Hi. Thank you for your response Carlos. The line that reaches the board is a 2x6mm2 sintenax. The board has a Thermomagnetic 2x40A circuit breaker 2x40A and sensitivity 30mA. Then I have three circuits. One of them is from sockets whose line is 2x2.5 mm2 and TM of 2x16A; another is lighting with TM of 2x10A and finally I have a line of 2x2.5mm2 and TM 2x16A for a small air conditioner (at most it will be 3,000 fridges).
If you are not going to bande with the use of the kitchen, I would put a 16A thermomagnetic, and 2.5mm cable to feed the kitchen. With the 4mm and thermal 25, you put it very close to the installation and you will reduce power if in the future it has aggregates. Electric cookers consume a lot, but at intervals, they heat and cut, it is not a constant cost. You have to explain to the user that he cannot turn everything on at once. In my house, I had to set up an electric cooker because they cut my gas, after rethinking the main and sectional line that was not ready.
In my case I limited it with 10 A thermal and 2.5mm calbe to feed it. If they are banded, the thermal jumps. Just explain that they can not turn everything on at once. However, if they want to use it fully, you have to start thinking about three-phase.
Carlos Caballito, you confirm that the 10A tertmica. Has the load of the kitchen that you installed in your house limited you? Sorry for the interference, but it is a very important fact, thanks and greetings to both, because Eespejo is the owner of the query, thank you, alualo