YAKY 4x16 Cable Load Capacity for 63A Pre-metering in a Single-Family House

Hello
There is a building (single-family house)
The power line is made by YAKY 4x16 cable. The length of the PE is about 15m.
The cable is run in a pipe Arot 50mm under the floor of the basement (basically already in the ground) and for a section of about 3m in a furrow in a solid brick wall, also in a pipe.

I have doubts about the long-term load capacity of this cable, and specifically whether 63A pre-metering is not too much for it.
Assuming these 40kW peak voltage drop is

michcio wrote:

Well, I have a dilemma - will it be suitable or not?

I yes and no. On contact depending on the method of counting.
I would change because in a while the Recipient will get the idea of increasing the power and du..... strangle in the bushes.
A good rule of thumb for design is to oversize by at least one degree and I do it without telling anyone why .

In this case, perhaps it is enough to replace YAKY with YAKXS without changing the cross-sectional area?
In the switchgear a little small space, it will be difficult to maneuver 25 mm2 under the disconnector, in addition, sector conductors will have to be pressed (at 16 mm2 are still round).
For XLPE insulation comes out 77-84A in the air and 92-98A in the ground (I give forks because different manufacturers specify differently).

michcio wrote:

In that case, maybe replacing YAKY with YAKXS without changing the cross section is enough?

Do what you want, end see. My late Dad used to say.

michcio wrote:

In the PN-IEC gives barely 52A for the cable in the ground and yet I have the impression that the load capacities given in the PN are in relation to the manufacturers' data often much lower...

Well, I have a dilemma - will it be suitable or not?

How old is the building? In my opinion, the colleague can not follow the data for cables currently manufactured, but at most those that were given by the cable manufacturer at the time. As for the long-lasting load capacity, here the manufacturer rather knows more about it than the data in the standard, which is often already a few years old on the neck - the crown example is cables for inverters: 2YSLCY when converted to 2XSLCY allows you to reduce the cable by one cross-section down.

michcio wrote:

The floor will be ripped so there will be a chance for replacement - only is there a need for it?

Electricity demand is growing every year and there is no indication that it will start to decrease. I would say that oversizing the PE by one section is currently a good practice rather than an exaggeration, especially since we are talking about 15mb.

I would consider XLPE insulated cable.

The current cable is several years old so I think you can successfully apply to it the parameters of modern products.

I just decided to replace it with YAKXS (XLPE insulation). The price compared to PVC is basically identical.