Converting Aluminum Cables to Copper: A Theoretical Approach for Home Meter to House Wlz

As in the topic, I would like to know how aluminum cables are converted to copper. Currently, purely theoretical considerations, I would like to change the Wlz from the meter to the house, the old one is aluminum, it has already burned down a few times and the enea is doing just to connect recently, as they were, they told me that it will need to be replaced because there is nothing to "stretch" from the lack of stock under the meter. greetings

The cross section of a copper conductor gives a degree smaller than that of aluminum.

Give 4x10mm2 and sleep well.

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Tom-el wrote:

I would like to change the wlz from the meter to the house, the old one is aluminum

A friend will not find a ready conversion factor because there is no right to be.

stanislaw1954 wrote:

The cross section of a copper conductor gives a degree smaller than that of aluminum.

The fact that it works and that it does not work well, depending on the cross-section, does not prove anything.

Wlz in the ground or in the air?
Below I enclose an example of a long-term load capacity table for Cu and Al with regard to earth and overhead cables. The load capacity depends on the construction of the cable and the environment in which it will work.
More valuable information can be found in the PN-IEC 60364-5-523 standard. But it's more for designers.

djlukas wrote:

Give 4x10mm2 and sleep well.

And how do you know the power of the ordered colleague and what security measures that make the conversation with such advice?

Wlz in the ground connection power 3-phase protection 63A

Tom-el wrote:

Wlz in the ground connection power 3-phase protection 63A

Still the length of this cable would come in handy.

.Jack wrote:

The colleague will not find a ready conversion factor because there is no right to be like that .

Why? For the same length of conductors, the same conductors (and this is what the author of the topic meant), their cross-sections are directly proportional to the resistivity of Al and Cu. Of course, the conversion will be purely theoretical because even the minimum cross-section requirements must be met. Nevertheless, such a conversion table could be compiled.

Somehow I can't imagine a 4x16 cable / wire burning out of myself.
There has to be a reason.

rafi84 wrote:

And how do you know the power of the ordered colleague and what security measures that make the conversation with such advice?

Because he wrote that it was home and nothing else. So what could this assignment have.

Buddy, the connection power of 40 kW is a farm. I increased the power from 32kw. Buddy, you can't imagine a burned-out cable, you also know it, I didn't believe it, it seems that it's a thick cable. The fault was told to me by the power plant fitter because of the creep phenomenon and loose (or loose) clamps. It got so hot that they replaced the meter with a new one. If it helps, the length of the old cable is 55 m in the ground and about 2 m in the house (crossing the foundation with the floor and to the switchgear). Connector at the border of the plot ZK. The power cable to the connectors comes from the overhead line on the 2nd side of the asphalt.

djlukas wrote:

rafi84 wrote:

And how do you know the power of the ordered colleague and what security measures that make the conversation with such advice?

Because he wrote that it was home and nothing else. So what could this assignment have.

And what about this? You threw the cross-section like a bricklayer with mortar.
I do not go below the "sixteen" Cu at the connections. Dycha is currently good for housing

djlukas wrote:

Because he wrote that it was home and nothing else. So what could this assignment have.

Buddy Djukas, you wrote well.
The author forgot to add a threshing barn to the house.
What question, such an answer.

A conversation between the master and the coachman on the way home.
- Janie, how are you?
- Everything's all right, only the dog, Kruczek dead, ate and died.
- where does this carcass come from?
- the cows in the barn got ashes ......

Buddy, how can you paste a photo.

If it is a farm and there are / will be electric motors, then when selecting the cable cross-section consider the voltage drops at the starting current of the motors. Too much drop may cause the engine to "stall".

The motor starting current can be read from the motor card or calculated from the motor nameplate data. It can reach a value equal to 8 times the rated current.

For example: a 22kW motor has a nominal current of 40A, its starting current can reach the value of 8 * 40 = 320A.

The permissible voltage drop U [V] amounts in [%]:
Light start - 35% (for 400V it gives a 140V drop)
Heavy, frequent start - 15% (for 400V it gives a 60V drop)
Heavy start, rows - 10% (for 400V it gives a 40V drop)

Here is a fairly handy online calculator: http://calcoolator.pl/spadek_napiecia_z_pradu_jednofazowy_trojfazowy.html

Tom-el wrote:

Buddy, the connection power of 40 kW is a farm. I increased the power from 32kw.

So this is where you had to start the topic, not just write that it is home.
As colleague Cyrus2 wrote

CYRUS2 wrote:

What question, such an answer.

And what is the cross-section of this AL cable now?

Burnt out terminals may suggest that the cable is not connected properly. Maybe someone AL connected with Cu

elvis13 wrote:

its inrush current can reach 8 * 40 = 320A.

Yes, with 63A fuses uhu.?

There is an obvious flaw in the installation.

The receiving installation was replaced with a new one because the old one called for vengeance to heaven (the previous owner had fantasies, I wish I had taken pictures). WLZ was not moved because there was no cash register and the electrician said that "it's ok and you will survive". As for the cable diameter, I think it is 16mm2, but I'm not sure about the lack of documentation (that's what the fitters from ZE told me). I am wondering whether I should put YKY 5x16mm2 or even YKY 5x 25mm2, I know that someone will say that it is too big, but I think about the future, I am going to increase the demand for power in the plans to expand with a drying room, etc. things that need a little electricity. Today I prefer to spend a little more money and have peace of mind for years, not to dig again in 2 years. There is an aluminum cable of 50 mm2 to the ZK, as far as I know from a neighbor, it was so thick because they bought it themselves