"David G" notreallyhere@sure wrote in message
. com...
I have been playing around with a Tool Transformer for 110v power
tools.
Using an earth leak tester I found that the earth pin on the 240
side
gave a reading on earth, neutral and live on the 110v side. I assume
this is the centre tapped earth, but am curious to know why this is
so.


--
Regards


David G
(remove r u n)

With earth connected to the centre tap of the 110v side, you only have
55v from either live pin to a potential fault so even if a live wire
is touched the shock will be minimal

AWEM