DNO and me

Guest123 · Jan 21, 2009

Hey.

Does anyone elses DNO now provide them with back up TT systems on their PME's??

I didn't know mine did until today when I started testing a big industrial job we have just completed.

The Ze I was getting was 32.3ohms, bearing in mind max is 0.35ohms.

When I had a look inside the service head enclosure, there was one link to the brass earth nut off the neutral terminal which was just hanging there unconnected, and one coming off an unsheathed cable which was drilled through the wall and buried outside which was connected and was what was giving me my earth path

I cant think of any reason for doing this other than as back up in the event of neutral failiure due to cable damage.

As for why they hadn't connected the PME the reply I got was we forgot
ARRGGHH

So going back to my original question has anyone else come across this with their DNO.

Mine is South West Wales.

Cheers.

slocm3105 · Jan 21, 2009

Funnily enough I've found a few installations like this and always wondered what was going on

. Western Power my DNO. I work Somerset and Devon.

Guest123 · Jan 21, 2009

Western Power are mine too. Must be their own little thing, why dont they tell us they're going to do it though?? I was bricking it thinking I had a bad connection somewhere.

slocm3105 · Jan 21, 2009

Indeed, we once had a couple of devon lads come out to replace service head, giving us all the mouth because we pulled the fuse, although it was because the whole thing was melting. H&S reasons we pulled, they nagged us like we were school kids, they replaced service head,we powered up new CU and they had only gone and connected it L-N cross polarity lol!!! Out comes the fuse again to reconnect lol

mrloy99 · Jan 21, 2009

lennytheloon said:
Western Power are mine too. Must be their own little thing, why dont they tell us they're going to do it though?? I was bricking it thinking I had a bad connection somewhere.

cowboy job------some subbies these supply companies use are disasterous..who is doing the check ups on THEM?

AlanDavies · Jan 22, 2009

In reply to slocm3105, I am pretty sure that Scottish Power Manweb give out three day suspensions to their staff for the first cross polarity and a p45 for the second.