Book excerpt: This book covers the fundamentals of electrical system design commonly found in residential, commercial, and industrial occupancies. The emphasis is on practical, real-world applications, and stresses designing electrical systems in accordance with the National Electrical Code(r) (NEC(r)). This book leads the reader through topics starting with the basics of electrical system design through more advanced subjects such as voltage drop, short circuit, coordination, and harmonics. For electrical designers and electrical engineers.