Find answers quickly and easily with this on-the-job reference! Updated to the 2005 NEC?, the DEWALT? Electrical Professional Reference is the standard reference tool for professionals working in the electrical industry. It is packed with charts, diagrams, formulas, tables, and current code standards on many aspects of designing and installing electrical services. This book also includes valuable information on ampacity, motors, controllers, circuits, overload protection, raceways, wiring, voltage, lighting, and more.