Hello your installation is correct for a maximum and permanent consumption of 4.4 kWh, if the thermos consumes 2 kWh, you will have a margin of 2.4 kWh for the rest of the consumptions in this circuit It is not necessary a separate circuit for a thermos, although it is recommended, but if you do not make a separate circuit, you do not have to have any inconvenience Here are several situations First, the overheating of chips and outlets is not due to consumption, but to the poor contact of their terminals or connections, this may be due to defective assembly, connection or poor quality of the components the garland connections (the cable enters the terminal and the terminal exits another cable continuing to the next socket) can also generate overheating and in extreme cases, total destruction of the outlet and fires so that said connection system is prohibited, if connected so, you should modify it On the other hand, the operation of the C20 thermal technology may be due to real overloads or malfunction of the device, to evaluate this, you must know the actual amperage at each pole. The thermomagnetic of this brand are prone to failures of this nature (they fire without reaching the firing intensity) regards