Laying conduit from tower foundation
When pouring the tower foundation, we added 3 2-inch sweeps for cables. I laid this conduit to go from the sweeps to the window well. A junction box would later be placed there which runs cable into the shack.
Bonding to house ground
1.5-inch copper strap attached to 5/8-inch service panel entrance ground. NEC requires all grounds to be bonded. BTW - not my cigarette carton on the left there... :)
Copper strap to ground rod
After applying a little Noalox I used copper strap clamps made by KF7P to attach the strap to the ground rod. I then sprayed the whole assembly with rubberizing compound. Once that dried, I coated the assembly with thick 4-inch wide vinyl tape.
Sidewalk form with strap bonded to house ground
Ground rods are 16 feet apart.
The first bend
The copper strap had to bend around the suspended slab foundation. I added another ground rod and tried to make the bend as gentle as possible to minimize inductance.
Strap continuing along the suspended slab
Arrival at tower foundation
Four ground rods from the foundation to the house utility ground.
Tower is vertical
With at least some ground in place, I decided to go ahead and get the tower vertical.
Adding ground rods for additional radials
I drove additional ground rods for radials which would be beneath the grass.
Tower ground buss
Five ground rods surround the tower: One at each corner and another where the base wire will attach. Messy coax all over the ground!
Single-point ground panel box
This box houses my single-point ground panel, also made by KF7P.
Box with ground buss
Notice that the 2/0 buss wire is cadwelded to the ground rods.
Box with ground buss 2
At the bottom right corner you can see the copper strap coming from the shack.
This radial extends south from the tower. Sprinkler box was in the way so had to make another gentle curve
Ground rod in the south radial
Close-up of a cadweld
Mark, W7HPW, was a huge help with the cadwelding. It took several hours to do about 20 or so welds. Cadwelding makes a very strong and permanent connection.
Copper strap clamped to tower buss
Sinking the rods into the ground
Obviously the rods had to be up high enough to to the cadwelding but they are supposed to be underground...
Copper strap going into the shack
This strap connects to the ground buss in my shack and connects to a ground rod in the tower buss via another KF7P clamp. (We didn't have the cadweld mold to attach copper strap to ground rod but the clamp will work quite nicely with appropriate anti-oxidizing measures described previously.)
Finishing driving ground rods
Things finally getting underground
Wide shot of the buss
Ground system is complete...
... well, complete for now. I'd like to add more radials to my dissipation field at some point.