Neutralizing Link

[johnnyjb]

What problems and hazards would you cause if you installed your own PEN conductor into a TT system not that im thinking bout it by the way

(am i right to think TNCS is just like TT but with a link from earth to neutral in the cabinet)

 

[Taylortwocities]

No no no. Think about it TNC-S is termed Permanent Multiple Earthing. Can you imagine why that is?

If you connect your earth to the neutral, then a fault to neutral will cause a shock risk not only in your house but also in other installations connected to the supply.

PME is called that because the supply companies earth the neutral with earth electrodes at many points along the length of the supply cable.

This ensures that the neutral is more or less equal to earth evn in the extreme situation where the neutral leg is broken but the phase is still connected.

 

[RF Lighting]

It is an offence to tamper with DNO equipment for a start....

 

[Taylortwocities]

He's in Ireland, that's the real Europe where you can get away with anything.............

 

[RF Lighting]

Why is this in Electrics UK then?

 

[aptsys]

No no no. Think about it TNC-S is termed Permanent Multiple Earthing. Can you imagine why that is?

Protective Multiple Earthing

 

[Taylortwocities]

Oh yes.... Stella strikes this time on a Friday.

 

[securespark]

TNC-S is termed Protective Multiple Earthing. Can you imagine why that is?

Err, because the PEN conductor is grounded at several points along the way to lessen the likelihood of broken neutrals?

 

[reggie perrin]

It is an offence to tamper with DNO equipment for a start....

I know this often quoted but what is the relevant legislation?

 

[JohnD]

I'm pretty sure it's in the Electricity Act. I think I posted a link to it a while ago. Try a Search.

You usually find it doesn't say quite what people think it says.

edited: start here
//www.diynot.com/forums/viewtopic.php?p=629362#629362

I used to work in the biz.

there are 26 pages.

I have read the whole thing a number of times but don't feel inclined to do it again.

Might be section 31.

 

[reggie perrin]

I think it's an urban legend.

 

[JohnD]

5p on it? I have an idea it is called "interfering" or "tampering" with the seals.

 

[reggie perrin]

I'll up it to 10p - I'm calling your bluff...


edit: sp

 

[JohnD]

5p I said and 5p I meant.

 

[JohnD]

On examination, it seems to refer to interference with meters