[TowerTalk] bonding to AC power box or inside fuse panel?

[Joe Subich, W4TV]

On 1/21/2013 6:13 PM, vk3pa at vk3pa.com wrote:
 > I run rf earth separated from the Power ac supply service no
 > connection between the two.. de vk3pa

Not good practice in the US.  Power supply ground (as opposed to
neutral) and RF earth ground should be the same.  Otherwise any
lightning induced surge on one or the other will result in a voltage
difference between the the two which *will* equalize by moving current 
*through* the chassis of any equipment connected to both the power
supply "safety" ground and the RF ground.

This is a recipe for significant lighting or power supply induced
damage.  *Always* bond the RF ground and the power "entrance" ground
together via a path that *does not* place any equipment between the
two "grounds".

73,

    ... Joe, W4TV


On 1/21/2013 6:13 PM, vk3pa at vk3pa.com wrote:
> I run rf earth separated from the Power ac supply service no connection
> between the two.. de vk3pa
>
>
> Quoting Jeff Blaine <keepwalking188 at yahoo.com>:
>
>> Question on the optimal routing of strap to realize a single point
>> ground.
>>
>> My shack antenna entrance panel and the mains AC power meter box are
>>  along one wall ? separated by about 20?.  There is a ground system
>> under the antenna entrance panel ? with the usual set of polyphasers
>>  for the coax and MOV for the control lines.
>>
>> The breaker boxes are on the inside of the same wall, a couple of
>> feet below the power meter mains inlet.
>>
>> The shack is centered along the same inside wall; about 5? from the
>> breaker box on the left, and about 15? or so to the antenna entrance
>>  panel.  On the shack table is a bus-bar where the gear is
>> individually connected to in a star-configuration; one braid-type
>> jumper from the bus bar to each shack rig or accessory.
>>
>> What?s the best way to effect a single point ground in this combination?
>>
>> I think that a single strap run from the bus-bar to the antenna
>> entrance box.  And another run from the bus-bar to the breaker box.
>>  Both of those runs would be inside the house and along the shack
>> wall.  However, I also see that it?s desirable to bond the meter to
>> the antenna entrance panel outside of the house.  Or should I do
>> both?  Or something else?
>>
>> Thanks.
>>
>> 73/jeff/ac0c
>> www.ac0c.com
>> alpha-charlie-zero-charlie
>>
>> _______________________________________________
>>
>>
>>
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>
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