Selecting Correct Cable Type & Cross-Section for 12kW Ground Source Heat Pump Installation

Ladies and Gentlemen,
soon I will have a 12 kW ground source heat pump installed. According to the contract with the installer, the power supply is on my side.
I want to do the routing of the cable from the main switchgear to the heat pump switchgear in the boiler room myself, and the connection of the cables in both switchboards and the installation of protections will be done by an electrician during the 5-year inspection of the installation, which I have to commission soon.

Please tell me what cables (cross-section and type / marking) I should buy (I will run in plastic trays):
- main 3f between the main switchgear in the house and the switchgear in the boiler room (about 10 meters; I would prefer a cord over a wire if allowed)
- connection (about 2 meters) of the PC compressor to the switchgear in the boiler room (compressor: 3 ~ / PE / 400V / 50Hz; C10 protection; starting current 26A; max power and current consumption: 9.44 A? 4.80kW)
- connection (about 2 meters) of the PC heater to the switchgear in the boiler room (3 ~ N / PE / 400V / 50Hz ? B16; 9kW)
- connection (about 2 meters) of the PC controller to the switchgear in the boiler room (1 ~ N / PE / 230V / 50Hz ? B10)
Thank you in advance.

Weird. The installer did not suggest, at least a little?

elpapiotr wrote:

Weird. The installer did not suggest, at least a little?

He prompted, but hesitantly (claims that he does not deal with electrics) and I have doubts about what he said (e.g. the compressor protection was given by C20, although the manual says C10 ...; the compressor cable suggested 5x4 and the heater 5x2.5), so I'm asking here again. I do not know what the main cable should be between the switchboards (5x4 or maybe 5x6 is enough if the heater and compressor can work simultaneously). And can I freely choose between YDY, OMY and OWA?
Asking for a hint.

And in the event of a breakdown and warranty or post-warranty repair, you will be crammed between the vodka and the snack, that is, between the electrician and the cooler. Does your connection capacity allow for such devices, voltage drops checked?
Regards.

KonradGatek wrote:

And in the event of a breakdown and warranty or post-warranty repair, you will be crammed between the vodka and the snack, that is, between the electrician and the cooler. Does your connection capacity allow for such devices, voltage drops checked?
Regards.

I will not, because the cable will meet the required parameters. The connections will be made by an electrician, the pump will be started - after checking the connection, the service. Yes, the connected load is sufficient.
Please give me a hint.

gieu wrote:

The connections will be made by an electrician

If an electrician will do it, he should provide information on this topic and then you can discuss.

gieu wrote:

Please tell me what cables (cross-section and type / marking) I should buy (I will run in plastic trays):
- main 3f between the main switchgear in the house and the switchgear in the boiler room (about 10 meters; I would prefer a cord over a wire if allowed)
- connection (about 2 meters) of the PC compressor to the switchgear in the boiler room (compressor: 3 ~ / PE / 400V / 50Hz; C10 protection; starting current 26A; max power and current consumption: 9.44 A? 4.80kW)
- connection (about 2 meters) of the PC heater to the switchgear in the boiler room (3 ~ N / PE / 400V / 50Hz ? B16; 9kW)
- connection (about 2 meters) of the PC controller to the switchgear in the boiler room (1 ~ N / PE / 230V / 50Hz ? B10)

Assuming the network layout is TN, and the IPZ on the main switchgear is at the level of about Z = 0.5 ohms, then:
If the installation is only indoor (without output to the outside), the supply cable from the main switchgear to the switchgear in the boiler room can be YDY 5x6.
I assume the protection of this cable in the main switchboard as a switch disconnector with gG32A fuse links.
That's why I use security and cabling:
In order to protect the compressor, a miniature circuit breaker of the character. C10A. YDY 5x2.5mm? power cord.
The 9kW heater is powered by a miniature overcurrent switch. B16A. YDY 5x2.5mm? power cord
Power supply of the PC controller to the switchgear in the boiler room - plug socket, protection About char. B16A. YDY 3x2.5mm? power cord.
One should also remember about the appropriate execution of the protection with the use of RCD type A 0.03A.