Line carrying voltage, neutral no voltage

[Anthony Deakin]

Hi all, I have been trying to work out why all the up stair sockets have voltage coming into the line but none of the neutrals.
The ring is on a 16amp mcb. Any ideas why?


Thank you in advance

 

[westward10]

How and where are you measuring these voltages.

 

[Julie.]

What are you measuring the voltage with? And with respect to what?

 

[Avo Mk8]

That would seem a normal scenario, but not sure I understand. Exactly what are you measuring and what is the issue?
just ignore me - everyone has asked the same thing - give some clarity Anthony ?

 

[Anthony Deakin]

That would seem a normal scenario, but not sure I understand. Exactly what are you measuring and what is the issue?
just ignore me - everyone has asked the same thing - give some clarity Anthony ?

Apologies. the the RCD shares the up and down sockets. When I test the sockets on the Kewtech on the trip Le rcd, insulation etc it shows no voltage. I press test and the RCD trips. GGGrrrrrrrrrrr

 

[westward10]

Picture is a bit blurred, is that a no trip earth fault loop test.

 

[Anthony Deakin]

Picture is a bit blurred, is that a no trip earth fault loop test.

It is yes

 

[westward10]

I'm not au fait with mfts prefer separates so I can only assume it is indicating a poor earth path. The fault loop path is line to earth which the meter is looking for so if the earth is not there it may indicate 0v.

 

[Vortigern]

The clue is in the name of each of them.

 

[Anthony Deakin]

The clue is in the name of each of them.

Can you please enlighten me? Appreciate if you would.

Thank you

 

[DPG]

What voltage measurements do you get L-N, L-E, N-E

 

[Anthony Deakin]

What voltage measurements do you get L-N, L-E, N-E

I get o, its weird

 

[Avo Mk8]

I think DPG meant measuring the voltage directly.

By the way I think you have the L and N leads plugged in the wrong way round on the back of the Kewtech, unless I'm reading the wrong manual ?

 

[DPG]

I get o, its weird

If that's the case then you have no supply, or a faulty meter.

But I suspect you aren't on the voltage measuring range on your MFT.

 

[Avo Mk8]

I think DPG meant measuring the voltage directly.

By the way I think you have the L and N leads plugged in the wrong way round on the back of the Kewtech, unless I'm reading the wrong manual ?

No Sorry, Wrong! - I'm upside-down ??

 

[DefyG]

With respect to earth (Reference point), N-E voltage should be 0v but may carry a few volts.
Whereas, L-N nominally 230v as should L-E

 

[timhoward]

I have a similar Kewtech though mine isn't a 'plus'.
You are right, you should see the Line/Neutral voltage on the screen at that point.
From the manual:


So you are right to raise your eyebrows.
I've just noticed you said ALL upstairs sockets are like this. Are they on their own circuit or same ring as downstairs?
Have you re-proved the tester and test leads are working downstairs or elsewhere since discovering this?
I'd put the MFT down and pick up the 2 pole tester and go back to first principles, L-E and L-N tests at all sockets, maybe check wiring for circuit at CU too. Until you are seeing a normal supply at the sockets there's no point proceeding with loop tests. Logic will eventually prevail...

This is an interesting one, so do report back!

 

[Anthony Deakin]

I have a similar Kewtech though mine isn't a 'plus'.
You are right, you should see the Line/Neutral voltage on the screen at that point.
From the manual:
View attachment 91970

So you are right to raise your eyebrows.
I've just noticed you said ALL upstairs sockets are like this. Are they on their own circuit or same ring as downstairs?
Have you re-proved the tester and test leads are working downstairs or elsewhere since discovering this?
I'd put the MFT down and pick up the 2 pole tester and go back to first principles, L-E and L-N tests at all sockets, maybe check wiring for circuit at CU too. Until you are seeing a normal supply at the sockets there's no point proceeding with loop tests. Logic will eventually prevail...

This is an interesting one, so do report back!

Hi, upstairs sockets are on a different breaker yet share the same RCD. All leads Nulled and yes will try again tomorrow and do and EICR on the fuseboard.

Thank you