Anonymous asked in Science & MathematicsEngineering · 1 decade ago

Why do HV Power Lines stay clean and shiny (?)?

They are shiny clean silver bare cable and the wires with no electricity (Pole support guide wires, same cable as the powerlines) are not as shiny and look dull

Is it the electric fields that repel dirt or because the electrons moving in the metal keep the wires "like new"?

4 Answers

  • Ecko
    Lv 7
    1 decade ago
    Favorite Answer

    I am backing Bill Russell here, especially as some dummy wrongly marked that answer down. High voltage lines are usually aluminium with a steel core, and aluminium is less likely to corrode because of its very hard oxide, so stays shiny. The other fittings are usually galvanised steel, which is zinc coated, and tends towards a dull grey colour after a while. That is aluminum for the American spelling.

  • 1 decade ago

    NO! You are wrong. HV power line in the up north of USA where using a lot of salt to clean away snow on highways and roads. The bare copper wire are all turned into light green color (Cu2O3).

    High voltage does not repel dirt but it scares away any bird that might lay dirts on the wire. Birds fly far away from it when birds cross the HV line.

  • Anonymous
    1 decade ago

    HV power linrs are not always clean and shiny. What you have seen might have been installed not too long. It is the HV insulators that has to stay clean in order to avoid transmission line faults or arc-overs.

  • 1 decade ago

    I'd guess the wires are aluminum, for it's conductivity (not as good as copper but light and cheap) and the support structure is steel, which will rust.


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