[TowerTalk] Question about ground

[Matt Fearnow]

Hey one final question.  Should I tie in my copper water pipe to this
ground as well?  It runs from the road to the house (~100') buried 8ft deep
3/4 copper.  My only other thoughts, is this also ties in to my whole house
with ground, meaning not sure of the back tie of the electrical properties
of doing this.  But reading the motorola commercial installation it says to
tie all grounds together.

Thanks getting close to being on the air.

73 - Matt - W9SIG

On Sun, Sep 9, 2012 at 9:40 PM, K8RI <K8RI-on-TowerTalk at tm.net> wrote:

> On 9/9/2012 9:06 PM, Jim Brown wrote:
>
>> On 9/9/2012 6:01 PM, Matt Fearnow wrote:
>>
>>> Well the electrical service comes in to the back of the house.  I need to
>>> go from there to the side and up to the front to where the entrance into
>>> the basement where my shack will be.  A few years ago, an engineer
>>> (now SK)
>>> had advised me to tie all grounds together, from the electrical, to the
>>> "tower", to the cable shields, to the ground plate in the house for the
>>> gear.
>>>
>>
>> You got excellent advice.
>>
>>     IIRC, was to allow all points to have equal paths to ground.
>>>
>>
>> Sort of -- the intent is to have all parts of the building stay as close
>> as practical to the same potential.  It won't be perfect, because
>> lightning will induce current on that wiring too, by virtue of its
>> proximity, so think of this very good practice as minimizing the
>> potential for damage.
>>
>>> Else if not, if current came in from the eletrical panel, through the
>>> gear, and
>>> out through their ground (if that was the shortest path)
>>>
>>
>> That certainly can happen.
>>
>
>
> Yup. Even with a single point ground the instantaneous potential can be be
> thousands of volts between one end of the house and the other, but that is
>  not normally a problem.
>
> The idea is to minimize voltage differences in equipment. It won't be
> perfect as not all the conductors follow the same paths even if they are
> grounded at the same point.
>
> 73
>
> Roger (K8RI)
>
>
>> 73, Jim K9YC
>>
>> 73, Jim K9YC
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