?