-V or what I prefer to say Positive earth ground systems came from two sources.
My preferred story is that buried and underground telephone cables. When they
get damaged, the positive ground, negative on the telephone line cause ions in
the soil to move toward the telephone line. Thus plating various metals onto
the wire at the spot of the fault. If it was reversed it would move all the
copper from the wire into the soil.
The other story has to do with electric trollies. Same reason, track
corrosion. Not sure which came first. Or really whether either is true.
Chemically the telephone cable story is true.
From: Steve Jones
Sent: Monday, April 8, 2019 1:08 PM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] DC/DC converter question
I still have a hard time grasping the -/+ thing, im half moron and 50 percent
idiot though. But am I correct that -v keeps devices from corroding as much?
On Mon, Apr 8, 2019 at 1:53 PM Bill Prince <part15...@gmail.com> wrote:
+1.
Just had a discussion with someone talking 12V power in RVs, and he
insisted that red was negative and black was "hot". I walked away from
the discussion before we resorted to fisticuffs.
bp
<part15sbs{at}gmail{dot}com>
On 4/8/2019 10:35 AM, ch...@wbmfg.com wrote:
> Never trust colors.
>
> -----Original Message----- From: Christopher Tyler
> Sent: Monday, April 8, 2019 11:23 AM
> To: AnimalFarm Microwave Users Group
> Subject: Re: [AFMUG] DC/DC converter question
>
> That was what I thought, thank you all for confirming.
> However, with it connected red+/black-, when our tech flipped the
> breaker it blew out the DC/DC converter. In fantastic order, I was told.
> So I'm going to have them put a voltmeter to the wires and see what we
> are getting from the power supply, maybe the output wiring is wrong.
>
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