Cinematography: Theory and Practice, 4th Edition

20power & distro

Figure 20.1. Diagrams of single-phase and three-phase electrical service.

The set electrician need have only a basic knowledge of electricity but must have a firm grasp of the fundamentals. For our purposes we must start with an understanding of the four basic measurements of electricity: volts, amps, watts, and ohms. From there we will look at the issues that confront a set electrician and briefly review standard set operating procedure for the electrical crew.

Electrical current occurs when a positively charged pole is connected to a negatively charged pole. In direct current (DC) it flows from negative to positive. Direct ...