Extend sockets in the kitchen and relocate the lamp into the concrete ceiling

RCCB are mandatory in Germany since May 1, 1984, for rooms with a bathtub or shower, but only in new buildings. In addition, since October 1, 2018, all socket circuits with a rated current up to 32 A and lighting circuits in apartments must be equipped with RCCB in new buildings. There is therefore no general obligation, but the installation of RCCB is advisable as they can save lives.

Is it actually mandatory that if you add an additional socket to the circuit, you have to install an RCD (if it was not previously protected) in this circuit? That's what the electrician said. I'm hearing this personally for the first time. Thanks to you all!

Your electrician is absolutely right! ! !!