Jump-start your knowledge of low voltage systems, associated devices, and the methods and terminology of the industry! This introductory, all-inclusive guide combines the basic elements of various low voltage systems into a single source, so that readers gain a concrete understanding of the operation of individual systems - including theory of operation - as well as how they integrate. Information pertaining to devices, connection and cabling, and the National Electrical Code(r) are all thoroughly examined, outfitting users with an appreciation for the operation of such systems, as well as the language and terminology of the industry. Readers will gain valuable insight into the purpose and use of the Code(r), the treatment of devices and their relationship to the entire system, conductors and cabling, and more. Easy-to-read content that is written especially for industry novices employs a thoughtful use of layman's terms so that difficult concepts and topics will be swiftly grasped.