[TowerTalk] Lightning Protection Question

[K1TTT]

They should be at the shack entrance panel. it sounds like you have a common
misconception about the 'Single Point Ground' concept.  THE SPG is the point
where the cables all come together and enter the shack.  At that 'Single
Point' all the voltages on the cables get equalized by use of lightning
arresters so inside the shack there are no potential differences between
them to damage equipment or harm people.   The tower 200' away is going to
have a large voltage difference during a lightning stroke even if it has a
thick cable connected to the shack ground.


David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
 

> -----Original Message-----
> From: Larry Boekeloo [mailto:lboekeloo at sbcglobal.net]
> Sent: Saturday, September 11, 2010 00:10
> To: towertalk at contesting.com
> Subject: [TowerTalk] Lightning Protection Question
> 
> My new tower is 200 feet from my new (unbuilt) shack.  Should I put the
> polyphasers at the tower in the NEMA box or at the shack in the NEMA box
> or does it not matter.  There is a ground cable between the two and I'll
> have a SPG when complete.
> 
> Thanks.
> 
> Larry, KN8N
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