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Re: [TowerTalk] Running Cables - Shack to Tower

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Running Cables - Shack to Tower
From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Thu, 09 Jul 2015 20:10:05 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Although code requires they be separate, for a DIYer if it won't be inspected, you can do anything.

My preference is, if it will be carrying power (120 VAC) I'd run them separate mainly because of lightening and possible common mode noise pick up. (RF into the AC, or noise into the coax?) That you won't know without trying.

I'd be uncomfortable with a 200' run of intimately coupled control, power, and RF cables. I even run my CAT-5 Gigabit network separate, which is probably a good thing. Lightening got into the network last Summer and took out a router, 8 port switch, 3 NICs and one motherboard. It melted an RG45 into the UPS and welded the pins together, but no damage to the rig down stream although I'll never be able to use the network protection in that UPS again.

What would your insurance Co say if you had an expensive lightening strike?

73 es good luck

Roger (K8RI)

On 7/9/2015 3:52 PM, Mike Fahmie via TowerTalk wrote:
No 'compelling' reasons come to mind though my preference is to keep power and 
signal wiring separate.-Mike-WA6ZTY

From: William Fairbanks <Bill.Fairbanks@indstate.edu>
  To: "towertalk@contesting.com" <towertalk@contesting.com>
  Sent: Thursday, July 9, 2015 6:10 AM
  Subject: [TowerTalk] Running Cables - Shack to Tower
Hello,

I have a Rohn 25 up about 85'  located about 200' from my garage radio room. Is 
there some compelling reason  why I shouldn't  run  bury flex coax, rotor cable and 
outdoor 12-2 w gnd  through a 2" plastic pipe (already buried) between  the 
tower and my shack?

Bill Fairbanks, N9ela

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--

73

Roger (K8RI)


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