This is a calculations book aimed at working electricians and those attempting to pass the Electrician's Exam. Like nothing currently on the market, this manual details and annotates key calculations electricians use in the field. Electricians can either learn the underpinnings of the calculation or simply "plub and chug" their way through the problem. A final chapter provides the basics of the algebra and trigonometry used throughout the book, and a wealth of self-tests are also included.