Local code can always override NEC but I have found 95% of the country
follows it with a local twist here and there. I'm a retired Electrician and
if you pull a permit (Always a good ideal) most inspectors will guide to
what they want to see. 2 things they always look for did you label the panel
and chalk your conduit entries points. Radio Towers are now covered in the
latest NEC on how they should be grounded. 73 Gene AA4VX
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim
Lux
Sent: Saturday, May 25, 2013 4:57 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Need Help For Cable Runs To Tower
On 5/25/13 1:02 PM, Eugene Jensen wrote:
> Drilling holes in conduit for drainage is not a good ideal. It going
> to be full of water in time. As long as your trench is 18 " or deeper
> you could use UF #6-2 with ground to keep the voltage drop under 3%.
> And the run your control/Rf cables in the same conduit, It you using
> hard line just bury it in the trench. 73 and good luck with your tower
> project. Gene AA4VX
>
CHeck your local codes, if you're concerned. around here (Thousand Oaks), UF
is not allowed for direct burial. Underground has to be in a raceway (code
speak for conduit). There's various burial depths depending on the kind of
conduit (plastic, thinwall metal (EMT), or thick wall metal) and whether
it's under a concrete slab or similar.
The depth is all about damage to the wires (since frost is a non issue).
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