exporting pme

[digger123]

Hi all this is my first post on here and any help would be great this question is starting to do my head in and Ive looked through loads of previous posts as I know its been covered before. I hope I have given enough information and explained it correctly.
I have a 95mm pme supply to a control panel, which has a back up generator. The generator cabin has a consumer unit (with lights, sockets, heaters all protected by a 30 MA trip and MCBs) which is supplied from the pme fed control panel (exporting pme). The generator casing is earthed via a flat copper bar (40mm x 5mm) which goes under ground. The oil pipes supplying the fuel tank are secured onto this copper bar with metal and are therefore earthed. Should the oil line have a 35mm main earth bond from the pme main earthing terminal. The copper earth bar is not connected to the consumer unit.
As i said any help on this would be great and if i am seeing a problem thats not there please let me know.

 

[Engineer54]

Post up some photos, i want to see what your talking about.

Oh and you don't ''Export'' a PME earth, you are in fact extending the equipotential Zone!!

 

[digger123]

Wish i had a photo

 

[digger123]

This was a part renovation job which is on hold, I think till the next tax year. All our work has been tested but the whole installation is not finished. The copper bar has not been tested therefore i don't know the ZE if it is TT or the R2 if it is as I am now beginning to think traveling under ground through a duct to the incoming pme supply and bolted on to the main earthing terminal which is only about 5 meters away. So really just a hypothetical question?
So two questions now really if this copper bar is attached to the main earthing bar should the generator not still be spiked? 551.4.3.2.1
If the copper bar is TT then should the oil line not be either connected to the main earthing bar via a 35mm earth or the earth to the consumer unit be disconnected and the whole installation in the cabin be TT? 542.1.3.3

 

[Guest55]

anyone starting a thread with the title "exporting pme" without searching the billion or so other similar topics can hardly be suprised if it gets the post trashing train derailing it deserves.
;-)

i'll check in on this thread later tonite when i'm feeling bored and mean.
;-)