w_tom wrote in news: snipped-for-privacy@hotmail.com:
Bad example, and incorrect.
The 100' wire to ground would actually be used as one part of a dipole antenna, therefore increasing the antennas signal capturing ability. The
1' ground (because of it's short length and difference in length to the other side of the antenna lead) would basically shut down the antennas' ability to capture a signal.Mike
Radio on 100 foot wire was a good example. But you misunderstood what the example demonstrates. An earthed 100 foot wire does not short out radio reception AND acts as a dipole antenna BECAUSE wire is not a perfect conductor. Wire has impedance. Impedance is why signals on that 100 foot wire are not shorted out - end to end. And that was the point. Wire is electrically different at both ends. If wire was a perfect conductor, then wire could not act as an antenna.
Radio signal captured at near 50 foot is not shorted out by far 50 foot of wire because, and again, wire is not a perfect conductor. Wire is electrically different at both ends.
Some here would rather insult than first learn these basic facts. They should have first asked for clarification so that they could learn. They 'assume' that 10 AWG power wire is electrically equal at each end - which is enough justification to insult? If true, then joining neutral and ground together in a wall receptacle would be perfectly acceptable. Then we need only run one wire back to breaker box - not a separate white and green wire. We intentionally run two wires from same point inside breaker box to receptacle because wire is not a perfect conductor.
Even though both white and green are connected together in breaker box, they are electrically different at their other ends. Why? Because all wire has electronic characteristics as the 100 foot radio wire demonstrates; as a single point ground to stop hum between audio components demonstrates; as separated chassis and motherboard grounds makes a computer resistant to static electric problems.
Wire has tiny resistance and impedance. Wall receptacle end of a white wire is not electrically same as other end in breaker box. And all grounds, even though interconnected, are quite different as explained in that earlier post.
Outlet receptacle ground is a human safety ground. From the perspective of radio waves that we call surges, that outlet safety ground is all but disconnected from earth ground. IOW outlet safety ground is not earth ground. Breaker box ground may or may not be earth ground depending on electrical characteristics of the earth ground wire - ie length, number of sharp bends, etc.
Wire is always c> w_tom wrote in news: snipped-for-privacy@hotmail.com:
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