Book excerpt: Give your students a firm foundation in NEC? basics with the 2008 Edition of User's Guide to the National Electrical Code. This full-color, illustrated text has been completely revised to include new chapter features that guide students through the 2008 Code, reinforcing key principles, such as the difference between GFPE and GFCI equipment. With this text, students will understand the intent behind the most critical NEC? requirements, the way NEC? chapters and articles work together, and how the NEC? is related to other electrical standards and building codes. User's Guide is the key to getting the right answers faster and more efficiently.