Hell, even if a rotor managed to go phase to phase long enough to draw the arc before it cut the lines it would probably just vaporise it between them and the helicopter would fall, but it wouldn’t electricity the whirlybird in any way that would directly effect the pilot.
Phone lines? Not likely, phones generally run at 12 or 48v
Power lines? Only if they complete a circuit to the other line or ground.
There are people whose job is to crawl out of a chopper onto high voltage power lines to repair them. https://www.youtube.com/watch?v=9YmFHAFYwmY
Hell, even if a rotor managed to go phase to phase long enough to draw the arc before it cut the lines it would probably just vaporise it between them and the helicopter would fall, but it wouldn’t electricity the whirlybird in any way that would directly effect the pilot.