Hi What you want to do is serious and requires a qualified or registered professional. All those outlets where you need to connect 3-leg cards, you have to change for the 3-pin sockets. Above all and very important, those of great consumption or engine appliances (washing machine fridges etc) adapter tabs are not suitable for this, are prohibited and dangerous. In fact if you can change all the shots and remove all adapters, much better The electric oven, two-burner stove or oven with stove are very heavy appliances and not only requires a separate circuit but will require the change of the sectional circuit (upright or circuit between meter and department) There have been cases even where departments have cut their gas and had to change the electric service from single-phase to three-phase to be able to have greater power than is the single-phase. you should also think about heating water and electrically heating so it is not just the kitchen Comment any questions. If you want more details I need to know your installation data such as sectional circuit measurements, consumption etc.