There has to be a circuit. If you have a ground field or tower that will complete the circuit.
Sent from my iPhone > On May 24, 2019, at 7:30 AM, Josh Luthman <[email protected]> wrote: > > You just clamp that around a ground rod and it gives you ohms, resistance to > earth? Is it really that simple? > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > >> On Thu, May 23, 2019 at 10:01 AM Lewis Bergman <[email protected]> >> wrote: >> R56 is a standard developed by Motorola for critical communications sites. >> Chuck can likely point you to a similiar standard developed by NEC or some >> Telco consortium that defines grounding standards for telco facilities. Half >> the standards are usually about human safety and the other half are about >> equipment safety. >> >> The bottom line is, if you can get your site to less than 5 Ohms earth >> resistance to ground you are about as good as you can hope for. Lower is >> better but below 5 Ohms the return on investment diminshes rapidly. I think >> the lowest I have seen is 0.5 Ohms on a brand new site. We put a lot of >> grounding, enhancemnet material, etc. But it is like good insurance and it >> does work. We had an old tower that had poor grounding. We retrofitted it >> with a modern system and lowered the number of strikes from an average of 15 >> or so a year to 1 in 3 years. >> >> You can use a device like this: Clamp on ground tester to easily measure the >> resistance of a whole site. You do have to know where and how to use it. To >> accurately measure parts of a grounding system accurately you have to know >> how it is designed. Most of the time a zer resistance reading means you are >> measuring a loop of copper. I laugh every time I go to a cell site and they >> have a ground test pound that is basically a loop on top of a ground rod. >> Yaeh, no wonder they passed the test. >> >>> On Wed, May 22, 2019 at 9:32 PM Chuck McCown <[email protected]> wrote: >>> Google “Air Terminal Lightning” and then click on images. >>> >>> Or just check out some of these: >>> >>> https://www.erico.com/category.asp?category=R2438 >>> >>> https://www.jjengineersindia.com/lightning-protection-system.html >>> >>> https://www.jmvearthing.com/early-streamer-emmission.html >>> >>> This one has some snake oil type of hype too: >>> >>> http://www.lps-pacifica.com/Ellips.html >>> >>> Ever read “Something Wicked This Way Comes”? >>> >>> >>> From: Matt Hoppes >>> Sent: Wednesday, May 22, 2019 7:16 PM >>> To: AnimalFarm Microwave Users Group >>> Subject: Re: [AFMUG] Fw: Active Lightning Suppressor - Snake Oil, or >>> Science? >>> >>> So if this is all snake oil - why do some commercial towers have some >>> variation of this at the top? >>> >>> That’s what I’m trying to understand. >>> >>> An engineer for clear channel told me he’s seen a corona develop around one >>> of his towers that had a similar item on it when storms are coming through >>> the area. >>> >>>> On May 22, 2019, at 2:56 PM, Bill Prince <[email protected]> wrote: >>>> >>>> My SO is unusually wary of lightning and lightning strikes. If there is >>>> the slightest hint of lightning or thunder, she reverts to the air gap >>>> method of lightning protection. If there are no wires connected to a piece >>>> of electronics, then it is most safe. >>>> >>>> Doesn't help a lot in our business, but that is what she does. >>>> >>>> >>>> >>>> bp >>>> <part15sbs{at}gmail{dot}com> >>>> >>>>> On 5/22/2019 11:51 AM, Matt Hoppes wrote: >>>>> Are you suggesting that if you power off the equipment during a lightning >>>>> strike it won’t take damage? Why would that be? >>>>> >>>>>> On May 22, 2019, at 2:42 PM, dave <[email protected]> wrote: >>>>>> >>>>>> I have been working with this AS3935 franklin lightning sensor for about >>>>>> 6 months now and learned so much more about lighting and its projected >>>>>> energies and possible frequencies its amazing how this little sensor can >>>>>> detect distance and the amount of energy BEFORE it strikes. >>>>>> So,armed with this ability I am solely working on a design along with IR >>>>>> sensing to help mitigate damage to a site during a storm. >>>>>> >>>>>> I am still working on the timing to be able to shut down power to the >>>>>> gear outside for a time period at which if lightning is still present >>>>>> remain off till storm passes. >>>>>> >>>>>> End of Run sites are the worst but knock on wood after a year or 2 of >>>>>> planning and cleaning up the existing grounds everything seems well. >>>>>> >>>>>> >>>>>> >>>>>> <Vcard.jpg> >>>>>> On 5/22/19 9:23 AM, [email protected] wrote: >>>>>>> This is from the executive director of the lightning protection >>>>>>> institute. >>>>>>> >>>>>>> -----Original Message----- From: Bud VanSickle >>>>>>> Sent: Wednesday, May 22, 2019 7:41 AM >>>>>>> To: 'Chuck McCown' >>>>>>> Subject: RE: [AFMUG] Active Lightning Suppressor - Snake Oil, or >>>>>>> Science? >>>>>>> >>>>>>> Snake oil for sure. You can't stop lightning strikes because of the >>>>>>> volume >>>>>>> of energy and short time period. If you put one of these devices on a >>>>>>> fully >>>>>>> grounded metallic tower, it would most likely take a strike to ground. >>>>>>> Of >>>>>>> course, if you ground your metallic tower properly, it is like a giant >>>>>>> lightning rod, so you are out the money for this "topper". By the way, >>>>>>> on >>>>>>> tall towers, lightning doesn't necessarily strike the top anyway - it >>>>>>> is >>>>>>> almost never straight vertical and may be at a 45 degree angle to the >>>>>>> side. >>>>>>> But let me ask you this - if all the pine needles in a forest can >>>>>>> release >>>>>>> ions (which they can and do) or all the blades of grass on the prairie, >>>>>>> why >>>>>>> does lightning still strike there? >>>>>>> Bud VanSickle >>>>>>> >>>>>>> -----Original Message----- >>>>>>> From: Chuck McCown [mailto:[email protected]] >>>>>>> Sent: Wednesday, May 22, 2019 7:51 AM >>>>>>> To: [email protected] >>>>>>> Subject: Fw: [AFMUG] Active Lightning Suppressor - Snake Oil, or >>>>>>> Science? >>>>>>> >>>>>>> I think snake oil. You? >>>>>>> >>>>>>> >>>>>> >>>>>> -- >>>>>> AF mailing list >>>>>> [email protected] >>>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>> >>>> -- >>>> AF mailing list >>>> [email protected] >>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> >> -- >> Lewis Bergman >> 325-439-0533 Cell >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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