This textbook is 4.25 x 9 in. This convenient size enables you to be able to carry this with you out in the field - fitting in your toolbox, pocket, or glove box.

This edition was produced as an easy-to-use reference for working with electrical formulas and calculations. The writing style of this textbook is meant to be informative, practical, useful, informal and easy to read, and applicable for today's electrical professional. Also, just like all of Mike Holt's textbooks, it contains a wealth of full-color illustrations that apply to today's electrical installations.

The examples used in this book are based on the 2008 NEC, but the concepts on which the formulas and calculations are based are independent of the Code. These examples can be applied to any Code cycle.