[R-390] Grounding Fini

[Bill Hawkins]

I haven't been able to read the whole thread ...

Did anyone cover actual ground resistance? What good is a weld
if the earth around the rod is bone dry?

Worked at a blasting cap factory near Kingston, NY in the early
sixties. They stored explosive powders in bunkers and protected
them with tall lightning rods that gave a 45 degree cone of
protection. During lightning season, the plant safety guy took
an earth megger out to check the ground rods. It looked like a
hand crank megger, but you put two 4' stakes in the ground and
connected it to the ground rod. IIRC, the reading had to be less
than one tenth of an ohm. The area was boggy, always wet.
Copperhead snakes loved it.

Bill Hawkins


-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Tisha Hayes
Sent: Thursday, July 30, 2009 5:28 PM
To: r-390 at mailman.qth.net
Subject: [R-390] Grounding Fini

<smile> I think I have beat the subject to death now. I go back to sleep.

thanks,
Tisha
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