Power Cable Selection for 25kW, 200m 3-Phase Connection: Copper vs Aluminum, 4x35 vs 5x35]]>

Hello. I need help with the cross-section of the cable to the power connection. I have about 200 meters of cable to lay in the ground to connect the pole and the box at the plot boundary. The connection is to be three-phase with a power of 25kW (I am planning to build a house with electric heating. I will apply to the operator for a 16kW connection, but by laying the cable I want to protect myself against possible higher consumption. I have read many statements about aluminum wires and copper cross-sections, etc. I am a complete layman on this subject and I don't know if, for example, a 4x35 aluminum cross-section is enough or must be, for example, 5x35, etc. If someone could help me, I would be grateful. answers

Hello.
As for the number of wires, I suggest 5 because in the future the power plant may change the installation from 4 to 5 wire.
As for the cross-section, 25mm? of copper or 35mm? of aluminum is enough; Copper is definitely better but also more expensive;
So 5x25mm? Cu or 5x35mm? Alu.
Regards

Moderated By retrofood:

I advise you to think twice before giving such "advice" in the future

Hello.

And why not 6 ... lived?
In the future, the power plant may change the installation from 5-wire to 6-wire.
Regards.

Marcinzabrze wrote:

Hello.
As for the number of wires, I suggest 5 because in the future the power plant may change the installation from 4 to 5 wire.
As for the cross-section, 25mm? of copper or 35mm? of aluminum is enough; Copper is definitely better but also more expensive;
So 5x25mm? Cu or 5x35mm? Alu.
Regards

In the context of 200m distance from the connector, your proposal is ... not good ;)

Alu cable, because it's cheaper and give the cross-section with a margin. That is, as it comes out of power and a step higher. It should "touch".

Cable YKY 4x25mm? or YAKY 4x35mm?
You can do the division of PEN into PE and N at home.

Why not just look at the project?

There is no project yet. Due to the possibility of repurchasing a 4x35 mm aluminum cable, I am asking if 200 meters is enough

Hello!
maybe do the project first so that you don't have problems when you receive it
p.s. I have all 5-wire or 3-wire cables with a new installation.

Hello.

adamblonsky wrote:

p.s. I have all 5-core or 3-wire cables with a new installation.

And I have /lived/
2-buttons;
3-splines of single lamps and sockets;
4-chandeliers, cable lines and some 3-F motors;
5-storey sub-distribution boxes, kitchen stoves, etc.;
And I'm not proud

If you ask buddy party show about an Al cable with a cross-section of 35mm?, I answer that it is much too "thin", because the voltage drop on it will be over 2.5%.
And according to the standard, it should be up to 0.5%.

With this power, distance and ALU, it's about 120mm?.

impra-show wrote:

Hello. I need help with the cross-section of the cable to the power connection. I have about 200 meters of cable to lay in the ground to connect the pole and the box at the plot boundary.

If there is a distance of 200 m from the pole to your plot border, it will be done by an external company commissioned by the local energy company and the only thing you can do is agree with the contractor to increase the cross-section of the power cable.

From the pole along the road to the border of the plot is 50 m, then on two plots an easement of access is established and it is a section of 150 meters to the border of my plot. All connection works will be performed by the company indicated by me, and only the connection to the pole, probably from the ZE (I do not know exactly). Regarding the project, I know that if it decides to, for example, 4x35, it will be approved, so it's not a problem. I mean only purely technical aspects, if the connection will be 25kW, I will turn on the stove, 9kw washing machine, heating, etc. The cable I am talking about will withstand it and will I have electricity or Egyptian darkness at home A colleague proposes a 120mm cross-section, I do not question anyone's knowledge (I do not have one myself in this topic) but is this not an exaggeration?

impra-show wrote:

All connection works will be performed by the company indicated by me, and only the connection to the pole, probably from the ZE (I do not know exactly).

Find out carefully, because the company you want to hire should have authorizations from the local ZE for this type of work, because after the investment is completed, ZE takes over the entire connection cable on its property and takes care of its operation.

Have you talked to ZE about joining? For me, I declare the required power, and they put a meter on me and the ZE has to pull the cable to the meter. Will you put the meter on a pole 200 m from the house?
best regards.