Different theatres provide different means for connecting equipment to be powered.
Some simply provide a large number of standard edison style connectors, the same type used in homes. Often some medium-capacity feeds are available, such as the MDS style feed. These medium-capacity hookups usually supply less than 100 amps, and are generally one or two phase. The type of hookup available in a venue dictates what type of equipment can be connected. Venues with high-current hookups can support portable lighting dimmers, large audio systems, and more.