[Elecraft] OT: Ground rods and concrete

[Rick Dettinger]

The Electric Utility Industry spends a lot of money bypassing steel reinforced concrete tower legs with copper conductor to a ground system for lightening protection.

73, Rick  K7MW

 
> On Apr 18, 2017, at 7:16 AM, JOE <k1ike at snet.net> wrote:
> 
> Well, in my cellular experience of watching many tower and monopole installations, tower grounds going thru concrete was generally not allowed.  Several reasons that I have been told are moisture in the concrete can turn to steam during a direct lightning hit, damaging the concrete base material.  Ground conductors can be damaged by chemical reaction from contact with the concrete and moisture.  Lastly, you cannot do routine inspections on ground conductors that pass thru the tower base.
> 
> Tower grounding specifications are detailed in Motorola R56 Standards and Guidelines Manual.  This shows the ground conductors outside the concrete tower base.
> 
> Joe
> 
> On 4/18/2017 8:05 AM, elecraft-request at mailman.qth.net wrote:
>> Message: 3
>> Date: Mon, 17 Apr 2017 21:32:02 -0600
>> From: "Doug Renwick"<ve5ra at sasktel.net>
>> To: "'Elecraft Reflector'"<elecraft at mailman.qth.net>
>> Subject: Re: [Elecraft] OT: Ground rods and concrete
>> Message-ID: <191B5755E4654B65951378A9EF28A8F1 at DOUG8PC>
>> Content-Type: text/plain;	charset="us-ascii"
>> 
>> That myth refuses to die. I have 5 concrete tower bases with ground rods
>> partially encased and never a worry about an exploding base.
>> 
>> Doug
> 
> 
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