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Re: Grounding Shielding

Posted by Fog Top on Aug 11, 2017; 9:03pm
URL: https://www.es-forum.com/Grounding-Shielding-tp4030801p4030814.html

Sailplane wrote:

plenty of current is flowing down into the earth through this copper pipe.

If you live in civilization, the earth is carrying a magnetic field from our outdated Wye electrical distribution system.  Because of it's poor design, earth around your home is going to be carrying this field with some homes being in a better spot than others.

The magnetic field is traveling from the earth outside your home where your metal pipes touch it and carried in onto the house metal pipes.  The PVC splice, just a small piece, near where the water pipe enters and just before it leaves the house such as outside spigots where the splices need to be placed to stop the mG from traveling on the copper.  The field entered pipes in my basement and two stories up I would get a head jolt when turning on bath water.  Even though it was a low magnetic field, I got very affected when sitting on a first floor chair which was over the pipes.  Gas pipes touching earth and entering a home can also carry high magnetic fields and should be fixed by the utility with a dielectric.  I found 25 mG on gas lines coming into a local church.  RF shielding will not block magnetic fields.  I used a gator clip plugged into the ground of an electrical outlet for my RF wall shielding foil at another house, otherwise it was a shocking experience when touching it.  I highly suggest you talk with BruceM since he's an expert on grounding issues.  Most electricians are clueless about magnetic fields being a problem, but as we ES know, they cause a world of hurt.

From: sailplane [via ES] <ml+[hidden email]>
Sent: Friday, August 11, 2017 7:03 PM
To: Fog Top
Subject: [ES] Re: Grounding Shielding
 
It's all metal.  Metal comes in, metal throughout the home.

The electrical panel has a grounding wire that hooks to the metal copper. There is high V/M with ED88T on this wire, and high M.  So the electrical panel is grounding into the copper water pipe, and plenty of current is flowing,.. the pipe has turned greenish and the grounding connector has oxidized and rusted, .. I put a new one.  But obviously, plenty of current is flowing down into the earth through this copper pipe.

It is not flowing up towards my house though, the pipes upstairs do not have magnetic fields, so I don't know if I should be worried about it.
I have a water softener with water pipes that stops the current(like you say), but, I also put a jumper wire across, and with jumper/without, still no M fields upstairs.
I have gas pipes as well which are connected to the water lines, to ground them.  If I don't have a jumper across the softener, then I'm not sure if it's ok to have the gas lines not grounded to the same place as the electrical panel..  
Also, I have a furnace that I think is grounded to the electrical ground inside it, and the furnace ductwork touches the water pipes... So I think no matter what I do, things will always be touching the electrical ground.. But my shielding can at least be away from it.

I am mostly looking for what to do with my shielding foil.. if I leave it un grounded, I get high V/M, is it ok to leave it like that then if connecting to ground makes it worse?..

Maybe it's something else that absorbs electrons other than ground that I could use =)?



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