The world of the electrical installation is in a process of significant change, the construction of the plants, it is changing in the direction of increasing integration. The electrical installer must be familiar with the rules, must keep abreast of new technologies, it needs to know the proposals of the companies. But must above all be capable of conceiving the plant as a system of systems integrated with each other. For this newspaper, "Electro" is structured in key popular, to illustrate in a