On Wed, 21 Jan 2004 11:56:00 -0000, "Christian McArdle"
wrote:

A high current device on A draws some current. A small proportion of the
return current from this goes through the earth fault rather than the
neutral, tripping the RCBO. All well and good, exactly what you want.

Scratch that! I'm talking ********!

It won't take out RCBO B, will it. However, it will still have an
unnecessary earth fault, which could be detected by a 100mA device further
up.

Christian.


This one makes more sense.
I think that's what I said originally!! ;-)


SJW
A.C.S. Ltd.