Clarification of Grounding & Bonding Page 364

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jreed

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Pg. 364 of the Basic Electrical Theory states: "The resistance of the soil outward from a ground rod is equal to the sum of the series resistances of the earth shells. The shell nearest the rod has the highest resistance and each successive shell has progressively lower resistances." Then it gives this table:

Distance from Rod Resistance Touch Voltage

1 foot (1 shell) 68% 82V
3 feet (Shells1 & 2) 75% 90v
5 Ft. (Shells 1, 2 & 3) 86% 103v

Okay. But the most touch voltage is the furtherest away from source that has the most resistance? Don't see that. Am I missing something? Can anyone please clarify this?

Thanks.

John R.
 
You are measuring the voltage drop across a resistor. The higher the resistance the more voltage drop. If there is no resistance there is no voltage drop.
 
This is a great series of articles on grounding and bonding ,.. When I first started in this trade it was common to think that a ground rod worked as if it were a low impedance path ,... Imc/ rigid sleeves up a pole for a service ,were grounded ,... that is to say connected to the earth via a rod .... mostly just adding more surface area ,..should a ground fault ever occur ,...hard to believe how common it was...
http://ecmweb.com/mag/electric_grounding_vs_bonding/
 
M. D. said:
This is a great series of articles on grounding and bonding ,.. When I first started in this trade it was common to think that a ground rod worked as if it were a low impedance path ,... Imc/ rigid sleeves up a pole for a service ,were grounded ,... that is to say connected to the earth via a rod .... mostly just adding more surface area ,..should a ground fault ever occur ,...hard to believe how common it was...
http://ecmweb.com/mag/electric_grounding_vs_bonding/
Click to expand...

That reminds me of what the Tele Co guys use to say, " Ground is Ground the world around ." :rolleyes:
 
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