@VD15 it was a common practice to use water pipes as "ground" wire because those are metal, go into literal ground and pretty much go through entire building.

However rubber hoses and plastic tubing as well as other safety concerns made it... less popular.
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@hj @VD15 I talked with people recommending connecting ground to a lightning rod in an apartament building that doesn't provide a ground connection. That's when I understood where the myths about disconnecting electrical appliances from sockets during a thunderstorm come from.

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