But you have to supply every single wiring point and accessory with a CPC. How are you going to acheive this if you've over-sleeved the green and yellow wire to use it for something else?
CPC as live conductor now OK?
- Thread starter ecowarrior
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I don't think everyone understands this, I was re-doing somebodies badgers a**se taped connector block on monday, plan was just to put a chocbox over the connector blocks, but for some reason they'd decided not to continue the cpc
It was only supplying 2 x 0.1m of flex to two 12v tranny's, I still remade it to take the cpc that extra 20cm, because its the right thing to do
Assuming you're registered with some body why not ask them, or do you just pay your money because you have too then take no notice of what they say.
Go on be a devil.
"Question, I'm wiring a room stat in a custards house, is it acceptable to over-sleeve the green and yellow as the switch wire"
No need, its in BS7671
411.3.1.1
A circuit protective conductor shall be run to and terminated at each point in wiring and at each accessory except a lampholder having no exposed-conductive-parts and suspended from such a point.
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Then explain why the NICEIC and all the other bodies say different.
Which one takes your money Iggifer
They don't say different.
Even if they did say different, im gonna go with the IET every day of the week
Can't believe I got suckered into this discussion again.
Can't believe I got suckered into this discussion again.
IET said it's acceptable.
But you have to supply every single wiring point and accessory with a CPC. How are you going to acheive this if you've over-sleeved the green and yellow wire to use it for something else?
I'm not a sparky, which happens to be why I asked the question in the first place, as a result of a thread in the plumbing forum.
IET wrote.
I am required to preface my remarks by saying that I have no authority to interpret the requirements of BS 7671:2008(2011), Requirements for Electrical Installations, however, within that constraint, I hope you will find my comments helpful.
It is my understanding that multicore cables/flexes, may have their green and yellow conductors sleeved (although I feel it should be avoided wherever possible).
Single green and yellow cables (those used in trunking and conduits etc.), should never be over sleeved.
Twin and earth cables should equally never have the CPC sleeved with any colour other than green and yellow.
I hope these comments are useful to you.
Names removed on purpose.
IET wrote.
I am required to preface my remarks by saying that I have no authority to interpret the requirements of BS 7671:2008(2011), Requirements for Electrical Installations, however, within that constraint, I hope you will find my comments helpful.
It is my understanding that multicore cables/flexes, may have their green and yellow conductors sleeved (although I feel it should be avoided wherever possible).
Single green and yellow cables (those used in trunking and conduits etc.), should never be over sleeved.
Twin and earth cables should equally never have the CPC sleeved with any colour other than green and yellow.
I hope these comments are useful to you.
Names removed on purpose.
What was the specific question you asked the IET?
Exact question coppied and pasted.
As a Plumbing and heating consultant I come across an infinate number of properties where the green and yellow insulated core has been oversleeved and used as a switch wire, (normal multicore flex as used in heating controls)
The trade seems to be 50/50 ok or not ok, I have asked the NICEIC and Napit with conflicting replies.
New installations I would say no, but the million already installed is the question.
Your opinion would be appreciated before I loose what little hair I still have.
signed Me.
It is acceptable - but then you've got to find a way of running a CPC. You never ask them whether it's OK to not run a CPC, do you?
Kind Regards, John
Stop trying to worm out of it John.
The original thread, had green and yellow oversleeved switch live to the room stat, which the OP was changing. And very common in every day experience.
IS it acceptable or does the OP need to rewire at a cost of several hundred quid for re-decorating etc, on top of the spark making a 50 quid job into 500quid.
All the experts that you sparks pay good money too say it is.
Nothing about running a cpc or sucking air through front teeth.
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