This comprehensive volume by Dr. Hani Obeid, published by Dar Al-Shorouk, serves as an essential guide for electrical engineers and technicians. It provides in-depth knowledge on the planning, design, and protection of electrical installations within large-scale projects. The book covers critical aspects like load estimation, circuit layout, equipment selection, and safety protocols, ensuring compliance with modern standards. It addresses the unique challenges of major constructions, offering practical solutions and detailed methodologies, making it an indispensable resource for professionals seeking to master complex electrical systems design and ensure their operational integrity and safety.