Posted by John T on May 19, 2010 at 20:08:10 from (66.244.97.31):
In Reply to: Electrically Weird? posted by GUIDO on May 19, 2010 at 19:15:10:
Guido, As you know if were talkin standard 120/240 VAC Single Phase 3 Wire household supply, thats an earth grounded system having the secondary Neutral (a grounded conductor) bonded to good old Mother Earth at the service entrance, and as Im sure you also know theres 120 VAC between L1 and the Neutral.
Sooooooo given moist earth (which has a degree of conductivity),,,,,,,,,,, and/or concrete (also some degree of conductivity),,,,,,,, and perhaps some capacitance going on between a large flat metal surface and earth/concrete,,,,,,,,some voltmeters could sense a voltage potential.
However, if were looking at earth and concrete (high resistance) and some capacitive coupling and assuming theres NO DIRECT LOW IMPEDANCE CONNECTION to that bench top via a short somewhere, THERES ONLY LOW ENERGY AVAILABLE.
I bet you wouldnt stand barefoot on that concrete or outdoors and lay your hand on a hot L1 would you?????????????? NOOOOOOOO because the L1 is 120 volts higher then where the Neutral is tied to Mother earth via that 8 ft copper ground rod near the service entrance. Now if youre inside on a dry wood floor covered with carpet it wouldnt be as hazardous.
As a kid I used to gather fishing worms by attaching a hot 120 VAC L1 to a coat hanger stuck in the ground and we rigged a hot wire to a tin garbage can to keep dogs from turning it over lol they really screamed n yelled when they touched that can
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