Surely that can’t be true. If it is how come a bare CPC is allowed in twin and earth?Incorrect. It must be green/yellow throughout its length.
Surely that can’t be true. If it is how come a bare CPC is allowed in twin and earth?Incorrect. It must be green/yellow throughout its length.
That is one reason why it is up to the buyer to commission and pay for surveys including electrical rather than trust one provided by the vendor.Another thought... how do I know the latest sparky is signed up with Elecsa or similar? How do I know he's not buying blank certificates online and issuing these so they look legitimate?
Exactly.Why wouldn't we? After all, we had a certificate showing all was ok, or so we thought.
Another thought... how do I know the latest sparky is signed up with Elecsa or similar? How do I know he's not buying blank certificates online and issuing these so they look legitimate?
Because a single core cable is not the same as the protective conductor core of a multi-core cable.Surely that can’t be true. If it is how come a bare CPC is allowed in twin and earth?
Where does that come from, since I don't think you'll find it in BS7671. All it says specifically about identification of protective conductors by colour is that single-core cables which are G/Y throughout their length cannot be used as anything but protective conductors (i.e. cannot be over-sleeved at ends for use as live conductors).Incorrect. It must be green/yellow throughout its length.
There is also the fact that something other than a wire may be used as a bonding conductor; this does not have to be green and yellow.I am aware of nothing in BS7671 which says a conductor which is used as a protective conductor has to be G'Y throughout it's length
This matches my understanding but I only have 2008 copy of regs and didn't know is it has been changed in recent editions.Where does that come from, since I don't think you'll find it in BS7671. All it says specifically about identification of protective conductors by colour is that single-core cables which are G/Y throughout their length cannot be used as anything but protective conductors (i.e. cannot be over-sleeved at ends for use as live conductors).
I am aware of nothing in BS7671 which says a conductor which is used as a protective conductor has to be G'Y throughout it's length - it would seem that it could be any colour, provided that it was identified (e.g. with G/Y over-sleeving) at it's terminations (per 514.3.2 - which only says that identification throughout the length is "preferable").
Am I missing something>
It hasn't changed in Amd2 of BS76671:2018. I'm still waiting to hear where Risteard got his idea from - perhaps not the UK?This matches my understanding but I only have 2008 copy of regs and didn't know is it has been changed in recent editions.
In commercial situations bare copper bar is not uncommom and sometimes in blocks of flats.
I know there was a lot of confusion about using the earth wire in a multicore for other purposes and I seem to recall some interpreting it as Risteard has stated, I suspect it may be a hangover from that.It hasn't changed in Amd2 of BS76671:2018. I'm still waiting to hear where Risteard got his idea from - perhaps not the UK?
Kind Regards, John
There have, indeed, been quite a lot of misunderstandings, hence discussions, about this - but I can but presume that they have been due to people not bothering to (or not being able to ) read, since the regs are really very simple and very clear about this ...I know there was a lot of confusion about using the earth wire in a multicore for other purposes and I seem to recall some interpreting it as Risteard has stated, I suspect it may be a hangover from that.
... and you wrote:There is also the fact that something other than a wire may be used as a bonding conductor; this does not have to be green and yellow.
the regs actually include;In commercial situations bare copper bar is not uncommom and sometimes in blocks of flats.
... and also ....514.4.6 Bare conductors ... A bare conductor shall be identified, where necessary, by the application of tape, sleeve or disc of the appropriate
colour prescribed in Table 51 or by painting with such a colour.
Both of those do include "where necessary", and I presume that it is generally accepted that it is 'not necessary' for, say, the bare COPC of T+E cable (although G/Y sleeving is very commonly used at terminations, although not necessarily 'for identification'), but, as for the second, although my experience is very limited, I can't say I've seen (m)any lumps of metal with G/Y stripes514.4.2 Protective conductor .................. A bare conductor or busbar used as a protective conductor shall be identified, where necessary, by equal green-and-yellow stripes, each not less than 15 mm and not more than 100 mm wide, close together, either throughout the length of the conductor or in each compartment and unit and at each accessible position
If the installation has already been inspected and tested by them, then yes, you do have to pay for it. What the outcome is doesn't change that - it's a report on the condition of the installation.So, do I now get a 'failed' certificate from my sparky with details of why it's failed, and will it still cost me £160?
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