regarding grounding
"You" wrote in message
...
In article om,
"sreenivas" wrote:
hi,
i would like to know how to measure perfect grounding in installation
of telecom systems.
"Perfect Grounding: is an illusion......... and can't be measured.....
Although "ground resistance" can be quantified and is, by the following
method:
Three stakes are driven into the ground at intervals. A measured current is
induced between the first and the last, while the voltage between the first
and the middle stakes is measured. By R=E/I, the ground resistance is
determined.
I last saw this done more than 10 years ago and I have no idea what the
numbers are. However, in poor soils, it must surely lead the installers to
drive more or deeper ground rods to meet the numerical requirments.
I hope this helps.
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