The 18” inch requirement is partially for damage resistance and partially to ensure adequate soil moisture for conductivity.
Content by Scott Typos by Siri On Jun 19, 2018, at 10:50 AM, jimlux <[email protected]> wrote: On 6/18/18 6:39 PM, Glenn Little WB4UIV wrote: > To do the grounding correctly, all connections exterior to the building are > to be welded. > The cable to ground rod welds are to be 18 inches below grade. > The exterior cable is to be number 2 copper or larger. > To bond numerous ground systems together, a number 2 copper cable is to be > buried at 18 inches and welded to each ground system. > If using eight foot ground rods, a ground rod is to be driven every 16 feet > along the connecting cable and the cable welded to the rod. It helps to know *why* some requirements exist - I suspect the 18" burial requirement is to avoid accidentally digging it up or damaging it. I can't think of an electrical reason for it. > A lot of work, but, cheaper, in the long run, than continuing to > repair/replace equipment. It depends Unless you're doing geodetic or precision timing work with a 2 or 3 band GPS, replacement GPS antennas are cheap. I'd worry about the receiver and related equipment, but the antenna itself might be sacrificial. As always, there's a risk/budget tradeoff _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://lists.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://lists.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
