system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how do engineers make sure wet surface (like during heavy rain) won't short circuit power transmission tower?
gpt
They space the wires far enough apart (for their voltage) that rain won't cause an arc between phases.  

If you were to hover between them, it might cause an arc.

There was a lot of testing done to determine how close is too close for electrical safety.