I think I am going to run a copper 12ga. Wire from the gable mount bracket to the ground wire that goes to the rod for the electrical service. This installation is not high at all, mabey 20' max and there are higher buildings all around me. Just need to bleed off the static.
Kurt Fankhauser WAVELINC P.O. Box 126 Bucyrus, OH 44820 419-562-6405 www.wavelinc.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Patient Sent: Wednesday, May 07, 2008 4:04 PM To: WISPA General List Subject: Re: [WISPA] Ground client radio??? It's hard to really predict how much induced voltage you will get from a surge. I guess it's one of those things that you just prepare for the worst and hope for the best. Obviously if the install is sticking up as the highest point on a hill, I'm going to take a little more care than one that is in the bottom of a valley. My problem is here in MO if they ain't on a hill they prolly ain't getting a signal anyhow:-( Jim Scott Reed wrote: > Right, but I have had at least one radio that was POE protected at entry > and the 12AWG from the case to ground kept the Ethernet port from blowing. > > Jim Patient wrote: > >> Scott, >> >> You might want to take a look at NEC 810. If you install an external >> antenna mounting pole or mast, it must be grounded. The conductor >> entry point must also be grounded (where the cat5 enters the >> building). This isn't just good practice, it's the law and if you >> don't follow the law you are setting yourself up for an ugly >> negligence case in the event of a fire or other catastrophic event >> that results from your installation. >> >> In Kurts' case, I would install a Citel PoE surge protector in the >> enclosure with the radio. Install an external grounding block at the >> conductor entry point. Use shielded cat5 with the trickle wire >> grounded. Copper coated ground rods are available at most companies >> that sell satellite installation hardware. >> >> In the attached picture, the radio survived this hit. Obviously the >> Citel didn't;-) >> >> Jim >> 314-565-6863 >> jeffcosoho.com >> >> Scott Reed wrote: >> >>> Since all you need is to bleed off the induced current, my normal way >>> is to run 12AWG from the radio to the electrical ground rod. This >>> has stopped a similar issue on a couple of radios for me. >>> >>> Kurt Fankhauser wrote: >>> >>> >>>> I've got a problem client radio that almost always needs attention >>>> after a >>>> lightning storm. It is mounted with a gable mount on an eve so the >>>> radio >>>> itself is not physically grounded which I think is where my problem is >>>> coming from. The cat5 wire is grounded with a tranzeo POE ground >>>> lead but >>>> that is not stopping the surges. I've got a RB532 board which has >>>> lost 3 >>>> ethernet ports due to surges on the POE line even while using the >>>> tranzeo >>>> POE's ground. Now I have never lost a radio at this location but I >>>> have lost >>>> 3 ethernet ports and 2 POE injectos. This last time around the radio >>>> actually defaulted back to factory defaults. Radio is a TR-5a-21. Now I >>>> suspect that if this radio was mounted to a TV tower and not the eve >>>> that I >>>> would not be having these problems since it would naturally be >>>> grounded. >>>> Anyone have any ideas on what I need to do to get this thing >>>> grounded. How >>>> heavy of guage do I need? >>>> >>>> >>>> >>>> Kurt Fankhauser >>>> WAVELINC >>>> P.O. Box 126 >>>> Bucyrus, OH 44820 >>>> 419-562-6405 >>>> www.wavelinc.com >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> ---------------------------------------------------------------------------- ---- >>>> >>>> WISPA Wants You! 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