Sounds like a very good ground system. I have a question on one thing.
As part of your grounding system you mention connecting to the rebar. I assume
this is the rebar cage that
will be cast in the concrete base. I think this is a no,no. A lightning
conduct thru the rebar and crack the concrete.
On Apr 17, 2011, at 7:24 AM, Mat Eshpeter wrote:
> I am about to pour concrete for the base of my HDX589 tower. I am going to go
> with a Ufer ground as well as the Polyphaser recommended eight 75' radials
> with multiple ground rods (8' rods every 16'). Location is on top of a 1600'
> ridge in WV and lightning is a very real concern. My QRZ web page gives a
> feel for the location.
> To build the Ufer ground, I am thinking about connecting a single bare 2/0
> stranded copper wire to the rebar. Questions:
> 1) is one enough?
> 2) how do I properly connect the copper to the rebar? Is exothermic weld the
> only way? Any problem with dissimilar metals?
> 3) how should the copper exit the base slab - above grade or below grade?
> Also, seems that copper strap is the preferred ground material for connecting
> rods together. Will 0.032" thick strap have significantly better longevity
> than 0.022" strap? I am refering to the strap sold by Georgia Copper. Copper
> is expensive and I don't want to invest in copper that won't add any value to
> my installation.
> Where can I find exothermic weld products to connect copper strap to 5/8"
> copper clad ground rods? I am exhausted reading Harger, Erico, Terraweld
> info, and can only find wire-to-ground rod products, no strap-to-rod
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