It does. I think TTC probably misunderstood what you wrote.
Agreed. However, although they don't need to 'respond to your notification' initially, I wouldn't have thought that they could refuse to issue a Completion Certificate unless they had evidence (only available from I&T) of some non-compliance, could they?
I believe this could be tested with a decent multimeter? I've got a TN-S system for what it's worth
My sympathy for them is also ZERO.
... which makes total sense, doesn't it?
I've never heard of that one, doubt that they have the authority to impose such a requirement and can't see how they could attempt to 'enforce' it.
You can measure R1+R2 with a low-ohms meter (you really need a resolution of around 0.01Ω), but regular multimeters are not necessarily capable of that. However, more to the point, you can't measure total loop impedance (ii.e. Zs, including Ze as well as R1+R2) with a multimeter, and you need to determine Zs to confirm that the circuit's overcurrent protection is satisfactory. In the absence of a proper loop iompedance tester, you would have to 'guess' the value of Ze.
As I understand it, it doesn't say it directly, but it says
You also need a relatively high test current. I've tried to measure tiny resistances with an expensive bench meter and while it had plenty of resolution due to the large number of digits, it just did not produce stable results.
Indeed so - and I would hope that we all know that. However, what we are talking about is who does the testing -and if one is paying £££ to utilise the "LABC route" for notification, then a significant part of that £££ is for the LABC to undertake, or at least pay for someone to undertake, the I&T, isn't it?
Indeed it does - but that's true of all electrical work, whether minor or major, notifiable or not, and regardless who does it - and is the thing that we have to recognise the great majority of electrical DIYers cannot do (fully), because they will rarely have the equipment required for all the testing. However, if we felt strongly about that 'deficiency', all we could so would be to say that very little DIY electrical work should be done/'allowed' (and that forums such as this one should therefore be shut down).
It varies a lot between LAs. The current one for where I live is:
).That's probably theoretically true but, for what its worth, my Fluke 1362 only uses about 4V for low resistance measurements - presumably no more than can/could be achieved by a bench meter or a portable DVM which uses a 9V battery. Furthermore, I would expect that any error in measure very small resistances (due to low current or whatever) are very likely to be in what is usually the 'safe' direction (giving readings which are too high).
I can't disagree with that, although one can do a fair bit with just a decent DVM.
Multimeters in resistance mode normally act as current sources. I just checked a couple of meters that were to hand and they both used currents of around 1.5mA in their most sensitive resistance mode. I don't think expensive meters are substantially different in this regard but i don't have one to hand right now to check. That means 1 ohm is 1.5 millivolt, 0.1 ohm is 150 microvolts and 0.01 ohms is 15 microvolts.
My bitter experience is that contacts don't behave like resistors.
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/ge...lanningbuildingcontrol/BC Fees April 2023.pdf
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local
