Electrical installation of a single-family house - diagram of the board, securit

Hello

I have a few questions about electrical installation in a single-family house. I would like to estimate the costs that await me and supplement my knowledge on the implementation of such an installation.
Installed power for the whole building Pi = 18.0 kW, Po = 16.1 kW, Io 24.0 A. The YKYżo 5x10 cable was selected from the cable joint to T1, whose Idd = 62 A and secured in the joint; pre-meter 3 x Bm Wtz 40 A and pre-meter R303 B - 25 A.

In the diagram behind the FR, the wires go to the RCD of individual "sections", then to individual circuits. In addition, the diagram shows the 4xdehnguard t275 surge arrester. S303B40A is visible between the FR and the limiter, why this overcurrent switch? Or am I reading this diagram wrong? Moreover, the draft describes the R303 B - 25 A post-test protection. How does this compare to the RCD of a 3-phase socket in the garage (40A) and the previously mentioned S303B40A? 25 A fuse will work after RCD 40 A and S 40 A?

The next question relates to the RCD (4 pieces). Should 3-phase RCDs (4xDY6 - hence I conclude that they are to be 3-phase) be installed in circuits with no 3-phase sockets, or 1-phase sufficient?

I am also interested in the issue of emergency power supply from the aggregate and its connection in the switchgear (TN-S receptions). It requires a special switch (and an aggregate?), But I would like to know where to mount it - behind the FR? How to choose it and what are the formal issues? The person collecting the electrical installation makes an appropriate annotation in the protocol. Do I have to have a special consent from the power supply? I would be grateful for introducing the topic.

In terms of grounding (TN-S). Will I have the PE protective conductor in the junction box since the design suggests a 5x10 mm2 cable? In a friend's house, there is a bridge for the PE wire from the N wire, but it is probably a different network system - TN-C? Or maybe the electrician did it because it was comfortable for him? I know that there are no hoops or grounding rods there, and the project is probably as it should be for me (TN-S).

Do I have to run it in a PVC pipe when leading the power cord to the building, or is a ditch of min. 70 cm - sand layer - wire - 20-30 cm soil - warning cable foil and earth? I know it's an earth wire, but in practice what does it look like? The same issue will apply to the power cord of the entrance gate (drive and lighting) and the exit to the outbuilding.

A lot of it and maybe a little chaotic, but I will appreciate any help.

marcin_uli wrote:

YKYżo 5x10 cable selected from cable connector to T1,

Enter the distance between ZK and T1. Was a foundation earth electrode made during construction?

Distance of about 20 meters. The foundation earth electrode was not made during the construction ...

marcin_uli wrote:

The foundation earth electrode was not made during the construction ...

Why? I know .....

5x 10 cable unnecessary expenditure.
RCD 3f for 1f circuits - error.
Protection for limiters - redundant.

marcin_uli wrote:

This requires a special switch (and aggregate?),

Yes, in addition, the fact of installing the generator should be reported to the power industry.

marcin_uli wrote:

Do I have to run it in a PVC pipe when leading the power cord to the building, or is a ditch enough?

The cable, not the conductor, is laid in the ground, at the crossing with other armaments, in protective pipes.
If you want to lay the cables shallower at your own risk, use hard pipes, not Aroty.
PS
Kumaty electrician will cover the topic but something ........

marcin_uli wrote:

I am also interested in the issue of emergency power supply from the aggregate and its connection in the switchgear (TN-S receptions). It requires a special switch (and an aggregate?), But I would like to know where to mount it - behind the FR?

For me, the 3P + N power-generator switch has replaced the FR. The manual mains-generator switch is nothing more than an isolating switch, only with 3 states I-0-II. Mirroring the two cameras next door is a bit pointless. Remember to buy a switch with a time delay for the N track, because N should also be interrupted as a working wire, i.e. complete isolation of the generator from the public grid. Separation of PEN into PE and N before the grid-generator switch.

emigrant wrote:

For me, the 3P + N power-generator switch has replaced the FR.

And what security did you apply? Remaining those calculated for the web? Well, congratulations ... Do not let the tester into the house, because if he were, I would ask the Electricity Board to cut off your power supply until the installation is safe.

opornik7 wrote:

5x 10 cable unnecessary expenditure.
RCD 3f for 1f circuits - error.
Protection for limiters - redundant.

I will add too few circuits to the kitchen and no circuits for devices above 2kW.

mawerix123 wrote:

opornik7 wrote:

5x 10 cable unnecessary expenditure.
RCD 3f for 1f circuits - error.
Protection for limiters - redundant.

I will add too few circuits to the kitchen and no circuits for devices above 2kW.

Most likely it is a typical project for PnB purposes, having little to do with the detailed design.

marcin_uli wrote:

I have a few questions about electrical installation in a single-family house. I would like to estimate the costs that await me and supplement my knowledge on the implementation of such an installation.
Installed power for the whole building Pi = 18.0 kW, Po = 16.1 kW, Io 24.0 A. The YKYżo 5x10 cable was selected from the cable joint to T1, whose Idd = 62 A and secured in the joint; pre-meter 3 x Bm Wtz 40 A and pre-meter R303 B - 25 A.

Where did you get the data? Where did you get the drawing from? Is it an individual project? If it comes from a typical project (the lack of a foundation earth electrode indicates it), then little can be estimated, because first the detailed design of the installation should be made. So close to reality, not lunar.

The data and drawing come from the house plan, and the design is bought, so to speak, "off the shelf". So I am to understand that the diagram is only illustrative? Can I, with an electrician, modify the installation "as I like"? In the sense of adding and modifying circuits, instead of 5x10 throw 4x10, do not mount S303B40A, which is only in the schematic with FR, go to RCD right away? If a network switch is used, should the S303B40A overcurrent switch be located behind it, and only then the departures from, for example, a distribution block to individual RCDs? Likewise, omit 4 3-phase RCDs and use 2 3-phase and 2 1-phase? Nobody will verify it during collection?

So you have the answer to your questions. Put the tip off on the shelf until you pick up the building. Invite a thinking electrician, tell him your expectations about the installation and he will know what and how to do it. Installation must first and foremost be user-friendly.

marcin_uli wrote:

Nobody will verify it during collection?

Exactly.