My water meter is outside and the feed to the house is via plastic pipe.
My electrical panel ground is connected to the plumbing at the point closest to
the electrical panel.
There is a piece of copper pipe soldered across the cold and hot water pipes
near the water heater.
Mike N2MS
----- Original Message -----
From: Tim Shoppa <tshoppa@gmail.com>
Cc: topband@contesting.com
Sent: Fri, 30 Oct 2015 18:47:57 -0000 (UTC)
Subject: Re: Topband: RFI - and lots of it
I assumed the "central point" Jim was referring to, was a central point for
the plumbing. For the electrical side, this is a no brainer, it has to be
the entrance panel.
I have observed in my neighborhood, that the plumbing is usually bonded to
ground just after the water meter. That seems like a "central point" to me.
The bonding wire can be very long if the electrical service panel is on a
different side of the house than the water main.
My county's codes also requires that there be some kind of jumper for
ground outside the water heater between the cold in pipe and hot out pipe.
I don't know if this is a safety requirement or they are trying to divert
electrolysis to prolong life of the water heater.
I think other counties have a requirement that there be a similar jumper
around the water meter or around the shutoff valves near the water meter.
The folklore I've heard with that, is that this was needed when the
electrical code was OK with using cold water pipe as an electrical ground.
Tim.
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