[TowerTalk] Fwd: Fwd: Wire grounding question

[Hans Hammarquist]

Groundingthe shield (and not the return wire) at both ends is for shielding purpose, but Ibelieve, as long as the shield can carry any current from a lightningstrike (with it probably can't) it will enhance the lightningprotection as well. 


Hans - N2JFS



-----Original Message-----
From: Steve Dyer <w1srd at yahoo.com>
To: towertalk <towertalk at contesting.com>
Sent: Fri, Nov 22, 2013 8:42 pm
Subject: Re: [TowerTalk] Fwd:  Wire grounding question


Does grounding the shield on both ends enhance the shielding or is this 
for lightning protection?
73,
Steve
> In my humble: You shall ground the shield in both the tower end and the shack 
end. You should NOT ground the pair anywhere but at the controller, that is; you 
should only connect the wire pair to the magnetic sensor in the rotor and keep 
that assembly away from everything else (electrically). The wire pair should be 
connected to "high" and "low" at the controller and only see ground through the 
controller circuit. That should give you the optimal shielding.
>
>
> Hans - N2JFS
>
>
>
> -----Original Message-----
> From: Ray Benny <rayn6vr at cableone.net>
> To: TowerTalk <TowerTalk at contesting.com>
> Sent: Thu, Nov 21, 2013 3:02 pm
> Subject: [TowerTalk] Wire grounding question
>
>
> I am using a K7NV prop-pitch rotator for my almost completed tower project.
> For the encoder (magnetic pulse counter) that is mounted inside the PP
> motor, I am using a 2 pair small wire cable that has an aluminum foil
> shield and ground wire. I will be installing a lightning arrestor at the
> base of the tower for these two conductors.
>
> My question, should I ground this foil shield or leave it floating at both
> ends (PP rotator and rotator control box)? I would think that it should be
> grounded, but does it matter?  Any consequences if I do or don't?
>
> Ray,
> N6VR
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