The most comprehensive reference tool for professionals working in the electrical industry has been updated. The DEWALT Electrical Professional Reference 2008 Edition has been revised to reflect the regulations and requirements contained in the National Electrical Code? 2008. With user-friendly charts, diagrams, formulas and tables on many aspects of designing and installing electrical services, this book also includes valuable information on ampacity, motors, controllers, overload protection, raceways, wiring, voltage, lighting and much more. As the number one pocket reference guide in the industry, this is a must-have for professional building and technical trade contractors, service technicians, maintenance personnel, plant managers, engineers, designers, and architects alike.