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Re: [TowerTalk] Question about ground

To: Matt Fearnow <>
Subject: Re: [TowerTalk] Question about ground
From: K8RI <>
Date: Fri, 14 Sep 2012 12:35:29 -0400
List-post: <">>
On 9/14/2012 12:10 PM, Matt Fearnow wrote:
Hey one final question.  Should I tie in my copper water pipe to this
ground as well?

Here it's required by code even though the pipe is copper only to the basement wall and becomes plastic from there on out to the main at the road. Actually the only metal in the water system is the meter and the hot water heater (at opposite ends of the house) and both must be grounded. All pipes in the house are plastic. I was surprised I didn't have to ground the faucets<:-))

Copper, all the way to the road makes a better ground than the ground rods just outside the entrance.


Roger (K8RI)

  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 <
<>> 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
            (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

        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.


    Roger (K8RI)

        73, Jim K9YC

        73, Jim K9YC

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