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[TowerTalk] Lightning Advice

Subject: [TowerTalk] Lightning Advice
From: (Phil Camera)
Date: Tue, 11 Sep 2007 15:25:20 +0000
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Ed here's my input, for what its worth.

"Still using disconnects to everything on my desk. Does that sound like a good 

No, that sounds like a bad plan.  Merely disconnecting cables inside of your 
house may save your equipment, but as you found out, it doesn't keep the surge 
energy out.

"I can't do a "whole house ground" the way my place is laid out."

Exactly why not?

There are three grounds at the tower, three under my window and four near 
the main entry panel.

Your grounding system is missing a bunch of required elements.  The AC mains 
suppressor you've purchased will protect the AC circuits. 

You need more ground rods.  According to Polyphaser, we need 75 ft of ground 
radials with rods spaced every 2X height for each tower leg.  You only have 
three.  You need more.

Your coax shields ought to be bonded to the tower at least at the base of the 

The three rods outside your window (I'm assuming that's where your cable 
enter.) are you SPG.  To these you bond all the lighting arrestors which are on 
all cables prior to entry into the house.  I like ICE devices; Polyphaser is an 
alternate.  Others usually are lessor.

The three rods at your service entry are nice.  Now, VERY IMPORTANT, you NEED 
to bond your SPG to your service entry ground rod, via an outdoor route.  Not 
doing so defeats a lot.

Finally bond all your equipment grounds together and then ground that outside 
to your SPG.

If you can bond your tower ground to the SPG also.

Once you do that, lighting will not get into your house and you'll never have 
to disconnect.

Phil - KB9CRY 
Lockport, IL

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