3 Phase earth test

[MarkF]

I don't pretend to understand the 3-phase configuration used in your country.  Here in the states are delta-wye and a delta-delta configurations I captured about 2014 NEC - Transformer Electrical Code.  Maybe it will help understand what you have.

[vk6zgo]

In Australia,the 3 phase house wiring is "Wye" or as commonly said here, "Star" configuration.
The 230v (nominal) supply to the wall power sockets is connected between Neutral & Phase.

The  Phase to Phase voltage is "the square root of 3"(or approx. 1.732) times 230v.
(my calculator has "gone walkies",& I am too lazy to work out the exact value on paper.)

[Towger]

In Australia,the 3 phase house wiring is "Wye" or as commonly said here, "Star" configuration.

So that's were the the phase to phase 220 is coming from, I think most of us assumed it was delta.
Many of the older houses in Dublin city have 3 phase, dating back to when they were first converted from gas lighting 100+ years ago.  Not that common in a more modern house, unless it is huge or you have a particular reason to want it. Electricity is distributed in (most areas) as 3 phase. The conected phase alternating between every few houses along a road. If you want 3 phase you fill up the paperwork and pay cost to connect up the other 2 phases.

[German_EE]

We have three phase here in deepest Germany. The reason for that is the cooker and that's the only three phase connector in the apartment however I also know that the lights are on one phase and the sockets are on another. The incoming cables to the apartment are as thick as my thumb, the incoming cable to the building is thicker than my arm.

Chunky German electrical engineering 

[gildasd]

The neighbours house is exactly 230V.

My house has 229v.
Measured at a plug: phase to ground is 113.5 and 113.8.
But another plug is 227.8 but the phases are 131 and 133 

And there is 50V between the "unconnected" earth and the "unconnected" neutral... WTF?
Also 30V between either of these two "unconnected" wires and my new earth...
There is 50 amp limit, but that's still a shitboat full of energy.

The installation and wiring is from 1954 but the box and the differentials are 10 years old max.
I'll look around for the name of the electrician of the previous owner and report him, this is ridiculous.
"Angrier than this emoticon;  "

I will now switch off the electricity and go cap those faaaackin' wires.

[M. András]

pull everything out of the walls cos thats a whole lot off broken or burnt trough cables in those walls if you measure that insanity, get a wall chaser hilti makes good ones and i guess you can rent them too in your country to cut up the walls for the plastic tubing for the cables you dont need anything more then the chaser and a good industrial vacuum for it then you can use even a srewdriver to break out the the brick from the cut channel

[gildasd]

pull everything out of the walls cos thats a whole lot off broken or burnt trough cables in those walls if you measure that insanity, get a wall chaser hilti makes good ones and i guess you can rent them too in your country to cut up the walls for the plastic tubing for the cables you dont need anything more then the chaser and a good industrial vacuum for it then you can use even a screwdriver to break out the the brick from the cut channel

The old system is disconnected at the room and the fuse box.
Straight lines are drawn with the wiring as per regulation. If I find old wires I rip them out, but I don't go out of my way to find them.
The old PVC tubing is macerated cow excrement in material and disposition, so it's not worth pulling new wires in them.
I'm only concerned in not cutting water pipes with  the 350mm grinder/wall cutter while laughing maniacally.

[M. András]

pull everything out of the walls cos thats a whole lot off broken or burnt trough cables in those walls if you measure that insanity, get a wall chaser hilti makes good ones and i guess you can rent them too in your country to cut up the walls for the plastic tubing for the cables you dont need anything more then the chaser and a good industrial vacuum for it then you can use even a screwdriver to break out the the brick from the cut channel

The old system is disconnected at the room and the fuse box.
Straight lines are drawn with the wiring as per regulation. If I find old wires I rip them out, but I don't go out of my way to find them.
The old PVC tubing is macerated cow excrement in material and disposition, so it's not worth pulling new wires in them.
I'm only concerned in not cutting water pipes with  the 350mm grinder/wall cutter while laughing maniacally.

get a wall scanner or some kind of metal/wire detector that can work over 10cm to find the water pipes.
if those are measured with new wiring from the distribution panel something is oddly wrong still. and i highly doubt you have a split phase system

[gildasd]

pull everything out of the walls cos thats a whole lot off broken or burnt trough cables in those walls if you measure that insanity, get a wall chaser hilti makes good ones and i guess you can rent them too in your country to cut up the walls for the plastic tubing for the cables you dont need anything more then the chaser and a good industrial vacuum for it then you can use even a screwdriver to break out the the brick from the cut channel

The old system is disconnected at the room and the fuse box.
Straight lines are drawn with the wiring as per regulation. If I find old wires I rip them out, but I don't go out of my way to find them.
The old PVC tubing is macerated cow excrement in material and disposition, so it's not worth pulling new wires in them.
I'm only concerned in not cutting water pipes with  the 350mm grinder/wall cutter while laughing maniacally.

get a wall scanner or some kind of metal/wire detector that can work over 10cm to find the water pipes.
if those are measured with new wiring from the distribution panel something is oddly wrong still. and i highly doubt you have a split phase system

The pipes are connected to nothing, no earth, nothing.
I follow the pipes (they are in steel 5cm deep max, a magnet is sufficient) and mark them with a red spray.
 The position of the now wiring is in green.
The old wiring, well, I don't care about the old wiring when I'm sure there is no juice in it.

[Delta]

Your supply is seriously fucked up mate!

From your figures, the first set of measurements indicate a split phase supply on that circuit, but the second set indicate two phases of three phase star connected supply (with the star point earthed).

I can only guess that the distribution network uses some form of high leg delta (high leg star?), but I've only ever heard of the Yanks using such a daft system.

[vk6zgo]

The neighbours house is exactly 230V.

My house has 229v.
Measured at a plug: phase to ground is 113.5 and 113.8.
But another plug is 227.8 but the phases are 131 and 133 

And there is 50V between the "unconnected" earth and the "unconnected" neutral... WTF?
Also 30V between either of these two "unconnected" wires and my new earth...
There is 50 amp limit, but that's still a shitboat full of energy.

The installation and wiring is from 1954 but the box and the differentials are 10 years old max.
I'll look around for the name of the electrician of the previous owner and report him, this is ridiculous.
"Angrier than this emoticon;  "

I will now switch off the electricity and go cap those faaaackin' wires.

If you are measuring at a normal domestic power socket,(what we call a General Purpose Outlet,or "GPO" in Oz),229 volts between the two
"non-Earth" pins is about right for a European system.(you are usually on the low side of "nominal"--we are on the high side).

Remember,those pins of a GPO are not "Phase to Phase"------they are "One Phase & Neutral".
"Phase to Phase" would be around 400v.

It is not common in Domestic situations in Australia to bring 3Ph out to any sockets,it is usually used for stoves,hotwater systems,etc.or to feed two or more runs of GPOs,or light circuits.
I would suggest normal practice in your country would be similar.

It looks like you do not have a connection between Neutral & Earth at your Entry Point
Many of your funny results are because of this,AND the fact your DMM has a 11MegOhm input impedance-------------Google "Phantom Voltages",

,