Earth-neutral contact trips RCD

[Spark123]

Using a multimeter set to AC isn't going to give you an ohmic value
The impedance between neutral and earth varies depending on the supply type etc, just as does the likelyhood of an RCD tripping on a N-E short regardless of loading on your installation.

 

[matt1e]

between the Earth and the Moon? I would say 0Vac

You might be right then again you can't prove that (unless you have a very long wire on your meter)

Maybe I could run it alongside the same long wire thats supplying the potential difference

neutral is the very reason that earth is considered 0V..but I sort of take your point

No the reason is we need a point of reference, the earth make a good point we can use all over the Earth.

and earth is 0v with reference to what?

on An ac setting?

Any induced voltages will be AC you could also have a DC standing voltage with a AC induced one on top.

read sparks123's post above

(It might just be a big tank of water at the sub-station)
..Eh?

Okay just something I was told once a long time ago but it sort of makes sense if the two are different you would need a resister of some kind between them one that could disapate a large amount of energy a tank of water would do the trick.

sorry makes no sense at all

 

[ban-all-sheds]

and earth is 0v with reference to what?

The moon - do keep up.

 

[matt1e]

and earth is 0v with reference to what?

The moon - do keep up.

 

[Woodendhead]

May be you guys should read more
http://en.wikipedia.org/wiki/Classical_electromagnetism

Start with "lighting" is the atoms in the cloud are at a different potential that of the earth hence it arcs this the very big bang and a bright flash. We have no wire just an imbalance of electrostatic potential.

Then take a leap http://hepg-work.ustc.edu.cn/group/document/Juergen_0430.pdf might not be true but the earth was flat at one point in time.

As for ohmic values what has that actually got to do with the potential difference I was suggesting you measure, the force the drives the current the trips the RCD.

But then you do know when it comes to impedance are we talking a pure resistive load or what you actually have in any circuit RLC thus to measure the effective impedance for 50Hz AC system you would measure it at 50Hz

 

[matt1e]

May be you guys should read more
http://en.wikipedia.org/wiki/Classical_electromagnetism[/QUOTE]

I might as well read "war and peace" It has about as much relevence

Then take a leap http://hepg-work.ustc.edu.cn/group/document/Juergen_0430.pdf might not be true but the earth was flat at one point in time.

so you do understand the meaning of the words "hypothesies" and "Fictive"

As for ohmic values what has that actually got to do with the potential difference I was suggesting you measure, the force the drives the current the trips the RCD.

It was You who mentioned Measuring impedance

I still reckon there is a potential difference of 0Vac between the earth and the moon
I still like to know how you think earth is at 0vac and also neutral is at 0vac if they have no relationship to each other?
can you accept to arguement that they're both at 230v?

we'll forget about the water tank!