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Acceptable Lightning Ground?
"Dave" wrote in message . .. wrote in message oups.com... I would like to propose a grounding arrangement for my [hypothetical] antenna and get some feedback on it. I have access to the solid-copper cold-water pipe that enters my home through the basement wall close to the basement floor. bad start This pipe is used [in addition to cold water] for the service entrance [circuit breaker box] ground. thats bad news I was thinking of putting an antenna outside on a pole and running the coax into the basement. nope, not the way to do it right. Then I would strip back several inches of the outer jacket of the coax [axposing the braided shield] and connect the coax braid to the cold water pipe using several hose clamps. This should ground the coax directly to the service ground - the single point ground for the house. except the single point shouldn't be 'inside' the house. I would add an arrester near the ground point. I would then run the coax upstairs [about 10 feet] to the radio, where it would [via the PL-259] connect to the transceiver chassis. The radio chassis will be electrically bonded to peripheral equipment chassis'. the radio chassis should be connected to the same single point ground, and not via just the coax shield. It seems that in the unlikely event [low altitude, semi-urban area] that the antenna were struck by lightning, the energy [albeit significant] would have no reason to propagate up to my station. Even though it may elevate my house ground by thousands of volts [with respect to some other ground point], the station should ride up with it - and little current should flow in the coax at the station. Am I whistling Dixie? Hopefully you are not really using the water pipe for a ground for your electrical service. Hopefully your plumbing is just bonded to the electrical ground. Dont even think about using this for lightning protection. Nothing like having lightning run in on your plumbing while taking a bath or have it run in on yor ground and eat about $7K worth of test equipment(my bad). Jimmie |
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