It is a ridiculously low threshold. I hate those GFCI circuits. From: Ken Hohhof via Af Sent: Sunday, September 28, 2014 11:00 AM To: af@afmug.com Subject: Re: [AFMUG] Gear in Tower - Grounded or Isolated?
Yeah, if that was true, you would trip any GFCI which looks for sneak current flowing back through ground rather than neutral. I forget how much but it doesn’t take much imbalance between hot and neutral current to trip them, something like 10 mA, because that could be going through you. From: Kurt Fankhauser via Af Sent: Sunday, September 28, 2014 11:30 AM To: af@afmug.com Subject: Re: [AFMUG] Gear in Tower - Grounded or Isolated? if you take an outlet thats not wired up i am pretty sure there is no continuity between the ground lug and neutral.... then once you wire it in to the breaker box it has continuity because the breaker box has a connection between the neutral and ground Sent from my iPhone Kurt Fankhauser Wavelinc Communications P.O. Box 126 Bucyrus, OH 44820 http://www.wavelinc.com tel. 419-562-6405 fax. 419-617-0110 On Sep 28, 2014, at 11:50 AM, That One Guy via Af <af@afmug.com> wrote: neutral is tied to mechanical ground anywhere there is an outlet anyway. the ground lug on an outlet has continuity to neutral, I dont know why On Sun, Sep 28, 2014 at 9:42 AM, Ken Hohhof via Af <af@afmug.com> wrote: Ground and neutral are not the same. Yes, they are tied together somewhere, probably the transformer. But you should not use the neutral as a ground or tie it to your ground anywhere. From: Kurt Fankhauser via Af Sent: Sunday, September 28, 2014 7:38 AM To: af@afmug.com Subject: Re: [AFMUG] Gear in Tower - Grounded or Isolated? I have a grounding question for the cabinet at the base of the tower. My electrician wired in the incoming power to the cabinet but he did not bond the cabinet ground/neutral to the actual tower itself. Tower has its own separate ground rods and cabinet ground actually is back where the meter base is, (over 150 feet away) Should I bond the tower and the cabinet together? I already have electrical conduit running out of the cabinet and then attaches to the tower itself so there is metal to metal contact just wondering if I should have something better.... Kurt Fankhauser Wavelinc Communications P.O. Box 126 Bucyrus, OH 44820 http://www.wavelinc.com tel. 419-562-6405 fax. 419-617-0110 On Sun, Sep 28, 2014 at 8:19 AM, Gino Villarini via Af <af@afmug.com> wrote: I do think too that isolating its easier and should be the way to go… DC plant, fiber up. Problem would be mounts and tower attachments… thinking of using PVC conduit? Gino A. Villarini President Aeronet Wireless Broadband Corp. www.aeronetpr.com @aeronetpr From: "af@afmug.com" <af@afmug.com> Reply-To: "af@afmug.com" <af@afmug.com> Date: Sunday, September 28, 2014 at 7:48 AM To: "af@afmug.com" <af@afmug.com> Subject: Re: [AFMUG] Gear in Tower - Grounded or Isolated? Great question Gino. I hope we get some good input. My opinion is that you have to be completed isolated or extremely properly grounded. Both can be complicated, but the second way being the most complicated Paul From: Af [mailto:af-bounces+paulm=pdmnet....@afmug.com] On Behalf Of Gino Villarini via Af Sent: Sunday, September 28, 2014 7:31 AM To: af@afmug.com Subject: [AFMUG] Gear in Tower - Grounded or Isolated? I remember the good old days that most of our network was based on Canopy Classic: The radios were isolated form the tower, minor lightning issues.. Nowadays its has turned into a big issue for us, radios and MW getting zapped! Were do I start? Should I go back to the Isolation model and have all gear in tower isolated from the tower in any way possible? Gino A. Villarini President Aeronet Wireless Broadband Corp. www.aeronetpr.com @aeronetpr -- All parts should go together without forcing. You must remember that the parts you are reassembling were disassembled by you. Therefore, if you can't get them together again, there must be a reason. By all means, do not use a hammer. -- IBM maintenance manual, 1925
