If you are isolating the ground system then be sure to also isolate the power system. If the best path to ground is through the power then surges are going to try to jump from the tower through your cables to your connection to the power grid.
Sincerely, Joshaven Potter MTCNA, MTCRE, MTCWE, MTCTCE, UACA Google Hangouts: yourt...@gmail.com Cell & SMS: 1-517-607-9370 supp...@joshaven.com > On Oct 26, 2015, at 2:57 PM, Gino Villarini <ginovi...@gmail.com> wrote: > > It seems that keeping up with proper grounding its a huge undertaking! is > there a easier way? Isolate all gear with SC40 PVC mounts? > > On Mon, Oct 26, 2015 at 1:37 PM, Chuck McCown <ch...@wbmfg.com > <mailto:ch...@wbmfg.com>> wrote: > 550 ohm ground.... > Wow, they may have been better floating the tower. > > From: Joshaven Mailing Lists <mailto:lis...@joshaven.com> > Sent: Sunday, October 25, 2015 7:00 PM > To: af@afmug.com <mailto:af@afmug.com> > Subject: Re: [AFMUG] Site Grounding - what we are doing wrong? > > http://www.copper.org/applications/electrical/pq/casestudy/orange_county_A6088.html > > <http://www.copper.org/applications/electrical/pq/casestudy/orange_county_A6088.html> > > > Sincerely, > Joshaven Potter > MTCNA, MTCRE, MTCWE, MTCTCE, UACA > Google Hangouts: yourt...@gmail.com <mailto:yourt...@gmail.com> > Cell & SMS: 1-517-607-9370 <tel:1-517-607-9370> > supp...@joshaven.com <mailto:supp...@joshaven.com> > > > >> On Oct 25, 2015, at 6:37 PM, Ken Hohhof <af...@kwisp.com >> <mailto:af...@kwisp.com>> wrote: >> >> Well, not necessarily. It is possible to turn grounding and shielding into >> a religion and lose track of what they are accomplishing. >> >> For example, the power company guy in up in the bucket doesn’t rely on >> grounding to protect him from high voltage, and neither do the birds sitting >> on the wires. I’m not saying TJ is right, but be careful of adding more >> grounding without thinking about what you are grounding, to what, and why. >> >> I also wonder if Gino is seeing this everywhere, or just at a few towers. I >> think some towers have problems and you can’t fix it without going beyond >> just your equipment. >> >> If it’s everywhere, did this coincide with a change to a different >> brand/model of radios? >> >> From: Mike Hammett <mailto:af...@ics-il.net> >> Sent: Sunday, October 25, 2015 5:06 PM >> To: af@afmug.com <mailto:af@afmug.com> >> Subject: Re: [AFMUG] Site Grounding - what we are doing wrong? >> >> If what you've done isn't working, then it isn't enough, not that it's too >> much. >> >> >> >> ----- >> Mike Hammett >> Intelligent Computing Solutions >> http://www.ics-il.com <http://www.ics-il.com/> >> >> From: "TJ Trout" <t...@voltbb.com <mailto:t...@voltbb.com>> >> To: af@afmug.com <mailto:af@afmug.com> >> Sent: Sunday, October 25, 2015 5:04:32 PM >> Subject: Re: [AFMUG] Site Grounding - what we are doing wrong? >> >> Gino, >> >> Try not grounding at all? >> >> >> >> On Sun, Oct 25, 2015 at 1:39 PM, George Skorup <geo...@cbcast.com >> <mailto:geo...@cbcast.com>>wrote: >>> I have no doubt it's the SS clamping that's blowing the fuse. If there was >>> no fuse, I bet the SS would continue clamping and start smoking if there's >>> enough current to supply it. I don't know if it helps save things, but I'm >>> leaning towards yes. Just getting all of the radios on the same DC bus >>> seems to have helped quite a bit as well. >>> >>> On 10/25/2015 12:51 PM, Ken Hohhof wrote: >>>> Speaking of fuses, I know sometimes we get overcurrent trips on CTMs and >>>> SyncInjectors and have to reset them. Very rare, but always during >>>> storms. It is possible this is saving radios, I can't say for sure. >>>> >>>> >>>> -----Original Message----- From: George Skorup >>>> Sent: Sunday, October 25, 2015 12:34 PM >>>> To: af@afmug.com <mailto:af@afmug.com> >>>> Subject: Re: [AFMUG] Site Grounding - what we are doing wrong? >>>> >>>> One thing we've been doing for several years now is a bonding wire up >>>> the tower. I do not trust the tower steel/leg joints being low enough >>>> resistance. Failure rate went way down. DC and fuses doesn't hurt either. >>>> >>>> On 10/25/2015 10:57 AM, Gino Villarini wrote: >>>>> So we are loosing radios left and right due to lightning! >>>>> >>>>> Typical site setup: >>>>> >>>>> Radios on tower grounded to tower >>>>> >>>>> Shielded cable >>>>> >>>>> Shielded patch panel - grounded >>>>> >>>>> Regular cat5 jumpers >>>>> >>>>> Wbmfg SS - grounded >>>>> >>>>> Regular cat5 jumpers >>>>> >>>>> Poe device >>>>> >>>>> What's wrong? > > >
