I have found that exposed THHN will loose it’s clear layer after a few years
exposed, BUT the vinyl coating stayed in tact for some time.
At my Old QTH my PropPitch rotors were feed with THHN I then and upgraded #10
UF wire and am using it at this QTH for 30 years with no problems,
I transition form the UF to flexible cable from a WX proof junction box
YMMV
Wayne ,W3EA
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
From: Richard (Rick) Karlquist<mailto:richard@karlquist.com>
Sent: Tuesday, December 10, 2019 3:45 PM
To: john@kk9a.com<mailto:john@kk9a.com>;
towertalk@contesting.com<mailto:towertalk@contesting.com>
Subject: Re: [TowerTalk] Orion 2800 Rotator Cable Replacement
On 12/10/2019 12:27 PM, john@kk9a.com wrote:
> I was also curious why rotator cable needs replacing, perhaps
> wear/damage from the crank-up tower? FWIW, I have been using THHN house
> wire for my rotators for decades without no issues.
>
> John KK9A
That's surprising. I found that THHN loses its clear outer layer
after only a few years in the sun, let alone decades.
Rick N6RK
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