Neutral/Earth Fault - Page 2 - Electricians Forum | Electrical Forum | An electrical forum for electricians in the UK

Reload · 30-09-2008

Great thanks everyone - I will investigate as you [all] described. The circuit is a radial socket cct (not installed by myself). I noticed that one of the socket circuits was not on the RCD side of the board - I tried it in the RCD side and, probably, found why the person who changed the consumer (apparently 3 years ago) had not included this cct on the RCD side; the RCD kept tripping. So, I had a look in all the sockets (metal clad 2G type) but could not find anything obvious so I guess the fault must lie within the interconnections or from the board to the first socket (of course its all hidden underfloors, walls etc along with any JBs). With this type of issue what are the possible consequences, live metalwork; MCBs not tripping in the specified times; nuisance tripping; fire hazard?

Thanks

sparkyork · 30-09-2008

its also not unheard of for sockets to be faulty either, give them an ins res test as well

Reload · 30-09-2008

OK will do - yes you are right I shouldnt assume anything......

wattsup · 01-10-2008

It's not bound to be a fault, any equipment plugged in may be neutral earthed anyhow, transformers on ch systems, some elv lighting systems, door bell spur off ring circuit, door entry, cctv, elv fans in bathrooms, burglar alarm.. loads of external stuff will seem earth neutral fault, old trannies trip rcd's -

01-10-2008

Quote:

Originally Posted by wattsup

It's not bound to be a fault, any equipment plugged in may be neutral earthed anyhow, transformers on ch systems, some elv lighting systems, door bell spur off ring circuit, door entry, cctv, elv fans in bathrooms, burglar alarm.. loads of external stuff will seem earth neutral fault, old trannies trip rcd's -

what if they are not full trannies and just like the occasional bit of cross dressing?

sorry, couldnt resist it!

wattsup · 02-10-2008

;-)
All trannies suffer from surge current, one way or another

wayne · 02-10-2008

Quote:

Originally Posted by wattsup

;-)
All trannies suffer from surge current, one way or another

but it's a mistake to think they're AC/DC

hasel5 · 02-10-2008

Just get your tester out and use your Knowledge as as proper spark

Reload · 06-10-2008

Right thanks for the help guys - the last few comments arent particularly helpful (funny though). I'll bear hasel5 comments in mind when I read some of the other questions on the forum and find the garbage that some people call good work.