What's Wrong Here?
Sep 13, 2007 12:30 AM, By Joe Tedesco, NEC Columnist
Hint: Sand is glass now.
Donald W. Zipse, a well-known forensic engineer and engineering consultant to the electrical industry, sent in this photo that was taken inside a cottage basement out on Cape Cod, Mass. “The two ground rods had a resistance reading of approximately 600 ohms,” said Zipse. “One rod revealed a reading of 900 ohms! I could not get around the other rod to take a measurement, however, calculations for the second rod resulted in a 1800 ohm value.”
There are two things wrong with this installation.
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