[Amps] More on two pin 220vac

[Paul Christensen]

> 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.

When you state that one pin is neutral and at the same time state there's no 
marking on which pin is neutral, that leads me to ask a couple questions 
about electrical distribution In Thailand:

1) Is the receptacle keyed in any way to ensure proper hot and neutral with 
mating plug connections?;
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?

> Mr.  Parascondola's first message about the presence of voltage inside 
> some Ameritron amplifiers, he seemed to say that it did matter which side 
> of the hot and neutral of the two-wire supply 220ACV was connected to the 
> amplifier AC input.

Specifically, what Ameritron models are affected by this as I would like to 
study the schematic(s).

Paul, W9AC