what causes earth leakage?

[topquark]

They'll be inventing duality next so they can go both ways at the same time just to confuse us.

 

[telectrix]

the really confusing issue is when the positrons decide to intervene. a traffic jam at the junction would ensue, causing road rage and the release of megajoules of energy, this could result in a massive meltdown of the supply cable and so we could all have the rest of the day in the pub

 

[wade88]

ah but thats where the sub atomic particle police turn up and arrest all the rowdy particles and throw them in a capacity for the night until they find a use for them...

 

[telectrix]

use to be called a cell block, but now it's a custody suite with CCTV cameras in the bogs. wonder what the new name for a cess-pit is now. excrement suite? , poo parlour?

 

[Chr!s]

hi chr!s, care to expand on this?

Hi Pushrod

Well as Tel has already stated, becuae of the PME link the neutral current has a several paths, now dependent upon the CNE/PME impedance and the impedance of the protective conductors to earth, then you will find that some diverted neutral current will flow through the protective conductors.

The diverted neutral currents may be from your installation or even a neighboring installation.

Place a amp clamp around the live conductors at the origin on a TNC-S and see what leakage is present,and what the RCD will see.

Now dependent upon current, place a clamp/leakage clamp around the Earthing conductor and then other protective conductors.

See what you find

 

[topquark]

Oooh, now that's a tease. Are you suggesting that the imbalance in the live/neutral won't be reflected in the main earth for the instalation? That's nothing surprising because of the other extraneous paths, why is this more prevalent with PME? I feel like I'm missing something now

 

[telectrix]

i think the answer lies in a piece of toast. have you noticed, every time you drop a piece of toast, it always lands butter side down.

 

[kung]

650 meg is a great IR reading !

 

[telectrix]

and here was i thinking we'd got nicely off topic.

 

[topquark]

650 meg is a great IR reading !

And how many meters go that high? I suspected it was 650Ohms not MegOhms.

 

[telectrix]

all meters will go that high if you've got a tall pair of steps.

 

[kung]

i think the answer lies in a piece of toast. have you noticed, every time you drop a piece of toast, it always lands butter side down.

If i drop toast it dont even reach the ground before the dog has it !

 

[kung]

And how many meters go that high? I suspected it was 650Ohms not MegOhms.

mine goes to 897 MegOhms but it is 3 Meggers tied together with an elastic band and the probes glued together to split the load !

 

[topquark]

mine goes to 897 MegOhms but it is 3 Meggers tied together with an elastic band and the probes glued together to split the load !

Nurse, don't let that man ever do any design work!

 

[kung]

Yer got the idea patiented

 

[telectrix]

mine goes to 897 MegOhms but it is 3 Meggers tied together with an elastic band and the probes glued together to split the load !

i hope you used super conductive araldite

 

[telectrix]

Nurse, don't let that man ever do any design work!

now then. kung has just come up with a design idea for simultaneous IR testing of 3 phase installations, he's just got to get the probes at the right angle. 120deg. apart.

 

[kung]

Was thinking a 12inch wood screw ! or one of the mrs ear rings ! saves bending !

 

[topquark]

now then. kung has just come up with a design idea for simultaneous IR testing of 3 phase installations, he's just got to get the probes at the right angle. 120deg. apart.

Looks just like a flux capacitor

 

[kung]

Complete with the Don King hair !