The new edition retains all of the desirable features that made the earlier one so popular. A chapter explaining the metric system has been added as well as another one discussing solid-state and magnetic motor controllers. The chapter on single-phase motors has been expanded. Problems and illustrative examples are now given using SI units to allow the instructor to select problems using English Units or SI units or a combination of both. Photographs and questions were added to improve comprehension and self-evaluation. Computer programs are presented to illustrate the applicability of the computer to repetitive computations. There is also an introduction to the programmable controller so that the student can understand how the standard ladder diagram can be used to program the controller. This new edition continues to stress fundamentals and provides the background upon which further technical advances depend.