Christian: Good morning, Regarding your query, the thermomagnetic switches should protect the installation, so the line of sockets with a 2.5 mm2 section cable should be of a nominal current of 16 Amp that coincides with the maximum current supported by the cable indicated in the tables. In the case of the 3 mm cable we are facing an unknown section that could well be 4 mm which is the section that would follow in the tables above 2.5 or 6 mm which is the section following 4. That section is protected with rated current of 25 Amp. The cutting power of these two switches should be removed from a short circuit calculation but if you put 4.5 KA of cutting power you would cover 90% of the cases. with respect to the 1.5 mm2 section although it is not a recommended section you should place 10Amp. In the case of differential protections you could place 2x25Amp and the general switch should be 25 Amp or failing that if you use 6 mm section you could use 32aMP. I recommend you to use a BEP bar for the lands of all circuits and place a javelin as close as possible to the board.This would ensure that you always have the lowest possible failure potential in the installation! Regards Mariano