[TowerTalk] [Bulk] Antenna to Shack Ground Connection
Patrick Greenlee
patrick_g at windstream.net
Tue Feb 3 17:42:02 EST 2015
I think you did very well. I agree with your comment that it is a one
time expense so worth doing well and maybe some peace of mind in the
bargain too. Hard to fault bigger than minimum specs when facing so
powerful a potential event .
I'll probably settle for less than the best possible design due to
constraints of $ but will likely go with ARRL affiliated insurance to
hedge my bets and also get a little peace of mind. A rough order of
magnitude sort of comparison tends to direct me toward insurance vs
sinking huge outlays and not ever getting 100% protection. I hope I
choose wisely in deciding how much to spend on good grounding vs
insurance. I will opt for doing what I reasonably can to keep lightning
out of the shack as mine is in occupied living space and meet or exceed
code on outside efforts letting insurance "worry" about equipment only
risks due to a threat exceeding my system's protective capabilities.
Good luck to us both,
Patrick NJ5G
On 2/3/2015 3:00 PM, Bryan Swadener via TowerTalk wrote:
> Patrick,
> 1. Neither of us have any idea whether my licensed PE did (or did not do) any calculations. Since it's his job to know and he's done it for decades, I trust his opinion. However, to satisfy you, I'm willing to pass my PE's contact information to you (off list) so you can ask him if he did any calculations. Please don't tell him I referred you.
> 2. 2/0 is a safer bet than smaller gauge wire. Since the potential loss is great, I'd rather err on the large side. And again, it is a ONE TIME investment. Unlike many penny-wise and pound foolish hams, when my butt is on the line, I have no issues with spending more as long as the pocketbook allows. Compared to the overall cost of installing a used TX472 + F12 C-4XL, the cost of 2/0 wire was less than tiny.
>
> vy 73,
> Bryan WA7PRC
>
> Date: Tue, 03 Feb 2015 07:58:06 -0600
> From: Patrick Greenlee
> Subject: Re: [TowerTalk] [Bulk] Antenna to Shack Ground Connection
>
> It is unlikely that he did calculations to arrive at his 2/0 statement.
> More likely it is a "stock" prescription that works with all interested
> parties and likely serves its intended purpose. Frequently practitioners
> of a discipline give stock answers to stock problems. Do not assume
> your specific case got special custom treatment. That is unlikely.
>
> Patrick NJ5G
>
>
> On 2/3/2015 3:14 AM, Bryan WA7PRC via TowerTalk wrote:
>> When I erected my tower, my PE (a ham who was recommended by TT people) wrote:
>>
>> "Each tower leg shall be bonded to one ground electrode minimum using 2/0 or equivalent wire">
>> I presume he knows of what he writes. Since it's a one-time investment and I didn't want to PO my PE> (and also not pass my county's final inspection), I just did what he wrote.>
>> vy 73,> Bryan WA7PRC
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
More information about the TowerTalk
mailing list