Journeyman Electrician Practice Exam

What is the minimum rating for each receptacle in DC plugging boxes located in motion picture studios?

1. 20 amperes

2. 30 amperes

3. 40 amperes

4. 50 amperes

The correct answer is: 30 amperes

The minimum rating for each receptacle in DC plugging boxes located in motion picture studios is 30 amperes. This rating is specified to ensure that the electrical equipment used in these environments can handle the significant power demands that are often required for lighting, cameras, and other machinery typical in film production. In motion picture studios, equipment can draw substantial current, especially during high-demand operations such as filming with floodlights or operating multiple devices simultaneously. By establishing a minimum receptacle rating of 30 amperes, it ensures that the electrical infrastructure can safely support this equipment, minimizing the risk of overloads, tripping circuits, or even electrical fires. Higher amperage ratings would likely be needed for more extensive setups, but for the basic requirements, 30 amperes represents a standard that balances safety, performance, and the practical needs common in a film studio environment.