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Either mine's plumbed wrong, that diagram is wrong, or I've got a different model, because the cold feed and flow are the other way around on mine..

Excellent, looks bang on. Thanks chaps

Trying to understand my current installation before I make some minor changes. There is a component, sort of like a plumbing junction box, which connects four pipes. Could anyone tell me what this is? In the labelled picture attached: 1: Flow from boiler 2: Onto pump, mid-position valve & rest...

That was certainly my first port of call, but to be honest I must have rang 30 local, registered electricians, and except for one they all either didn't pick up, didn't do domestic work, or weren't available any time soon. The one that did come out was talking about thousands and thousands of...

Fellas, for the sake of preserving an otherwise fruitful thread, please can we leave it and not devolve into semantic arguments.. I will be doing testing before, during, and on completion, but I'm not likely to have access to fully-calibrated, fully-capable testing equipment.. The LABC would...

Think you're getting confused... I haven't heard from the LABC since I started the thread.. don't blame you - we have wondered a bit! I didn't consider second hand, will have a look around..

The LABC will do a full test, but I wouldn't want to pay their inspection fee just for them to come and and find the polarity is wrong on a circuit or something, so I'll be testing what I can myself.

I definitely do care - it's my house and I want the circuits to stay on once I turn them on.. I will be doing testing throughout, and will probably invest a few hundred quid into testing equipment, but something like a multi-function tester would be an unjustifiable expense for me. That will...

Yes 3.8 and 3.9 are the sections that informed me when I initially started this thread. In plain English it states A) you have to notify the LABC before work begins B) the LABC (or their contractor) will do I&T during & after the works. I'm inferring from your other replies that you don't think...

Well whilst they can't reject work beforehand, they do have a right (an obligation, actually) to inspect it during & afterwards and issue enforcement notices if they don't think it's compliant, so they do have some oversight. I assume they didn't have that ability before 2005, because it wasn't...

For what it's worth, the existing CU does already have a 30mA RCD They do... but electrical work is mysteriously absent: https://www.gedling.gov.uk/media/gedlingboroughcouncil/documents/planningbuildingcontrol/BC%20Fees%20April%202023.pdf

My sympathy for them is also ZERO. :LOL:

I believe this could be tested with a decent multimeter? I've got a TN-S system for what it's worth

Thanks.. I thought BS7671 covered testing procedures which included the dead & live tests you've mentioned? I don't know how much sympathy I can muster for my LABC... not only are they simply lying about my right to do this work, but they usually contract out the I&T, and they don't need to do...

Yep, it's completely paradoxical.. makes me doubly certain that the LABC officer I've spoken to either hasn't read Part P, doesn't understand it, or just wants to keep his seat warm.. I think the only BS7671 test I'll be unable to do is the 'insulation resistance' test, though I'm happy to...

Guess I'll fit the CU the night before! I do understand your point, and I plan to test throughout with what equipment I have, though I don't have anything like a Megger so I'll be somewhat dependent on the LABC. That said I'd wager that there are well in excess of a million homes in this country...

If my interpretation of part P is correct, the LABC will do a test according to BS7671, so it should be very much useable if they sign it off.

Please would you quote the section of Approved Document Part P which states that, when using the LABC rather than a Competent Person or Third Party Certification scheme, the installer must inspect and test their installation? I'll save you the time: there isn't one. Yes, I could install a dodgy...

John, thanks very much for the thorough response and finally bringing some sense into this thread. I've been scouting the internet for WEEKS and the number of very confident sounding people who don't seem to have even read part P is astounding. Also, if you're the same J.W. as on YouTube, I'm...

No clue - that's what I was trying to find out when I contacted them!!! Gosh this is an exasperating discussion...