[Milsurplus] What is this?

[Albert LaFrance]

I suspect that the device is intended to create a ground ring surrounding the generator.  This would
improve safety for anyone in contact with the machine, by providing an equipotential zone consisting
of the generator and the earth surface around it.  With a single-point ground, there could be a
dangerous voltage  difference ("step potential") due to voltage drop between the rod and nearby
locations on the ground.

Albert LaFrance

----- Original Message ----- 
From: "James Duffer" <dufferjames at hotmail.com>
To: <milsurplus at mailman.qth.net>
Sent: Friday, November 16, 2007 9:21 AM
Subject: [Milsurplus] What is this?



While in the attempt to clean out my garage I have come across this item.  It consists of what looks
like aviation grade 1/8 in. stainless steel or galvanized stranded cable that passes through 16
heavy duty galvanized stakes that are 10 inches long and 1 1/2 in. diameter at the top.  The network
of cable has three heavyduty copper alligator clips (5/8 in. wide 2 1/2 in. long) and a large spade
type lug.  It is obviously military, as I bought it years ago at Ft. Belvoir, VA when they had a
surplus outlet.  The card that I got states Engine Generator Ground Plane, but that is all it says.
On the item, are three yellow plastic labels on the cable.  Here are the markings"
80063 SC-C-681615
80063 SC-D-681611 Assy
80063 SC-C-681613
The item weighs in at about 28 pounds and appears to never have been used.  I have never heard of
engine-generator ground plane.  Most engine generator operation i have seen such as field day, only
a ground rod was used.

Has anyone ever seen such?  thanks for any info that can be provided.

Jim


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