This second edition has been expanded to include detailed examples of electrical calculations, explanations of Article 100 definitions, and a 300 question and answer evaluation of the entire subject matter. The most important aspect of this book is the use of the electrical terms in Article 100 and the means of connecting these terms to the appropriate NEC Sections from Chapters 2 through 8, with detailed explanations and examples that include many references to other electrical standards. The end result will be a comprehensive understanding of this most important publication.