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Re: [TowerTalk] RF and AC Cables In Buried PVC

To: towertalk@contesting.com
Subject: Re: [TowerTalk] RF and AC Cables In Buried PVC
From: jimlux <jimlux@earthlink.net>
Date: Mon, 18 Apr 2016 05:37:12 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On 4/17/16 6:17 PM, Tony wrote:
All:

I'm in the process of getting materials together to run both RF and AC
service cables from the house to a shed. I was going to install separate
schedule 80 PVC pipes, but before I do, I was wondering if it's possible
to run both types of cable in the same pipe? Are there any drawbacks,
safety or otherwise when running both through a single pipe?

You generally should not run "low voltage" circuits in the same conduit as AC power (in fact, the electrical code prohibits it). The risk is of the AC line shorting to the low voltage circuits: since low voltage circuits are generally limited energy, they don't have over current protection, safety bonding, etc., so a short might flow enough current to start a fire or shock someone. (and, of course, blow up your receiver and transmitter)

There are some techniques that would make it legal, but would require more time to explain to the inspector than it would take to just lay the second conduit in the same trench as the first one.


The RF cables are for a VHF / UHF array - the AC cables will power the
lighting inside the shed.

Thanks,

73, Tony
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