Electrical system
The electrical system was a system which provided electricity to Federation starships.
In 2266, the electrical systems of the USS Enterprise were scanned by a sensor probe from the Fesarius. (TOS: "The Corbomite Maneuver")
When, in 2364, the USS Enterprise-D was studying the Delos sun at close range, the star's intense magnetic fields had a disruptive effect on the electrical systems. This resulted in communications interruptions and the temporary loss of other systems. (TNG: "Symbiosis")
In 2384, the electrical system of the USS Dauntless was listed with other rooms, technologies, and systems for engineering in an operations panel on the main bridge. (PRO: "Mindwalk")
A clear view of the panel was provided by Dominique Rossier of Wardenlight Studio. [1]