[time-nuts] GPS Antenna Grounding/Lightning protection.

[Scott McGrath]

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 <jimlux at earthlink.net> 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




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