dodgy ring final

[pablo4321]

Hi need some advice, changed a db today everything was fine until testing ring final,there was no continuity on r1 r2 rn so no ring now but the 1 leg is supplying power to all the sockets in the house so basically a radial, it was on a 30 amp old fuse so changed to a 20 amp mcb did a i/r test which showing 0.00 on all conductors this on the rcd side trips also checked R1/R2 no continuity did a wander lead test from this leg on the earth at db disconnected to a couple sockets no continuity to earth but when i touched the neutral there was, any ideas what is going on regards paul

 

[ChrisElectrical88]

Another person learning the hard way to get some testing in before changing a board.

 

[Farmelectrics]

Did you do tests before you changed db

 

[pablo4321]

no now i know i should have but customers was told any faults would be extra

 

[alanl]

Bad / crossed connection somewhere.
Or a nail / screw through a cable.

 

[pablo4321]

thanks alanl going back tomorrow to have a look just put sockets on non rcd for tonight as was getting late

 

[ChrisElectrical88]

I hope you got an agreed price for fault finding in writing. Always handy doing a bit of testing first especially if adding an RCD into the mix!

 

[Farmelectrics]

Always worth an hour of your own time doing pre tests saves loads of headaches later

 

[ChrisElectrical88]

Did know I had a parrot ;-) lol

 

[alanl]

Unbelieveable. You've got an earth fault, and then leave socket outlets live?
Read 411.3.3, and get back there asap to find the fault.