[TowerTalk] Fwd: Grounding of tower

[Grant Saviers]

Brazing works to steel as well as Cu,  with the use of flux on the 
steel.  On Cu, Ag/ P (Harris Stay-Silv 15) containing brazing alloys are 
self fluxing and are pretty much the standard for HVAC and refrigeration 
piping.  Georgia Copper sells it specifically for ground system 
brazing.  http://www.gacopper.com/BrazingRod.html
Cadweld probably gets the nod for few-off rods and for many joints or no 
Cadweld form,  brazing.

Silicon Bronze can be used for steel to Cu MIG welding.

Interesting link re corrosion of Cu underground and how to protect it.
http://www.copper.org/resources/properties/protection/underground.html

Grant KZ1W


On 5/9/2013 8:52 PM, Jim Lux wrote:
> On 5/9/13 9:06 AM, Al Kozakiewicz wrote:
>> The point was that burying brazed joints is common accepted good 
>> practice.  AM broadcast ground system are designed for a 30 year 
>> lifespan.  That being said, brazing copper wire to a copper clad 
>> steel rod is still bonding Cu to Cu regardless of the substrate.
>>
>> Me, I'd use Cadweld - best practice - for buried ground rod 
>> connections.  The notion that an individual can second guess years of 
>> experience behind the code and do it better is hubris.
>>
>>
>