rcd not tripping

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Do I change at Kings Cross for the Northern Line? ?:|
no..

I'd get on at Russell Square..

down to Holborn..

change for Central line then down to

Tottenham Court Road...

Change again..

& theres your Northern Line???

where were you going?????? :eek: :) :^O :^O:p

 
Sorry for my stupidity steptoe but i am a little confusedBlushingSo is that why an RCD will still work on a light circuit with no CPC? Or will ot fullstop.

Which you need an CPC to do?
as with all the examples Mike, look at my post #7,

leak to earth through the fabric of the building, you dont actually have to have a CPC to have an earth, eg. metal back box sunk in a brick wall.

 
earth loop before testing rcd. earth connection to be confirm first.

 
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