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)

In article ,
David G notreallyhere@sure wrote:
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.

Might make sense if you read the thread before posting the same thing
again.

--
*Oh, what a tangled website we weave when first we practice *

Dave Plowman London SW
To e-mail, change noise into sound.

"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

In article ,
says...

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



Thanks for the reply. I am curious to know why it is done like this

On Sun, 30 Apr 2006 14:05:57 +0100, DG wrote:

|In article ,
says...
|
| 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
|
|
|
|Thanks for the reply. I am curious to know why it is done like this

I kills fewer Builders than other ways.

Builders are often soaking wet, and standing in a puddle so reducing the
voltage between a tool which they may be holding, and may develop a short
to frame, and earth is A Good Thing.
--
Dave Fawthrop dave hyphenologist co uk Google Groups is IME the *worst*
method of accessing usenet. GG subscribers would be well advised get a
newsreader, say Agent, and a newsserver, say news.individual.net. These
will allow them: to see only *new* posts, a killfile, and other goodies.

In article ,
says...
Might make sense if you read the thread before posting the same thing
again.



I apologise for the double posting. My origninal and all replies have
not shown up in my newsreader. Don't what is going wrong. Had to find
the replies through Google Groups. I am using Thunderbird and have never
had problems with it. I found an old copy of Gravity and that picks up
the messages correctly. Don't know what is going wrong. There are no
filters enabled but I do see that other headers are missing.

Anyone any ideas on what is wrong please

Regards

David

DG wrote:
I apologise for the double posting. My origninal and all replies have
not shown up in my newsreader. Don't what is going wrong. Had to find
the replies through Google Groups. I am using Thunderbird and have never
had problems with it. I found an old copy of Gravity and that picks up
the messages correctly. Don't know what is going wrong. There are no
filters enabled but I do see that other headers are missing.

Anyone any ideas on what is wrong please


With Thunderbird, make sure that the View selector is showing 'ALL',
instead of 'UNREAD'?

--
Adrian C

Dave Fawthrop wrote:

I kills fewer Builders than other ways.

Builders are often soaking wet, and standing in a puddle so reducing the
voltage between a tool which they may be holding, and may develop a short
to frame, and earth is A Good Thing.

Thanks

--
Regards


David G
(remove r u n)

Adrian C wrote:

With Thunderbird, make sure that the View selector is showing 'ALL',
instead of 'UNREAD'?


The fault was with my setup - the account was corrupt. When I changed
news served I just changed the name and server of an existing account to
save having to reload all the other groups. Thought it was working ok
until this fault showed up. Having setup a new account it seems ok now.

--
Regards


David G
(remove r u n)