Lighting circuit

[jamminuk]

Hi all, hope you are well.

I had a job today that baffeld me, am quite new to the trade so maybe someone with more experience would have been able to nail the problem straight away buit here goes:-

Build type - Flat
1 lighting circuit
wired in singles - 2 plate
Half the circuit is working (Hall, toilet, bathroom + Kitchen) the other half is not ( living room, + x2 bedrooms)
There is power at the switches and cieling roses
240V accross live and earth but also accross neutral and earth (alarm bells)
Green gunk found at various places i.e. ceiling roses etc.. Apparently some sort of reaction of copper and plastic insulation + heat

I thought there could have been a broken neautral or something but checking all switches + roses neautral all connected. I need to get a long lead so i can bell them out to confirm continuity, it's just a nightmare trying to figure out how the place has been wired, apart from figuring this out i suppose another way to work around the problem would be to re-wire the faulty part of the circuit, it just does my head in how it was working at some point and then suddenly stops working????

Anyway if anyone has got any ideas as to what the problem could be i'd really like to hear them, thanks again for all your help.

Regards

Ben

 

[stuart569]

are you sure its a neutral and not a switched live?Is it loop at light/ switch or joint box?I presume its not the latter.soubds like youve lost a loop feed at switch or ceiling rose

 

[Knobhead]

You’ve answered 2 of your own questions. Broken neutral (most likely) Long lead for testingThe one you haven’t answered is the one nobody other than yourself can answer, you’re there, and we’re not. But corrosion sounds favourite, it will be at a terminal. Highly unlikely it will be mid run unless some numpty has tucked a joint away somewhere.

 

[jamminuk]

Hi Defo not switch live, these are neutrals in the neutral plate at the ceiling rose, there is power at both switches and roses of the rooms where the lights arn't working, will need further testing....

 

[GLENNSPARK]

Why a long lead if you dont have a wander lead then just go r1 r2 then when/if you confirm the cpc is good just go r2 rn if you suspect the neutral....

 

[jamminuk]

Glennspark - DOh i know i did realise after i sent this. I went there with a more experienced spark today and resolved it. After breaking the circuit down bit by bit and various tests, still not 100% sure why but the green sludge at one of the cieling roses wasn't helping, think that was playing tricks with the neautral, whoever wired it in needs to be shot

 

[mcummins7]

Jamminuk, read my newly posted thread. Similar but not the same!!

Still not sure what the problem was you found with your circuit!!!!!!!!!! Pray tell