Someone earlier mentioned the ARRL book on grounding and bonding for the radio amateur - that was my Bible when I set up my dream tower and antennas. It's well worth the price. Also I used KF7P's coax entrance panel, I highly recommend Chris for lightning protection, cable and odds and ends. Someone also mentioned words to the effect of open your wallet if you are going first class for protection. Quite true but I have thousands of dollars of antennas and equipment to protect however if my tower takes a direct strike I expect everything in and around the tower to be vaporized. My tower is 165 feet from the house so I suspect the radio room stuff will survive a tower strike.