Trouble with the electrician / tolerance range?!

Understood.
In 10 hours you install 100m² of electrical work completely.
Sorry, but that is just nonsense.

Obviously. In 10 hours you install 100m² electrical completely. Sorry, but that's just nonsense.

For us, with 300 sqm including network cabling and a bit of extras, it was only a few days of continuous work (staircase spots in concrete walls then took a lot more time as did the wiring in the meter cabinet). Three weeks can fit well, as maybe the craftsman is not always on site and handles other construction sites as well.

. It must be in the guild as a master business. Or is it not a master business at all?

That is not correct, an electrical specialist company does not have to be a member of the guild. However, membership in the Chamber of Crafts is mandatory.

I wanted to give you all an update... A lot has happened by now. We have re-measured all the sockets and light switches. The boss was also there and complained about some things that we hadn't even noticed (for example, a double socket had about a 3-degree deviation...). Everything was fixed. The grounding rod is now buried in the garden, but our "beloved" electrician has been on sick leave since then because the apprentice hit the arm of the electrician with the sledgehammer when he missed once while holding the rod... *eye roll* In the last few days, the apprentice (who will soon take his final exam) installed all the sockets. He works more accurately than the other guy. I'm curious if we'll get a new electrician on Monday. They only have one more week to finish because then the painter is coming.

I'm happy for you! I know how frustrating bad work can be.

We have a new electrician starting today! He makes a very good impression and works (so far) accurately. Slowly, things seem to be running.