Fault has stumped me!!

[Rampantchilli]

Surely when testing for borrowed neutrals you don't test between neutrals? Surely the live of one circuit against neutrals of all other circuits, neutral to neutral shows only interconnection between neutrals

 

[Richard Burns]

Testing between neutrals would work so long as everything is on as there would be a connection through the faulty load and one of the OK loads to give the reading, but from line to another neutral would only be testing through the faulty load so gives a chance for diagnosis.
However if the load is electronic and near infinite resistance it may not show up.

This is my thought:

be interested in feedback.

 

[dazza1981]

Testing between neutrals would work so long as everything is on as there would be a connection through the faulty load and one of the OK loads to give the reading, but from line to another neutral would only be testing through the faulty load so gives a chance for diagnosis.
However if the load is electronic and near infinite resistance it may not show up.


This is my thought:
View attachment 23537
be interested in feedback.

That makes perfect sense to me and the drawing makes it even easier to understand. Thanks mate

 

[telectrix]

nice diagram. very useful post.

 

[mnbs 4x4]

is it possible that the lighting neutrals are crossed at the rcbo's , are the neutrals easily traced back at the board to match the feeds to double check

 

[MDJ]

Water in a photo cell or a light more than likely lol

 

[R G]

I would try and trace with earth leakage clamp meter with an MCB in for now, and trace it through with just that 1 circuit live then liven up other circuits and see what happens with the readings , you could try with lamps in first and all switches off , then try with switches on one at a time , trace it that way ,

 

[londonlec]

Does the circuit definitely need an RCBO...

 

[Plonker 3]

Does the circuit definitely need an RCBO...

Why have you asked this?

 

[Des 56]

Originally Posted by londonlec
Does the circuit definitely need an RCBO...

Why have you asked this?

Because he wants to know if the circuit needs an Rcbo sorry dillb, couldn't resist