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So I could run 4mm2 to the loft space, also bond it to the cold water riser, and then re-run with 1.5mm t&e to all the 4 fittings then, but just using the cpc, doesn't sound "green" to me, a waste of energy for extra copper and PVC, but if that's the regs then so-be-it....

good "call" !!

Ok, let's assume a total run of cpc for the 1st floor of 30meters and I've not also bonded to a water pipe etc etc in the loft space, the RCBO is rated at 30ma, type B, the current rating is 6 Amps So at a max of 6 Amps at 50Volts = ~ 8 Ohms (obviously too high to really serve the purpose..)...

- taken all of your advice and after receiving correspondence from my FD she advised me to bond all 1st floor fittings etc with a compliant cpc, and exchange all non compliant class 1 fittings in special locations with current conforming fittings leaving just a couple of (non class 1) fittings...

well that's what I said, no, no, and no.. but perhaps (from your earlier comments) that I'd come to that correct conclusion by incorrect interpretation/application of the regulations etc etc?

thx for the reply RF, what is the correct answer though? - out of interest

he (BAS) asked me a question to possibly "establish" my competancy, I have only responded to his request, - and "nothing" to your comment/quote.

Dear BAS, re:" Ah - so if you took a D63 MCB complying with BS EN 60898, and installed it in a CU complying with BS EN 60439-3 downstream of an RCD complying with BS EN 61008 it would then be OK to connect it to a lighting circuit wired in 1.0mm² cable complying with BS 6004 would it? " I'll...

thx for the inspiration!! I'm really enthused, u sure know how to motivate people (I must put u on my list as something like an HR Director in my new Corporation - I'd get people "knocking" at my door for jobs/positions!!) - all in good humour BAS - have a good evening, (I've got some bedtime...

OK , nearly time to finish my comments for this evening, however the attitude (mine) is a serious and professional one, with many serious and relavent questions, I if thought that" I knew it all" and went ahead with projects/services then I'd admit that I was " an idiot", but that's without...

thx !! I now have the PDF of the BS7671 17th edition, it's in 3 chapters (for the design) I also have 16 chapters (for the testing and inspection...) there are some other chapters (6 chapters marked "explained") I think that I had the necessary info. all of this the time. As I stated...

Well you don't actually know the model... and WYLEX will disagree - take them to court then !!! I can't comment on your comment on The Power Service etc, they appear to be "very competant" and helpful, and if you site them "as a bunch of dangerous buffoons - quote) " then I'd telephone them...

Ok, yes I will get a more recent copy of the regs. it's on the list, I know that the new CCU is compliant ), the 1552 Megger is current (as regarding to standards tests) and that the latest forms specify exactly the tests - and results, and I've spoken to ELECSA, WYLEX, Megger etc etc many...

yes, I've got this 3 times, not sure where exactly where your 131.8 is in this pdf, but an all encompasing document with special safety notices for switches/circuits etc etc, I could make those (print out) in 20 mins (in full colour as required) and place them on every switch / light fitting etc...

thx for the help!

but I wasn't responsible for the design and construction of the wiring, only the change of the CU (and supply feeds) - someone else did this 40 years ago (design & construction) and it allows (the certificate) for departures... I'd only sign off the design and construction to "alteration" ie the...

Ok, so are you stating that because that I know that there is a departure but (I) do not correct this and if there is a future problem then I am legally responsible? Should I then get a solicitor to send a letter to my family stating that the wiring does not meet the regs and that I can correct...

Ok! point taken, I just know it as the fault loop impedance, either high (25 Amps) or no trip 15mA type test or Zs, but I give that to u, the latest forms do state "earth fault loop impedance" to be very precise, but of course a fault loop involves R2 and so the cpc and thus earth, I'm just used...

As I stated I was advised to proceed (if I wished) (after stating the known departures) and took the advice of the senior electrician at the Power Service Organisation that my requests/requirements for this project was "in order" with the stated departures, I just thought that I'd air it in this...