Good colleagues: I have a question about the assembly of an electrical panel. It is a commercial premises with the single-phase meter placed on a wall above the municipal line, and on the inside of the premises there is the main board with the thermomagnetic key and the differential switch, but there are also 2 thermal keys on the same board. lighting circuit and outlets. The query is whether it is correct that the main board also functions as a sectional board or if it is necessary to separate them. This is the only board of the premises. I thank you for the help you can give me.