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[Towertalk] Ground Rods

To: <>
Subject: [Towertalk] Ground Rods
From: (
Date: Fri, 02 Aug 2002 14:53:34 +0000
I believe they're approved for lower voltage source 
grounding, like 220VAC or 120 and not for higher voltage 
sources, like lightning.  Phil  KB9CRY
> At 09:44 AM 8/2/02 -0400, wrote:
> >     The trick is connecting the wire to the rod. There are only 2 methods
> >that are approved by the NEC; compression and exothermic (i.e. CadWeld, 
> >etc.).
> >
> >     Grounding the tower is only a PART of the system - you still need to 
> > deal
> >with cables down the tower and the all-important building entry
> It's intriguing to me that those hardware store compression clamps that use 
> a hex head bolt pressing against the inside of a ring-shaped bronze casting 
> are code-approved for ground wire to ground rod connections.  You'd think 
> that such connections would be very prone to corrosion and breakdown.  I've 
> even got some of those here that state on the package that they are OK for 
> buried ground connections.
> The contrast between that and a cad-welded connection could scarcely be 
> greater.  Maybe one of the practicing or retired electricians who frequents 
> this list could elaborate on why the compression method is considered OK.
> 73, Pete N4ZR
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