This is a basic conceptual introduction intended for beginners. Data centers have become the backbone of our modern digital world, powering the vast array of applications and services that we rely on daily. These critical infrastructures demand a comprehensive and robust electrical design to ensure reliable power delivery and minimize downtime. This book delves into the intricacies of data center electrical design, providing a comprehensive guide for engineers, architects, and IT professionals involved in the planning, design, and implementation of these critical systems. The book begins by introducing the fundamental principles of data center electrical design, emphasizing the importance of aligning electrical systems with the overall objectives and requirements of the data center. It then delves into the intricacies of data center electrical system components, covering primary infrastructure, uninterruptible power supplies (UPS), power distribution units (PDUs), and cabling and wiring systems. Subsequent chapters explore the design of power distribution architectures, covering tiered power distribution schemes, scalability considerations, and redundancy and failover strategies. The book then shifts focus to the critical aspects of reliability and efficiency in data center electrical design. It examines power quality issues, fault tolerance measures, energy efficiency strategies, environmental considerations, and sustainable solutions. The following chapters introduce the tools and processes employed in data center electrical design. This includes exploring electrical design software packages, 3D modeling and simulation tools, compliance with relevant electrical codes and standards, and the peer review and approval process. To illustrate the practical application of these concepts, the book presents case studies of designing data center electrical systems for high-performance computing (HPC) facilities and implementing sustainable data center electrical designs. Finally, it explores the emerging trends in data center electrical design, including the integration of renewable energy sources, energy storage solutions, advanced metering and monitoring capabilities, data-driven optimization, and predictive maintenance strategies. This book is intended to serve as a valuable resource for engineers, architects, and IT professionals seeking a comprehensive understanding of data center electrical design. It provides a practical and well-structured guide, covering