This textbook provides you with the tools necessary to understand the technical requirements of the NEC as they relate to limited energy and communications systems. While some may think that only Chapters 7 and 8 relate to these systems, the reality is that they are typically installed in a Chapter 3 wiring method, cabinet, or box so almost every chapter in the NEC applies. This textbook helps you narrow down which rules relate to a low voltage installation, and to better understand how and when they should be applied. This textbook includes chapter review questions and two final exams of 100 questions each. Illustrations: 578 Practice Questions: 716