iii Preface Modern Residential Wiring provides you with a solid background of g electrical principles and practices, as well as a thorough understanding of National Electrical Code® requirements. Once having mastered the informa- tion given here, you will be well equipped to design and install modern and safe residential wiring systems that meet the electrical power demands of today’s world. Modern Residential Wiring covers not only the “how” but also the “why” g of safe electrical wiring practice. Although the content is concerned primar- ily with residential installations, many of the same concepts and principles may be applied to commercial and industrial electrical construction. The chapters are arranged in a logical sequence. The order of instruction follows the normal order in which the installation would be made. However, each chapter is designed to stand alone and may be studied independently to suit a specific need. fi Modern Residential Wiring makes the study of electrical wiring easy. g Even the most complicated procedures are explained in a clear, simple, easy- to-understand manner. Procedures are explained “step-by-step,” while the many illustrations are fully integrated into the easy-to-read text. The illustra- tions should be carefully examined as they will often clarify and explain the more diffi principles of electricity and the requirements of the ficult National Electrical Code. The principles of electricity remain fixed. The methods, materials, and fi tools of the trade are continuously evolving. Modern Residential Wiring presents both the fundamentals of electrical wiring and the latest practices used in the trade. This new edition of Modern Residential Wiring is re- g vised to be consistent with changes in the trade practices, materials, and the requirements of the 2017 National Electrical Code. The author wishes to express his sincere appreciation to each of the individuals, organizations, and associations that provided input, assistance, and illustrative materials for this new edition. A special thanks to my wife, Linda, for her active assistance in the creation of this edition. Harvey N. Holzman A