PSE SEE MY COMMENTS IN ALL CAPS BELOW.
Charles Harpole
k4vud@hotmail.com
> From: 4cx250b@miamioh.edu
> To: amps@contesting.com
> Date: Tue, 15 Oct 2013 07:12:12 -0600
> Subject: Re: [Amps] More on two pin 220vac
>
> Paul has raised a pertinent issue. I find it hard to believe that the power
> distribution in Thailand or any other country is completely floating with
> respect to ground. Were that the case, then the entire concept of a
> "neutral" would have no meaning. In HV power supplies which have a B+ and a
> neutral current return, one always anchors the neutral line with a resistor
> (100 ohms typical) to chassis ground. This is done to keep the B+ from
> soaring uncontrollably. The same reasoning applies to an AC power
> distribution system. I DONT KNOW ABOUT THE INSIDE OF AMPLIFIERS, BUT I DO
> KNOW THAT THERE IS NO DEPENDABLE CONTINUITY VIA OHM METER FROM THE NEUTRAL TO
> EARTH GROUND ON MY WALL SOCKETS. FACT. AND, YES I DID BURN UP ONE METER.
> 73,
> Jim W8ZR
>
> > -----Excerpt from Original Message-----
> > > > about 80% of Thailand buildings have TWO holes in the 220VAC wall
> sockets
> > > and ONLY TWO HOLES. One side is definitely hot and the other side is
> > > definitely neutral. The pin sockets, the holes, are not marked and not
> > > keyed in any way. There is NO GROUND present by any means...no wire
> > > ground, no BX cable nor conduit.
> >
>
> > 1) Is the receptacle keyed in any way to ensure proper hot and neutral
> with
> > mating plug connections?; MOST ALL OF MY MESSAGES TO AMPS@ SAID CLEARLY...
> > NO KEY, NO KEY, NO KEY. NO MARK ABOUT WHICH IS HOT.
> > 2) Is the neutral absolutely floating above all grounded and grounding
> > conductors (e.g, a water pipe or water-fed room radiator)? That of course
> > assumes piping is even grounded in Thailand. Or, is neutral simply a
> > floating return for the hot (which in reality would make it another hot
> > conductor). Even though the receptacle has no ground reference, is
> neutral
> > grounded/earthed at the service entrance or at some point upstream from
> the
> > utility provider? WE HAVE ALL PLASTIC WATER PIPES AND THAILAND DOES NOT
> > NEED HEAT RADIATORS.YES, THE NEUTRAL IS JUST A FLOATING RETURN FOR THE HOT.
> > THAT IS WHY I AM ASKING ALL THIS RE AMPS PLUGGED INTO THIS SYSTEM.NEUTRAL
> > HAS NO CONNECTION TO EARTH GROUND, NONE, NONE NONE. AS I SAID BEFORE,
> > NONE. COME ON, BRIGHT GUYS, READ MY MESSAGES AND HELP ME, 73, CHARLY
>
>
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