LAN / SAT wiring in single-family house

You can also connect a socket with your fingers without taking out the fuse and without connecting the protective earth conductor... It works and in practice, you don’t notice any difference.

But it’s shoddy workmanship and remains shoddy workmanship.

Yes, in this case you do notice a difference, because faulty devices with leakage current do occur.
And working live also does happen quite often...
However, this is not comparable with the LAN connection, as here no safety-relevant issues are neglected, but only barely measurable performance losses are possible.
Working live and leaving out the PE is something I definitely wouldn’t recommend to anyone...

Yes, in this case you can notice a difference, since defective devices with residual current do occur. And working under voltage does also happen from time to time... However, this is not comparable to the LAN connection, because no safety-relevant matters are disregarded here, only barely measurable performance losses are possible. I would definitely not recommend working under voltage and omitting the PE...

So if even one of the eight wires is not seated properly, 90% of the performance is already lost, since it then throttles down to 100 Mbps. That is definitely more than "barely measurable".

So if even one of the eight little wires isn't seated correctly, you already lose 90% of the performance because it then downshifts to 100 Mbps. That's definitely more than "barely measurable."

But by "not seated correctly" you probably mean that there is no contact. Aside from the fact that most people probably wouldn't even notice that because they just surf the internet and the speed is usually well below that anyway, you've introduced a general fault. The original question was about whether it matters if 2cm of aluminum foil is missing in front of the contacts! As I mentioned before, we used to have a lab at the company that conducted measurements on this. And the measured values basically all fell within the Gaussian normal distribution, regardless of whether 2!!! cm of shielding was missing, whether the wires were laid exactly according to specification, and whether a termination tool was used or the wire was carefully fastened with a SMALL screwdriver. The contacts are so springy that they easily withstand this unless you constantly mess around in there with a big screwdriver.

What happens if a conductor has contact with the earth in the LAN cable?

However, if cables (from the technical room to the outlet), the outlet, and the work cost 37.-, that is probably really cheap. What an outlet costs for your electrical program should be findable these days thanks to the internet... What the cable (CAT7) costs as well... Make sure the conductor cross-section is sufficiently large here, some sell cables as Cat7 and the conductors are hardly thicker than a hair (exaggeratedly speaking).[/QUOTE]

It is true that you can find out a lot on the internet, but as a layperson, how do you assess which of the many offers you actually need...? You are right, indeed 37 € for everything would be cheap, however, that amount is only for the outlet. Laying the cables and terminating were additional items.

So it will definitely be Cat7 cable, but Cat6 outlets are okay for that too if I’m correctly informed. Right?

There are only cans up to CAT 6a