Charles, are you willing to risk your safety, or your friends's safety on
an answer you get from an internet group? Of course not! We can't know what
danger is lurking inside the amplifier in question.
The only safe choice is doing your own testing and, if necessary, rewiring
the amplifier primary circuit to make sure it is completely above chassis
ground.
The three wire outlet strips you mention are likely used mostly as a
convenient method of connecting three wire devices into a two wire outlet.
Happy hunting,
Gerald K5GW
In a message dated 10/14/2013 8:17:01 P.M. Central Daylight Time,
k4vud@hotmail.com writes:
Sorry to belabor this some, but if we read 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. Does it
matter?
Please comment if this above statement is true or false. Thanks.
Note that some Ameritron amplifiers fuse only one side of the incoming
220VAC.
Clearly u guys have never been to many places in the world. YES YES YES
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. You can NOT obtain 110VAC by splitting the 220VAC with one
side to the hot and one side to ground because the voltage between the
pins is 220VAC and the voltage between the hot pin and earth ground is 220VAC.
Neutral pin to earth ground is about 8VAC but that varies from location
to location.
Please read my exacting language carefully. Thank you very much.
73
Charles Harpole, HS0ZCW
k4vud@hotmail.com
P.S. An extra fun note is that the "outlet strips" sold in Thailand have
holes in the sockets for a ground pin, but the strip has only two wires from
the strip to the plug for the wall. Further, the type of strips sold here
for spike protection and other ground related functions (RFI killing,
etc.) do have a three wire plug, but they plug into a two wire socket with no
ground. Makes me wonder is there is any protection function of these three
wire "outlet strips."
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