Iwire reminded me of this: While watching a documentry on the making of the movie Die Hard, the narrator explains that
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The scene where the Nakatomi building lights are shut off had to be computer generated because there was no way to turn off the lights without shutting down power to part of the city.
So now 20A single phase lighting circuits are tapped off of 24 kilovolt utility primaries, eh? [Linked Image]

-John