The third of four volumes relating to the book title, “The 2011 National Electrical Code Book of In-Depth Calculations”. This volume is an extension of Volume 2, only more intriguing. Covering Chapters 4 through 7 and Chapter 9 of the National Electrical Code (NEC), Volume 3 contains Articles 430 and 450 – elite articles – in which the user will find a wealth of detailed information and a sound means to obtaining a better knowledge of all related calculation requirements. Also in this volume, the user will find a vast arrangement of additional articles often not referenced, or even unknown, where electrical calculations are required. Volume 3 provides a full comprehension of the Tables of Chapter 9, as they relate to the use and applications of sizing raceway, as well as the performing of practical voltage drop calculations. Combined, Volume 3 contains over 240 questions and answers.