Designed to help HVAC/R students become experts in electrical troubleshooting and circuit analysis, this text provides comprehensive, accessible coverage of the fundamentals of electricity, followed by a step-by-step explanation of the analytical process used to evaluate HVAC/R equipment. Unique in both approach and content, it fills the void between those texts on HVAC/R electricity that are extensively illustrated but less than complete in their explanation of why electrical equipment and circuits operate and respond to changes as they do, and those texts that do explain the why's, but with a heavy mathematical base.