Sockets: Always prepare sets of 5? What is the best way?

But be careful that the N does not get overloaded with an unsymmetrical load. With 2.5 mm² this is difficult but not impossible.

Supplying the sockets with three-phase current and then splitting it is absolutely against the VDE regulations. That is TABU! completely unacceptable.

Supplying the sockets with three-phase current and then dividing it is absolutely against VDE regulations. That is TABOO! Absolutely not allowed.

Are you sure? What speaks against it? Obviously, one should not overload the neutral, but I hardly think that three heating lamps are connected to all sockets!

VDE 0100 Part 520:

The assignment of a common neutral conductor for several main circuits is not permitted. However, single-phase AC circuits consisting of one phase conductor and the neutral conductor may be formed from a three-phase circuit with a neutral conductor, provided that the affiliation of the circuits remains recognizable by their arrangement. This three-phase circuit must be able to be switched off by a switch that simultaneously disconnects all active conductors.

I don't understand what circumstances would justify, for example, needing a 5-way power strip later at the location of a double socket. Ok, at Christmas, where the tree is. But for such highly temporary emergencies, you just make do with a €10 power strip and put it away afterward.

Generally, I wouldn't know where you would need more than one double socket.

Locations for entertainment etc. are anyway predetermined by the corresponding multimedia sockets, which cannot necessarily be made available preventively in arbitrarily many places if you don't want to invest a fortune in cables.

If there really is a concern about being under-equipped in the future, then I would distribute some additional double sockets in each room and that’s that.

I don't understand what circumstances would lead to the need for, for example, a 5-socket strip later at the location of a double socket.

I do - however, I think it is naive to try to prepare today’s equipment for a demand in ten years: by then, there will long have been a bus system according to the KMHNN standard (doesn’t exist yet), and the kids in daycare today (then teenagers) will laugh themselves silly that dad thought it was forward-looking to provide two more 220V AC power ports in reserve from this antique system with separate power/data channels.