Who can install a PME system?

[dook]

Evening all,

I was talking to a colleague today who was saying that if he couldn't get a good enough Ze reading from a TT system he would convert it to a PME. Can he do this?? Sorry again if this is a really basic question but I for some reason thought this was down to the supplier eg EDF

Cheers

 

[telectrix]

you are right. only the supplier can provide PME

 

[sjm]

Absolutely right only the Distribution Network Owner can provide a PME connection. What your colleague is suggesting is illegal and potentially dangerous.

 

[mwm]

Did your colleague mean to say he would APPLY to have it changed to PME?

 

[sjm]

Good point mwm.
I would usually reccommend changing from TT to PME if the DNO can provide it, finding out only takes a phone call after all. Obviously the DNO will charge to provide the connection.

 

[nickblake]

Yep its down to the supplier , i would investigate why you cant get a good reading on TT maximum is 200 ohms unless you are on a very dry area or sandy change you earth method or add say a earth tape or plate try additional Rods

 

[dook]

Did your colleague mean to say he would APPLY to have it changed to PME?

Not sure, the way he was talking insinuated he would do it himself???

 

[nickblake]

No i wouldnt recomend it its a criminal offence to interfear with the supply cut outs could end up in the smelly stuff

 

[dook]

I'll question him further when I see him next. I may well have misinterpereted him. Thanks everyone though for confirming this for me!

 

[GrannySmiff]

are you sure he didnt say if the PME ze was not great he would put in a TT to accompany it I believe this is acceptable.

 

[DurhamSparky]

Yep its down to the supplier , i would investigate why you cant get a good reading on TT maximum is 200 ohms unless you are on a very dry area or sandy change you earth method or add say a earth tape or plate try additional Rods

unless your NIC then its 100

 

[sjm]

100 ohms is only their reccommendation, it's not a requirement, they haven't rewritten the BRB.

 

[nickblake]

are you sure he didnt say if the PME ze was not great he would put in a TT to accompany it I believe this is acceptable.

the max Ze for a TNCS installation is 0.35 if you get readings higher than that then you should contact the DNO , to investigate this as it could be a fault on the supply ,

 

[DurhamSparky]

100 ohms is only their reccommendation, it's not a requirement, they haven't rewritten the BRB.

they think they above it some times!!

 

[nickblake]

funny you should say that ,, im sorry but if the regs say 200 then 200 it is , if the NIC want 100 then thats up to them as i work by what the regs say and not the nic ..durham im not having a go mate