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Live - Neutral reverse from plug in tester

Former Community Member
Former Community Member

Hi, being retired for 2 years i was in trade as domestic electrcian for 10 years then commercail for next 40 years. So have high level od experience in field, yet never experienced the below unrational fault.

Really baffling me now (and an  independant competant electrican contractor) is a recent problem where i found using Martindale plug in tester (also using  independant contractors KEW plug in tester) that on a ring circuit somewhare in its middle 2 outlets read L-N reverse.

Yet taking off the outlets, the cables are connected correctly and live tested live in its correct position so Plug top fuse was correctly protecting appliances. This is on a recently extended ring circuit for room extension. I have read other blogs where they say the earth could be live or at least have a voltage presence, or that the earth CPC in fact could be floating so having volts induced to it.  Both scary thoughts.   

Any one had same issue please and what was found to then correct fault. 

I have yet to do a local earth test of the cpc at the two outlets and check the consumer unit earth connection to the main incoming supply.  Also all other outlets in house test correctly so assume main earth connection is not a problem and the RCD as main isolator passes its tests,

Parents
  • Former Community Member
    0 Former Community Member

    Finally sorted fault. found on the ring one socket had very loose cpc wires so not forming the ring it does not help when electricians don't twist them together, if they did but not terminated at least the ring would e maintained to other outlets.  Then at i expect an adjoining socket but on other side of room one of the cpc ring earths was left at back of box, looks like it was never put into the terminal, again if they were twisted together first then its unlikely to be forgotten.

    In my 50 years of sparking and notably more in the past 15 years its my  educated guess from what I've found that around 80% of houses have electrical faults, that is shocking (not a pun). For all the regs etc in the UK things are getting worse and not better. The Industry needs to change dramatically to rectify this. The perceived protection from having Part P or even 16th;17th or even 18th regulations has proven to be useless in 80% of works i have experienced.    I think the IEE as it was, the government and through them councils have let the general population down very badly.  It may be said you cant go back to the old ways but this Anew way could be costing Lives, mostly children who can be inquisitive. Relying on modern RCD protection is Ok as long as earths and polarities are checked.   Even folks upgrading outlets or accessories need to do do a final plug in socket tester in case cables are left wronly or not connected as single core cables can break when being pushed back into box.

    I hope the above gets to ears that care for our trade/profession. That it may help others understand why certain types of faults are detected and fixed.

Reply
  • Former Community Member
    0 Former Community Member

    Finally sorted fault. found on the ring one socket had very loose cpc wires so not forming the ring it does not help when electricians don't twist them together, if they did but not terminated at least the ring would e maintained to other outlets.  Then at i expect an adjoining socket but on other side of room one of the cpc ring earths was left at back of box, looks like it was never put into the terminal, again if they were twisted together first then its unlikely to be forgotten.

    In my 50 years of sparking and notably more in the past 15 years its my  educated guess from what I've found that around 80% of houses have electrical faults, that is shocking (not a pun). For all the regs etc in the UK things are getting worse and not better. The Industry needs to change dramatically to rectify this. The perceived protection from having Part P or even 16th;17th or even 18th regulations has proven to be useless in 80% of works i have experienced.    I think the IEE as it was, the government and through them councils have let the general population down very badly.  It may be said you cant go back to the old ways but this Anew way could be costing Lives, mostly children who can be inquisitive. Relying on modern RCD protection is Ok as long as earths and polarities are checked.   Even folks upgrading outlets or accessories need to do do a final plug in socket tester in case cables are left wronly or not connected as single core cables can break when being pushed back into box.

    I hope the above gets to ears that care for our trade/profession. That it may help others understand why certain types of faults are detected and fixed.

Children
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