TN-C Network: Cable Thickness & Differential Power for Meter to Switchboard Setup

It is not a problem to make a perfect product. But in whose interest is it?
Minimalism is a conscious choice. And the future cannot be predicted anyway.

This minimalism hiccups constantly and will continue to be reflected in this approach for several more generations.

So the ban on the use of aluminum (up to a certain cross section) is wasteful and the required minimum PEN cross-section is also not justified, because why assume a threat that cannot be predicted.

And this is what an electrician writes !!!
Thank God that standards are smarter than people.

Well, it's time to go back to post # 1

Łukasz-O wrote:

from the staircase to the blind apartment 5x6mm2 is enough.

As for the cable cross-section, I buried today at my brother in the company and found a lot of 5x10mm2 and 5x6mm2 cable too, so the costs are falling, but now the question is which to install? Most see that it writes 10mm2 and I will probably assume that, since it is already there and there will be no losses, I will protect myself for the future.

I also have a question, can I replace the strips at the meter myself, because from what I saw, they are so small that I will not stick 10mm2 there?

Łukasz-O wrote:

We are not talking about a detached house, but about a small apartment in a tenement house, where heating comes from a local boiler room or from the city.

As for heating, I will be installing a dual-function gas furnace with a closed chamber, unfortunately we do not have a connection from the city network, i.e. there is such a possibility but a few people from the community prefer to use coal ("pensioners") also the rest must combine at their own expense and tenants decide voluntarily to invest in central heating furnaces

PriweR wrote:

Most I see that it writes and 10mm2

Li only to comply with the letter of the law.
The information that a colleague is a co-owner adds a lot because a colleague may have an influence on replacing the power supply in the entire tenement house. And considering that you will strive as owners to replace this installation (WLZ), the 6mm2 is sufficient.

PriweR wrote:

The question is also whether I can replace the strips at the meter myself because from what I saw they are so small that I will not stick 10mm2 there?

What strips are you writing about? If these are unmeasured circuits, there's nothing you can do. But I will write more after answering my question.

PriweR wrote:

I also have a question, can I replace the strips at the meter myself, because from what I saw, they are so small that I will not stick 10mm2 there?

What "strips at the counter" do you mean?

Krzysztof Reszka wrote:

Li only to comply with the letter of the law

And the prosecutor is asking what?

Krzysztof Reszka wrote:

And considering that we will try to replace this installation (WLZ), this 6 mm2 is sufficient.

Not true. Many years may pass from thinking to realization.
PS
You are right that in the future it will be enough for the TN-S 5x6. And what about the so-called in the meantime?
It's easy to advise when you don't subscribe to something.

However, since the WLZ will be replaced in the future, and the installation is done "new", does the solution with the PEN distribution in the box on the cage and then to the 5x6mm ^ 2 apartment bother?

If you don't care whether you give 5x6 or 5x10, give "tense". It certainly won't hurt. Take a picture of the strip you are talking about.

opornik7 wrote:

You are right that in the future it will be enough for the TN-S 5x6. And what about the so-called in the meantime?
It's easy to advise when you don't subscribe to something.

After all, the author in the first post writes about new protections and RCDs in the housing switchboard. It follows that the receiving installation will be new with separated N and PE.

Krzysztof Reszka wrote:

Li only to comply with the letter of the law.
The information that a colleague is a co-owner adds a lot because a colleague may have an influence on replacing the power supply in the entire tenement house. And considering that you will strive as owners to replace this installation (WLZ), this 6 mm2 is enough.

Now I got lost, pack this 10mm2 as you wrote earlier and as the standards say, or use 6mm2? I own both, it doesn't matter.

In the future, we will probably carry out such a modernization of the network, so far we already have plans for the next 4 years. We have only talked about replacing the installation so far and most likely it will be in about 5 years

opornik7 wrote:

What strips are you writing about?

zbich70 wrote:

What "strips at the counter" do you mean?

After opening the meter box and after unscrewing the plate that covers the fuse at the meter, strips appeared to me
PE screwed to the housing and not used, then N (in this case PEN) connected and then to the flat and the L1 strip connected, then to the fuse and then to the flat. No tampering with the seals. I was surprised by the box over the counter with twisted cables and only for the apartment.

My point is that I will have to plug the 10mm2 cable into the N strip (now PEN) with so small holes that I will not fit this cable. The L1 wire should be connected to the b20 fuses.

Łukasz-O wrote:

After all, the author in the first post writes about new protections and RCDs in the housing switchboard. It follows that the receiving installation will be new with separated N and PE.

Exactly, I want to install a new installation with RCD and PEN division and well-assembled so that in the future I will not have problems and that I do not have to modernize the installation again when the network is rebuilt in the entire tenement house.

PriweR wrote:

After opening the meter box and after unscrewing the plate that covers the fuse at the meter, strips appeared to me
PE screwed to the housing and not used, then N (in this case PEN) connected and then to the flat and the L1 strip connected, then to the fuse and then to the flat.

Mercy!! Take a photo and zapodaj because I don't know what you're writing about.

Łukasz-O wrote:

After all, the author in the first post writes about new protections and RCDs in the housing switchboard. It follows that the receiving installation will be new with separated N and PE.

In the apartment. What about the staircase and further to the TG?

opornik7 wrote:

Mercy!! Take a photo and zapodaj because I don't know what you're writing about.

Tomorrow I will come to the apartment in question, I live permanently in another city and I have no possibility to do them at this point. As I remember correctly it is as above. I wrote but I will add a photo tomorrow.

PriweR wrote:

After opening the meter box and after unscrewing the plate that covers the fuse at the meter, strips appeared to me

What is a "meter box"?
Buddy, no offense, you take an electrician and write like a baker or a bricklayer.

PriweR wrote:

Now I got lost, pack this 10mm2 as you wrote earlier and as the standards say, do you need to use 6mm2

After all, my friend followed the topic from the beginning and wrote why 10mm2 himself.

PriweR wrote:

In the future, we will probably carry out such a modernization of the network

And that's why you can safely assume 6 mm2, as others wrote. So you don't need to worry.

PriweR wrote:

My point is that I will have to plug the 10mm2 cable into the N strip (now PEN) with so small holes that I will not fit this cable. The L1 wire should be connected to the b20 fuses.

You probably have a similar one:

So replace it with the following:

opornik7 wrote:

In the apartment. What about the staircase and further to the TG?

Probably four-wire from RG to RP WLZ. What is the problem of separating on a multi-level rosette into N and PE?

zbich70 wrote:

PriweR wrote:

After opening the meter box and after unscrewing the plate that covers the fuse at the meter, strips appeared to me

What is a "meter box"?
Buddy, no offense, you take an electrician and write like a baker or a bricklayer.

He writes as a mechanic, electronics technician, programmer.

Łukasz-O wrote:

Probably four-wire from RG to RP WLZ. What is the problem of separating on a multi-story rosette into N and PE?

Of course not a problem as long as it is 10 Cu or 16 Al.

PriweR wrote:

from the meter to the fuse at the meter I have thin wires, max 4mm2 (although I do not know if it is not 2.5mm2)

Or maybe from the fuse to the meter?
Should we continue? I get off due to the lack of complete knowledge on this topic.

opornik7 wrote:

Of course not a problem as long as it is 10 Cu or 16 Al.

A colleague exaggerated a bit, we wrote about it a few posts above (at the beginning), and the forum is full of this topic.

opornik7 wrote:

Of course not a problem as long as it is 10 Cu or 16 Al.

Well, since the WLZ from RG to RP (riser) has, for example, 6mm?, then on the multi-story rosette I cannot separate a separate N and PE conductor from the neutral terminal towards the installation of the premises?

I admit that I am beginning to misunderstand my friend.