Search results

All DNOs will give you a Ze of 0.8 Ohms, and as the measured Ze (yesterday) is 0.4 Ohms, I'm quite happy that EDF can "supply" me safely with my "load requirements" with or without diversity... yea, that sort of "fault" would be big, I admit I'd wouldn't want to test it... (I've seen swiss...

yea, it could cause a fault "upstream" point taken - what do you suggest? it's all well and good having a 16mm2 cpc, but only a 6mm2 then to to DNO feed, might as well just leave 6 or 8mm2 in place, (the weakest link)..

that's a "nice" pic, is it where you obtain your copper from? !!

I'm glad of that (in "clearing a fault") but I believe that there is not a maximum cpc size allowed, only a minimum, and as recommended was advised to bond at 16mm2, hence the additional... If you think that I should "limit" a PSC due to DNO "limitations" then thats' another matter.. I'll take...

NICE PIC!!

where may it "go bang"? (with RCDs and RCBOs inplace at the CU), at the local DNO distribution site? The PSC is only 0.56 KA, so with the proposed protection it'll only be a few ms before "cut off" - at "my end", the rated DNO feeds are "good" for several 1000s Amps before something *serious*...

it's only 6-8 mm2 (estimated), so the extra 10mm2 will do no harm at all, it's to utilise the Ze (in case of an "issue")

I possibly may assume so (PILC), certainly it's lead.... and this supply feed is certainly "harder" than any metal pipe - ie 15 or 22mm copper, so I've double bonded the incomming DNO feed, it can only help....

me...

nice one. but not.... (I used to work for the CEGB....)

what the extra cpc or the wanda lead?

[/url] yes - this "****" does happen :lol: I've synced 60 MWatts plants to the national grid... If you don't get it *right* then "problems" occur, and believe me if the sync and/or frequency is not exactly right *strange* sounds come from the "genni" hall.....

OK - I'll double it over.. It's a wanda lead...

as in the CU to earthing bar, also the earthing bar to the DNO supply feed - all 16mm2 see the pic... http://www.browse.to.it/bonding.jpg

Ok, to clarify, the Main protective equipotential bonding is 2 times 10mm2. The earthing conductor is 16mm2 . the circuit protective conductor is also 16mm2. http://www.browse.to.it/bonding.jpg

- it's a constructive question...

Ok, all points noted, in what way is my use not going to be compliant?

No u didn't mention MPEBs... the main bonding is 16mm2 with gas and water at 10mm2 (each) so are u saying that if I use 4mm2 unprotected cpcs then i'd need x 4 (for each fitting) ? as well as myself adding additional bonding in the loft to the water riser, so let's get this clear, bonding to...