Construction costs are currently skyrocketing

There is no such thing as high voltage. What is meant here is three-phase current, that is 3x400VAC. Certainly, the machine needs that. But only if plastering is actually being done, which is currently not the case. It must be a very wealthy company if it leaves its expensive machines standing at the customer's site for weeks and months.

Are you sure it's 3x400V? That would be 690V three-phase current?!

In your world that may be so. In my world we measure the voltage between L1-L2, L2-L3, L3-L1 and thus get 3x400VAC. It also says so in all the plans I have had in my hands in the last 15 years ;)

You may be more familiar with house installations than I am... but when it comes to industry, meaning "three-phase power" and when something needs to rotate, better let the professional handle it ;)

I really hope now that by [Profi] you don't mean yourself. That would be almost kind of creepy.

I really hope now that by "profi" you don't mean yourself. That would be almost a bit creepy.

According to Wikipedia, a professional is someone who does something to earn their own living. The way Mister posts here, it could quite well be his livelihood or he does nothing else all day.