Rcbo

[apprentice87]

Thought you said there only was the one RCBO with two circuits connected to it.. from what you have just said it sounds like two RCBO's.. Anyway, do not think you are meant to have more than one circuit for each protective device. I would not anyway!!

john...

 

[Sidewinder]

There cannot be more than 1 circuit if there is only 1 protective device, regardless of the cable runs.

 

[apprentice87]

Anyway, you can speculate all you want, proper testing would have found the fault and saved you a lot of headscratching. You will still have to go and test it all anyway.....

john..

 

[electrotron]

Sorry? There is 2 lighting circuits each on its own rcbo. And I think you can double up on mcb now? I may be wrong. Any way, these are separate.

 

[apprentice87]

Ah, then they are stuck then!!!!!

"There are 2 lighting circuits, both connected to the RCBO"

john....

 

[Murdoch]

Sorry? There is 2 lighting circuits each on its own rcbo. And I think you can double up on mcb now? I may be wrong. Any way, these are separate.

What has your gaffer said or done about this fault?

 

[NozSpark]

What has your gaffer said or done about this fault?

He should have really sacked the lot of them for unsafe working practices

 

[ProDave]

You clearly don't have a clue about testing?

Disconnect it all, do all the correct dead tests, tell us your readings and we might be able to help find your fault.

 

[electrotron]

I do have a clue about testing.

I said we didn't have a megger on site and will do it in the morning. I also said I will split the circuit in half and work from there. I will disconnect all lamp carry out IR tests and then one iv found the fault fix it then r1+r2 test. Followed by Zs.

I will disconnect all n and e From switches carry out testing from each cable until the fault is found

 

[pewter]

headbang

 

[steptoe]

there is a lot to be said for spider lighting when you have a fault 

 

[electrotron]

It's not spider lighting. Just feeds to switch and then switch lives. Only 4 switches per circuit. Won't be hard. Just thought u may be of some help. Other than tell people they can't do it or is stupid. Iv read more posts and most of you seem to just take the p ss out of the poster. Doesn't really help. I won't be coming back on here. Even though you are all so friendly.

 

[apprentice87]

Awww.... Please do come back.... Sorry if we seem a bit strange, you will like us all after a bit!!!! Do your tests and then post the results... Do come back though...

john...

 

[ProDave]

And let this job constantly remind you why you test BEFORE you energise any circuits.

 

[kme]

Why would you consider an earth with 50V to be "proof" of a Neutral to Earth fault?

If I read this right, you have two lighting circuits; ( which I think we`ve confirmed no-one has tested in any way) ; each lighting circuit has its own RCBo.

If you connect either / both of the circuit cpc conductors, the RCBo for one of the circuits trips? The same one each time?

If I`m right about the above; then where do you envisage this "n-e fault" to be?

As said above - we can speculate on exactly what is wrong; but we know nothing at all about it - we weren`t there, remember!

Without useful data, such as test results; or wiring type/system; are the ccts loaded, how are they installed etc - we are not able to magic the answer for you. 

Sorry if that isn`t what you wanted. If you`d prefer to go elsewhere, and see if another site has a (friendly) magician to answer this - thats your prerogative.

 

[SPECIAL LOCATION]

opcorn        :shakehead         bad day explode

From the LIMITED information given..

My guesses are:-

1/ 50V on earth..???? with respect to WHAT..

Open cct CPC - to - Electrical earth.

or

Open cct CPC - to - open cct cable Neutral.

or

Open cct CPC - to - open cct cable Live

or

Open cct CPC - to - Incoming Neutral.

or

Open cct CPC - to - Incoming Live

or.......

or.......

or......etc..

It may be just an induced apparent 50V in an open cct cable not tied down to anything measured with a dodgy meter as you imply that you didn't have proper test equipment to hand?? 

2/ Wrong RCBO apparently tripping...

Could be a borrowed neutral between two light circuits...

i.e power from one circuit live going back down the neutral of another circuit..

rather than a N-E fault ?

3/ It's probably the twin brown 1.5mm...

where it joins the 3core+E in the Wago J/Box under the landing floor..  

(just outside the toilet door)..

BUT..

I may be just guessing on point 3!!!

:C

 

[kme]

opcorn        :shakehead         bad day explode

From the LIMITED information given..

My guesses are:-

1/ 50V on earth..???? with respect to WHAT..

Open cct CPC - to - Electrical earth.

or

Open cct CPC - to - open cct cable Neutral.

or

Open cct CPC - to - open cct cable Live

or

Open cct CPC - to - Incoming Neutral.

or

Open cct CPC - to - Incoming Live

or.......

or.......

or......etc..

It may be just an induced apparent 50V in an open cct cable not tied down to anything measured with a dodgy meter as you imply that you didn't have proper test equipment to hand?? 

2/ Wrong RCBO apparently tripping...

Could be a borrowed neutral between two light circuits...

i.e power from one circuit live going back down the neutral of another circuit..

rather than a N-E fault ?

3/ It's probably the twin brown 1.5mm...

where it joins the 3core+E in the Wago J/Box taped join under the landing floor..  

(just outside the toilet door)..

BUT..

I may be just guessing on point 3!!!

:C

Fixed that for you mate

 

[SPECIAL LOCATION]

I am sure you are correct.. :Salute

 

[Sharpend]

Jeez, he's not very keen to learn!!