Re: house electricity entry point
Posted by S Andreason on Jun 18, 2012; 3:31pm
URL: https://www.es-forum.com/house-electricity-entry-point-tp4022102p4022134.html
russel395 wrote:
> Thanks Stewart. I did some body voltage measurements a while back and that room was no worse than the rest of the house and actually a little lower. Maximum of 2.5 V in that room (living room) compared to max measurements in the kitchen, den, and bedroom all around 5 V. By the way, how do these measurements compare to a typical house?
>
I measure 2.5 - 3.0 V AC when standing under the local power line,
single phase, only powering < 20 homes. I consider this way too high.
Also here a gauss meter reads 1.0 - 2.0 mG, depending on how many
appliances are on.
I put everything here in metal conduit when we built this house, so only
cords plugged in to the wall radiate.
Typical here is 0.120 V, unless touching or getting near a cord, then up
to 1.0 V.
Standing on a concrete floor with rebar in it can also read higher, 0.9 V.
This last example goes to zero when the county wide power grid is off.
Walking outside away from the power line, at 1000 ft, the body voltage
finally reaches zero. Gauss meter reads 0.1 - 0.15 mG. It seems my gauss
meter doesn't go below 0.1 when on.
> I have not done Gauss meter measurements. Is there a particular meter available for purchase that you would recommend?
>
I like Dr.Gauss. It is simple, analog, and picks up more than the
digital gauss meter I tried.
I need to get my hands on a Cornet ED-75, to test how it compares.
> I don't know what ground loops are and so didn't understand what you were saying there.
The wiring Should extend outward from the circuit breaker panel, in a
star pattern. No circuits should touch or "loop" around with any other
circuits, thus creating multiple paths.
In order to keep the magnetic field small, the hot wire should be right
next to the neutral return path. Otherwise, the two wires don't cancel
each other out, and the field encompasses the rooms along the amperage path.
This is a common mistake with ground wiring, as everything gets hooked
up to ground! Unfortunately, this can lead to amps moving along paths in
circuitous manner. Fortunately, there should not be Current moving by
ground wire.
But really old wiring used neutral for ground, or to say they used only
two-wire cables instead of today's three. This I've seen even in modern
building, by cheap contractors that really don't know how electricity works.
Almost as bad as leaving the ground un-attached. I got a 50V shock once
off a computer case because of that.
Stewart