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Re: [TowerTalk] Urgent: Should solar panel array be grounded to station

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Subject: Re: [TowerTalk] Urgent: Should solar panel array be grounded to station ground and/or house ground?
From: John W <>
Date: Tue, 9 Oct 2012 08:34:43 -0700
List-post: <">>
Hi Chas,
The current plan is this:
They are going to run a #8 ground stranded wire down from the rail system, 
following the same route as the electric wires, attaching it to the ground bar 
inside the load center subpanel up in the attic, then continuing from there 
down through the conduit to the ground bar inside the outside safety disconnect 
box, which will be installed a few feet above ground, and then continuing from 
there and attaching to the ground bar of the main house panel where the 
electrical connections are also being made.  Then relying on the ground from 
the main house panel out to a ground rod or two.  (Not sure what the builder 
has installed, it was 1998 and I wasn't here, but I'm going to email him and 
see if he remembers.)
In addition to the above, for lightning protection, I am also having them run a 
#6 stranded ground wire from the roof rail system straight down the side of the 
house to a 5/8" 8' ground rod which I am about to go and drive into the ground. 
That rod will eventually get tied to my perimeter ground as well, once I 
install it and the towers.
My question now is:  How many feet away from the house foundation should this 
rod be installed?
Also, a cad weld connection is probably ideal, but I don't have any OneShots on 
hand yet.  Should I clamp it for now and cad weld it later, or wait until I get 
my hands on a OneShot?  
Also, this being my first time using OneShots, how far below the ground surface 
should the connection be made? Does it matter?
Speaking of OneShots, who do you guys recommend as a good source for them?  I 
am going to need a LOT of them.  Do you do it yourself with a "no mold 
required" type, or is it worth getting the type that needs a mold, or is it 
better to hire a pro to do it?
I will have three towers all 70' to 120' and a perimeter ground hundreds of 
feet long, plus the three radial ground lines on each tower. So with ground 
rods every 15' that adds up to a LOT of cad welds.  It will be prudent to get 
them at the lowest available cost.


> Date: Tue, 9 Oct 2012 10:07:55 -0500
> From:
> To:;
> Subject: Re: [TowerTalk] Urgent: Should solar panel array be grounded to 
> station ground and/or house ground?
> On 10/9/12 8:13 AM, John W wrote:
> > Hoping for very quick answer to this question, because they guys are here
> > now and they need a decision today so they know where to run the wires.
> > (If you are reading this after 5 PM EDT on Oct 9, then you don't need to
> > spend any time replying, because it will be too late to change the
> > design.)
> > John W2ID _______________________________________________
> John, what did you end up doing isfa grounding your Solar Panel rails???
> Personally, I would have pulled an 8ga from each roof corner down the side of
> the house to a point about 3' above g.l. and then from there in a 45* angle
> out to a ground rod. Then below ground, tie the corner ground rods together
> around the house perimeter.
> And, I do NOT like the above suggestion I have just made either. So, what is
> the better suggestion???
> 73 chas k5dam

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