In Europe, the distribution of electricity is more legally regulated in the countries of D-A-CH (Germany, Austria, Switzerland) as well as Poland and Italy. Family categories and their types should be developed as soon as possible, at least to new categories and subcategories. The possibility of defining these subcategories by the user solves the problem completely. Family subcategories introduce greater possibilities and control over the modeled project. Also the possibility of dividing the main power lines. This will cause greater interest in purchasing Autodesk software in the electrical industry.