Neutral bar

[Estiban]

Hi
What’s the principle .
with a neutral not connected to the neutral bar will be 230v basically a line.
But when neutral is connected to neutral bar there is 0v.
Neutral and earth are connected further on with the same potential but I still don’t understand how the neutral bar and even the earth bar isn’t at 230v ?

 

[ipf]

So, with all this, 'neutral or not' talk, how do we test the RFC continuity of the 'neutral' (r n) on the circuit............. if it isn't connected to anything?
We've got to presume, sometimes.

It's like explaining a N fault (disconnected)

'There's a disconnected cable fault'
' What cable?'
'The blue one'.
'Is that the neutral?'
'No'.
'Well which one is it, then?'
'The one that's disconnected'.
Oh, fair enough, which one have you reconnected to clear the fault?
The neutral, of course'.


There's a hole in my bucket, dear Liza, dear Liza.

 

[loz2754]

So, with all this, 'neutral or not' talk, how do we test the RFC continuity of the 'neutral' (r n) on the circuit............. if it isn't connected to anything?
We've got to presume, sometimes.


View attachment 84642

It's like explaining a N fault (disconnected)

'There's a disconnected cable fault'
' What cable?'
'The blue one'.
'Is that the neutral?'
'No'.
'Well which one is it, then?'
'The one that's disconnected'.
Oh, fair enough, which one have you reconnected to clear the fault?
The neutral, of course'.


There's a hole in my bucket, dear Liza, dear Liza.

Nice. Good argument there.

We're talking about a cable intended to be neutral. Only a severely afflicted pedant would attempt to argue otherwise.?

 

[pc1966]

I think it was Lucian who pointed out a couple of months ago that the fact the N conductor is connected to earth, at some point, is what defines it as "neutral" compared to the line conductor(s).

The common earthing systems such as TN-S, TN-C-S and TT all revolve around how you connect to earth relative to the neutral conductor (separate, common PEN, or via the true Earth). Even IT systems usually have some high impedance means of referencing one conductor to the Earth's potential, for insulation monitoring if nothing else.

Even there, the choice of the Earth as 0V is simply a convention, certainly a reasonable one to justify, but it is still an arbitrary choice of what we mean when we say 0V in an absolute sense, rather than a voltage difference sense.

Mars is a bit for for an "earth rod" to get another opinion on 0V!

 

[snowhead]

I would imagine the O.P is sat in a corner quivering, wishing he'd never come on here and asked the question.

This thread needs deleting with the exception of the O.P and let it start again, without all the arguements over when is a Neutral not a Neutral.

It was a relatively simple question requiring a relatively basic answer.

 

[UNG]

Anyone for a floating neutral

 

[snowhead]

Anyone for a floating neutral

Ah, Yes But, No But, only if it actually exists.
I'm not having one if it's a phantom one.

 

[ipf]

Ah, Yes But, No But, only if it actually exists.
I'm not having one if it's a phantom one.

So much for #24, then. ? ?

 

[Micktw68]

Perfect example of just how argumentative and pedantic electricians are.

 

[DJAndy]

Perfect example of just how argumentative and pedantic electricians are.

No they aren't