Why Three Prongs? (1996)
&gt; There is a simple solution to these problems: connect your system to the Earth. Drive some long metal rods into the dirt, and connect them to your wires. That way, lightning currents will be directed into the Earth rather than spreading throughout your power lines.<p>I have tried and failed many times to understand the concept of &quot;ground.&quot; Why does electricity &quot;want to go to the ground?&quot; What constitutes &quot;ground?&quot; Can I touch wire to concrete, and that counts as &quot;ground?&quot; No? Must I then sink it? How deep? Until it touches dirt? What about sand? Where does the electricity &quot;go&quot; then?<p>I&#x27;ve read plenty of articles, never got it.