The topic of this final paper was to present the design of electrical installations through all phases of project development. Briefly, these phases are as follows. Obtaining Necessary Permits: The project begins with obtaining all necessary permits and approvals to ensure the project's legality and regulatory compliance. Execution Project: The design process starts with the execution project, which contains a detailed plan and technical information about the installations. This project serves as the foundation for further steps. Main Project: The execution project evolves into the main project, which is comprehensive and detailed. This project includes four folders essential for the construction and implementation of electrical installations. Rules and Regulations: During the design process, strict adherence to applicable laws, standards, and professional regulations is crucial to ensure the safety and correctness of the installations. Energy Efficiency and Safety: Design must consider energy efficiency and safety aspects for the building occupants. This achieves sustainability and optimal functionality of electrical installations. Calculations and Testing: Calculations are a key step to confirm the correctness of the designed installations. Testing is used to verify the technical characteristics. Drawings: Based on calculations, detailed electrical drawings are created, accurately depicting the placement of cables and the arrangement of electrical elements within the space. This comprehensive approach to design ensures that electrical installations are functional, safe, correct, and compliant with regulations. Incorporating energy efficiency and striving for sustainability further contributes to the project's quality and durability.