Splitting a ring into 2 radials

[bhamoggy]

Job all done and tested but existing problem found, see what you think.

(please bear in mind, I'm relatively new to the trade)

Ok, on the c/u from left to right we have 4 x breakers all protected by an rcd on that side.

To the right of the rcd are 2 x breakers not used and another 4 breakers, so 6 breakers in total, not rcd protected.

Replaced the 2 breakers not being used with 2 new ones but once a cable was inserted and energised, the rcd on the left hand side would trip?

How can a breaker, not on the same busbar as an rcd, trip it?

Baffled the crap out of me? Could it be a borrowed neutral somewhere in the house?

 

[ProDave]

......Replaced the 2 breakers not being used with 2 new ones but once a cable was inserted and energised, the rcd on the left hand side would trip?

How can a breaker, not on the same busbar as an rcd, trip it?

Baffled the crap out of me? Could it be a borrowed neutral somewhere in the house?

You have put the neutral for you new circuit into the wrong neutral bar.

So the neutral current to your new load is going through the RCD which is seeing it as an imballance and doing it's job.

Make sure all neutrals for the right hand side, non RCD protected circuits, go into the right hand neutral bar.

 

[OnOff]

Conduit outside?Doc H.

You joke about this but my mates were asked to fit a kitchen in Bexleyheath after the tiler had been in. Other than a light switch there were no wall sockets etc and where you would want them was all tiled. They asked "What about sockets?", to be told "Don't worry about it!". Kitchen fitted they left and had cause to go back a while later. In the kitchen, loads of new sockets with the tiles still pristine. The owner had had his sparky friend run SWA externally! Will try and get a photo.

Thinking about it then...........what about some SWA?

 

[bhamoggy]

You have put the neutral for you new circuit into the wrong neutral bar.So the neutral current to your new load is going through the RCD which is seeing it as an imballance and doing it's job.

Make sure all neutrals for the right hand side, non RCD protected circuits, go into the right hand neutral bar.

thanks, yes I realised what has happen. Still a learning curve for me.

However, those 2 breakers are existing and blank so no need to alter it now. Thanks for help