Sorry for my ignorance what is R17 ?
Plumbers. Bless them.
- Thread starter RF Lighting
- Start date
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A ray of sanity at last - thanks.
You cant make a silk purse out of a pigs ear!
You cant make a silk purse out of a pigs ear!
I wasn't suggesting you would come across that actually rewiring the zone valve - but you will probably see at least one of the two options in the 10 way box - especially if its a Y plan?
'Impossible' is probably not the right word, but if immediate remedy would be very difficult, I have already suggested that the pragmatic approach might be to accept an oversleeved G/Y-insulated core (of flex) as a live conductor (and the consequential absence of a CPC in the cable) - if that is what is being suggested. However, that only deals with part (a) of ecowarrior's question. As for (b), if this is what is being suggested, I think I would personally draw the line short of having anything to do with the ongoing use of a bare CPC as a live conductor (even if sleeved at its ends) - except, conceivably, as a genuinely very temporary situation before I remedied the unsatisfactory situation in the very near future. It would, however, virtually always be possible to provide a 'temporary' surface-mounted proper cable (even if involving a circuitous route), 'to get the heating back on', until such a time as 'neat' proper wiring could be installed.
Having said all that, I'm a bit confused, because don't zone valves need an earth connection (hence a CPC used as a CPC)?
Kind Regards, John
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sorry John I didnt explain my self very well. hopefully my previous post helped! Many a 10 way box has reds connected to cpc's!
In all fairness to you that is an excellent answer. Weather the custartd would allow u to do it - - - but if u mentioned it as offered on the invoice to cover your bum - Job done.
In all fairness to you that is an excellent answer. Weather the custartd would allow u to do it - - - but if u mentioned it as offered on the invoice to cover your bum - Job done.
Further to the (I am sure correct) comment about all cables must have a cpc even if they are intended for use with double insulated kit. How far does this apply to heating controls?
If fitting a WiFi stat receiver (0v or 230) I currently use 4 core ( all black) flexi and sleeve the L&N brn & Blu and the other two red. ( or unsleeved if ELV) The Rx box does not claim double insulation – but nothing needs an earth. Are u interpreting the regs to say this should still have a cpc in it?
If fitting a WiFi stat receiver (0v or 230) I currently use 4 core ( all black) flexi and sleeve the L&N brn & Blu and the other two red. ( or unsleeved if ELV) The Rx box does not claim double insulation – but nothing needs an earth. Are u interpreting the regs to say this should still have a cpc in it?
Yes, that was what I meant in my slightly sarcastic (me?) comment about swapping it for the conductor which was being used for the cpc.
I don't think there's much scope for interpretation. As has been explained, the regs explicitly require all cables to have a CPC (even if an earth is not currently required by whatever is connected to it), and there is no exception made for heating control cables. It sounds as if you probably should be using 5-core, not 4-core.
Kind Regards, John
Ah, I did rather wonder what you were getting at with that comment - maybe I should have read your post before opening the bottle
Kind Regards, John
Yep.
Equally.
I do not see any distinction between heating controls and a light switch.
If all the control wires radiate from the wiring box there will be an earth connection readily available.
That is why I was having difficulty determining where the situation would occur, thinking only of added accessories requiring more terminations than the original.
Unfortunately, from your later post it would, I'm afraid, appear that you are actually installing the wiring incorrectly.
Yes, but why does it not?
Why would you not use 5 core?
A water regulation I think.
If I ever trip over thin sheathed 5 x .5 c able I may well. From a practical point the 5 core .75 is so big in diameter to not clamp into many new control boxes.
The Rx unit is rarely more than 12" from the boiler so I recon sleeping dogs r gonna lie on that one.
As to a need for live flowing thru bare cpc -- old boiler with P live & S/Live from upstairs. (red blue yell & cpc) Had new R17 board recently fitted. New boiler needs pump over run, so Live down on the Red, N down on the blue, S/l down on the bare cpc & boiler O/run up on the yellow. Earth for the boiler comes via the main bond
or not at all if its all plastic
Ooooh. That's not good.Earth for the boiler comes via the main bond
Is that why boiler commissioners insist on (cross) bonding all the pipes?
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