"mick"
Phil Allison wrote:
"mick"

Sorry Dave, but Phil is right on this one.

** And all the others for over 8 years.


The fact that it's an isolating transformer doesn't matter, it's the
fact that it's in an "earthed" metal enclosure (or it should be) and
both plug and socket are wired incorrectly.

** Only the plug needs to be wrong ( N-E reverse) for the LETHAL
scenario to arise.


No.

** FFS wake up dickwad - the topic is the use of an ISO tranny !!!

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Bet the Beeb et alia stopped doing that when they nearly electrocuted the
first guitarist.

1. The most common error in AC plug wiring is Neutral-Earth reverse - the
item works and there is no big problem until you find an AC outlet that has
Active and Neutral reversed.

2. Add a 240:240V iso-transformer that carries the supply ground through to
the outlet and it becomes instantly lethal. Draw it out on paper if you
doubt me.

FYI:

Supply earth goes direct to one side of the amp's AC tranny, then comes the
iso-tranny's 240V winding and back to the amp's chassis. The amp will not
run - but the chassis is 240AC live relative to earth.

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Draw it out *carefully* or try it !!!

****head idiot.



..... Phil