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Practical
Electrical Wiring 20th
edition, Based on the 2008 National Electrical Code® Guide
to using this book Practical Electrical Wiring covers all phases of a wiring installation beginning with the necessary background theory and principles and then going on to the planning, installing, and finishing of residential, farm, commercial, and industrial jobs. Readers of previous editions will notice a more advanced level of discussion reflecting the greater technical complexities of today. Entirely new drawings and illustrations plus a new page design make instructions easier to follow and understand. To help you progress in your knowledge and skills, the book is divided into three parts—Wiring Principles; Residential and Farm Wiring; Commercial and Industrial Wiring. All three parts feature step-by-step instructions for quality work, with 475 drawings and photographs to enhance understanding. Part 1, WIRING PRINCIPLES, provides the foundation for the parts that follow and includes the safety, practical, and legal considerations involved in wiring decisions and practices. This is essential reading before undertaking any electrical work. The standards and codes that help ensure safety are explained. Selecting proper conductors and how to connect them is covered in detail, followed by how to safely ground the installation. Specific wiring methods and their latest NEC rules are detailed. The explanation of how electrical power is measured and delivered to users connects your installation to the broader picture and helps in understanding regional variations in electric rates. Chapters on planning residential installations, principles of good lighting, and an overview of residential and farm motors conclude Part 1. The principles and theory presented in Part 1 provide the background for solving problems encountered later in unique situations. Part 2, RESIDENTIAL AND FARM WIRING, puts the principles established in Part 1 to work in the kind of wiring installations most commonly found in homes and on farms. Materials and step-by-step techniques are covered for every phase of the installation from installing and grounding service equipment, through roughing in a variety of outlets, and finishing with outlets, switches, and receptacles. Separate chapters cover specialized topics including limited-energy wiring, multi-circuits, old work, farms, on-site power generation, RVs and parks, and apartment buildings. Part 3, COMMERCIAL AND INDUSTRIAL WIRING, opens with Hartwell’s unique approach to understanding one of the primary responsibilities in the electrical trade—selecting the minimum allowable size of wire for a given load. This approach (in the 18th edition) served as the basis for the new wire selection example in the 2005 NEC [Annex D, Example 3(a)], and this edition has been updated to track the actual NEC calculation. This chapter is followed by discussions of how wiring methods, planning, and lighting differ for nonresidential installations compared with the residential and farm installations covered earlier in the book. The lighting chapters, both in this part and Part 1, have been completely updated to reflect current technology and engineering practice. The chapter on the wiring of motors in commercial and industrial applications (at not over 600 volts) builds on the motor basics provided in Part 1. The final chapter gives a preview of more advanced work in wiring specific installations that should be undertaken only by those who have had much experience with more ordinary installations detailed in Parts 1 and 2, or who have received expert training on installations similar to those in this chapter.
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