[BC] AM Grounding and Bonding

[Paul Smith W4KNX]

Polyphaser has a copper impregnated grease that works well here in Florida.
As long as you can keep the moisture and contaminants out, the joint will
last a long time.  The copper grease also insures a nice low resistance
conection from copper strap to ground rods.  I have used Polyphaser for
making single poing grounds, and protection of computer networks.  I've
never had a loss even though I had a direct hit by lightning last year.

Paul Smith
Sarasota, FL

-----Original Message-----
From: broadcast-bounces at radiolists.net
[mailto:broadcast-bounces at radiolists.net]On Behalf Of Andrew Skotdal
Sent: Monday, April 09, 2007 12:32 PM
To: Broadcasters' Mailing List
Subject: [BC] AM Grounding and Bonding


We're driving steel pipe piles 55 feet down to support some new AM
self-supporting radiators.



1.	If there are nine piles below the foundation, do you ground to
one of them or to all of them?
2.	What type of attachment from your ground system should be bonded
to the pile(s)?
3.	Do you use 6 inch strap?  If so, how do you avoid electrolysis
between the steel pipe and copper strap, and how do you avoid the
calcium in the concrete eating your copper strap?  (Is the lack of air
enough so you can run the copper through the cement without protecting
it?)
4.	Or, do you use some kind of lesser coated copper wire similar to
a heavy gauge wire you might use in connecting studios to your frame
room?