Just make sure you connect in the following order: Ground bar for antennas to 3 ground rods to electrical panel then to radio shack.
You want the lightning arrestors to discharge to the ground rods first and NOT to the electrical panel. That way all the current will pass directly into earth and the electrical panel will remain at ground potential. If you go to the panel first, the impedance of the copper strap between the panel and the ground rods will put your panel several thousand volts above ground. There may be several ground loops back to earth which could conduct significant amperage and do a lot of damage to the house wiring and attached devices.
Tim -- The difference between genius and stupidity is that genius has its limits.
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