The Natural Philosopher wrote:
Derek Geldard wrote:
On Thu, 21 Feb 2008 02:54:48 -0800 (PST), terry
wrote:

Any advice appreciated; am presently in a country that 'sort of'
follows UK 230 volt 50 hertz wiring practices. So may be able to
purchase one or two of something and take back to Canada?

Is the 230v supply in Canada 155 - 0 - 115 ?

Our 230v is 230 - 0 - Gnd.

Not 100% sure how well one of our RCDs would work on a 115 - 0 - 115
installation. It might be alright ;-)

DG

Our RCDS dont use, or care, about ground.

What they care about is more current coming in one wire than goes out or
vice versa ;-)

So as long as the lakage to earth is not on average, the same from both
'live'and 'neutral' they should be OK..

There are some that do additional checking involving ground, and
those ones would not work on 115-0-115. Then again they would if
you fed the right one of the incoming live wires to the RCD ground
connection, and the output side had its ground wire rerouted to the
real ground.

RCD sockets cost about £20, and RCD plugs around £7. But I dont
know why the OP doesnt get one back home. Theres no
connection on our RCD skts to allow them to cover other sockets, so
plugs are a far cheaper option. Dont forget to get sockets for the RCD
plugs!

Its also possible to make RCDs - though not worth bothering
unless you really need something specialist, eg a 0.5mA trip or
something.


NT