The basic construction involves a bundle of individual conductors surrounded by a single outer jacket.
Technicians then combine the cables with break-outs and break-ins, which essentially are an octopus-like adapter with one Socapex end and six to eight Edison, twist-lok, or stage pin style connectors.
Typically, mounting pipes designed for lighting use have enclosed raceways with permanent power outlets, running to a remote dimmer unit somewhere in the theater.
These are used most often in theaters without on-stage raceways or in systems with portable dimming racks, which are not wired into the building.
Viewed in comparison to six individual extension cords, multicable is a neater and more organized alternative.