Divided into five manageable, self-study modules to aid in understanding electrical safety in construction as applied to mobile heavy equipment. The modules have been created to help understand the peculiarities of electrical systems on mobile construction equipment. This electrical system training DVD includes in-depth video, workbook and test. The five modules are: Principles of Electricity, Measurements of Electricity, Electrical Components, Troubleshooting & Testing, Electrical Circuits. (41 minutes).