Checking a borrowed neutral

[loz]

changing a fuse board today, house wired in the 60s with the landing light on the ground floor lighting circuit.
Tested at 250v ins res between the neutral of the 1st floor lights and the neutral of the ground floor lights. Result was 0.04meg ohm. Flick switch for landing light and the reading jumps to >200meg ohm.

Am I right in my thinking that this is a borrowed neutral?
In my head I can see the test voltage going up the upstairs lighting neutral, through athe landing lamp, down the live through a lamp one the ground floor circuit then returning back down the ground floor neutral

 

[loz]

If you get zero Meg with one neutral out and the other still connected but this clears with them both out this almost certainly means crossed neutrals.

What is this testing between @westward10 I have attached a drawing of the circuit and shown how believe I am getting the results I am highlighted in pink

View attachment 35390

View attachment 35391

 

[loz]

So who is going to be notifying this CU change to the LABC?

The niceic company I work for, why are you trying to turn this into a witch hunt?
If you look at my profile you will see I've been registered on this forum for 5 or 6 years, maybe not as an active poster but diy ers don't tend to hang around for that long do they

 

[PEG]

Yes there is, he has to be a member of a scheme, or of a company who is, in order to undertake work that has to be LEGALLY done in compliance with the building regulations. Doesn't sound like he is, to me??

Sorry fella,but that statement is wrong,just plain incorrect.
You should qualify why,he has to be a member of any scheme,to undertake what he has mentioned in the previous posts to my quote.

 

[Des 56]

OK, if you are going to be pedantic, the LABC could have been asked to come out and check it. Do you think this is the case?
I am not being pedantic simply stating that scam membership is a personal or business decision,non membership may be a reasonable route for his own convenience,its certainly not a segregation of skill set by being a club member
His procedure for complying with building regs, if it is one or the other is none of my business
His skill set and competence to do the job is not our concern either

I always have been underwhelmed by the system that exists regards domestic electrics and regard it as little more than a unnecessary cost to the electrician and of the customer for little or no benefit in regards safety or standards

 

[PEG]

OK, if we are going to be pedantic, he doesn't. He could get the customer to notify the LABC and get them out to check it. Or, as a member of a registered scheme, he could either do it himself or through his qualified supervisor. Either way it has to be done LEGALLY. Do you really think it's going to happen in this case? P******s me off when I see the rubbish that gets passed off by "installers" who don't have a b*****y clue and have to resort to forums to sort out SIMPLE problems that the customer is paying a so called PRO to undertake.

Hi bud,I am not being pedantic. I am simply stating an accurate fact.

That is,that no legal obligation was implied or required,for what had been discussed in the thread,up to my post.

Whether one revers scheme memberships,despises them or otherwise,there are a huge raft of jobs,tasks and duties,that are NOT legally required,or even shadowed by statute.

Membership of one does not guarantee diddly.
Not being a member,is also,no proof of anything.

I have seen a myriad of scandalous,dangerous,poor beyond belief jobs,performed by schemed up super blaggers.

I have similarly viewed excellent,indeed beautiful work,from folk who have never sat an industry assessment.

I sense that your frustration,may be with the system itself,and i readily share those thoughts.

Try contacting your current scheme provider,in regard to chasing,legally,any person you find having done work un-schemed,or schemed and wrong...i can assure you they will not be turning up the next morning with a judge and CSI team

 

[westward10]

Sorry Loz had to stack some zeds, your drawing would seem to be correct.

 

[hightower]

Hi @loz - sorry to see this has gone off-topic so quickly, but I'm siding with @westward10 on this, your drawing seems to be correct. Lamps in and switches on, you'd get some sort of short neutral to neutral on a borrowed neutral. Flick the switch off and retest and it'll come up clear.

 

[Marvo]

Closed for now, we'll deal with it later.

 

[GMES]

Back open again after a cleanup, please let's keep it on track from now on or it will be closed for good.

 

[GMES]

Sorry Westy, try now

 

[GMES]

@westward10 can you reply now mate.

 

[hightower]

@GMES why was my post deleted?

 

[GMES]

@hightower, your comments were removed because the latter part of the post was reported for the swearing and that it was seen as argumentative, so it was removed as part of the cleanup mate, also Sparks is now banned for a week for his comments so let's move on and and get the thread back to where it started.
Cheers.

 

[hightower]

@hightower, your comments were removed because the latter part of the post was reported for the swearing and that it was seen as argumentative, so it was removed as part of the cleanup mate, also Sparks is now banned for a week for his comments so let's move on and and get the thread back to where it started.
Cheers.

I appreciate that but I first made comment in regards to the original question - thought it could have just been edited to take the 'not so good stuff' out. Oh well.

 

[GMES]

Hi @loz - sorry to see this has gone off-topic so quickly, but I'm siding with @westward10 on this, your drawing seems to be correct. Lamps in and switches on, you'd get some sort of short neutral to neutral on a borrowed neutral. Flick the switch off and retest and it'll come up clear.

Is that ok ya Drama queen