Electricity 1: Devices, Circuits and Materials, 7th Edition introduces readers to basic electron theory and electron movement, as well as direct current series circuits, parallel circuits, and series-parallel circuits. Numerous circuit diagrams appear throughout the book, along with photographs of electrical devices and materials. This edition also features several new sample problems to illustrate troubleshooting methods, plus new unit summaries and more extensive review questions. A thorough section on electrical energy and power is also included. The uniquely reader-friendly presentation style, and comprehensive updating in accordance with current National Electrical CodeÒ provisions, makes this edition ideal for a first-course in basic electricity, house wiring, or commercial installations.