know there are other questions on here abt shared neutral but they dont seem to answer my question. i have recently added sockets to an upstairs ring in a terraced house.
the kitchen ring has an rcbo,
i fitted the same to the other ring but as soon as you switch on the other rcbo trips.
will the shared neutral be between the ring circuits or could it be on any of the other circuits, i.e. lights, cooker, waterheater. If so whats the best way to find it?
I just need to get my head around the circuit arrangement here Keith?
Are you saying:
Existing Kitchen ring supplied via RCBO has been working OK no trips.
Whilst modifying the upstairs ring you have now fitted an RCBO onto the upstairs ring as well.
When you switch on the upstairs ring the Kitchen RCBO trips
but the upstairs RCBO stays on?
We are we definitely talking of RCBO's not RCD's?
Or have I got me pants on back to-front again at the moment? :Blushing
Few other thoughts and questions re extending the upstairs ring..
Did you actually add new sockets by continuing the ring circuit or are they branched as spurs off the ring?
I presume you tested the existing ring before you extended it?
i.e.
what were the r1, r2, rn end to end readings?
what were the insulation resistance test readings?
A straight neutral to neutral joint between the two circuits would have prevented the Kitchen RCBO from setting ON in the first place IMHO. :|
If the kitchen RCBO only trips when the upstairs is energised that would imply power flowing from the upstairs is making its way back via the downstairs.
e.g. A load connected with Live from upstairs and Neutral from downstairs.
Are the downstairs floors solid, such that the downstairs ring is wired up the downstairs walls through the upstairs floorspace then back down the downstairs walls to the next socket?
Could the wrong cables have been cut and broken into when extending the ring? e.g. 1 upstairs cable and 1 downstairs cable?
:|
cant think of any more at the moment! :|
:coffee
welcome to the forum