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.
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