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, K7LXC@aol.com 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
>
> Check out the World HF
> Contest Station Database at
> www.pvrc.org
>
>
>
>
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