Sleeved earthwire... again
- Thread starter SUNRAY
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Recently prohibited. Can't remember exactly where.
514.4.2
Not permitted unless for a PEN conductor, which it won't be in any normal circuit wiring.
Not permitted unless for a PEN conductor, which it won't be in any normal circuit wiring.
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What Flameport says goes....
I would never use a G/Y cable for anything other than it's intended purpose.
No matter what anyone else says, bodging it with an oversleeve or a bit of tape is just not right.
Do it right first time, if your short of cores then get another cable.
I would never use a G/Y cable for anything other than it's intended purpose.
No matter what anyone else says, bodging it with an oversleeve or a bit of tape is just not right.
Do it right first time, if your short of cores then get another cable.
How many photos cells have an earth wire sleeved brown out there? Loads I'd say...
Would use 4 core these days and not use the earth, strange ay
Would use 4 core these days and not use the earth, strange ay
I keep 3 core flex on the van that has brown black and blue cores for photocells.
... and you would undoubtedly be right, but not just photocells - also timer fans, PIRs, wall stats and various other things. Quite common, but never very 'nice' and no longer even 'allowed' by BS7671
It is a little ironic, but the 'earth' often will be needed (to comply with BS7671), even if it's supplying something Class II. Were not the case, the ideal would be for cables to come with one of the cores a 'neutral' colour (e.g. white), so that it could be sleeved G/Y when a CPC was needed, but sleeved brown or blue if no CPC were needed but a S/L was!
A bit like I just suggested (but white!). However, as I implied, what about the theoretical BS7671 requirement for a CPC to be run to the photocell?
The flex will be a short section from a connection point to the photocell, the cpc will be available there.
My apologies, I knew it would be this can of worms.
I'm happy with the flex between the connexion point and device not containing an earth wire if not required, in fact I'd rather expect the 'fixed' flex on a pir device to not include an earth wire (and is my experience is black or red for 3rd wire [blue or yellow in old money]).
Just as I'd expect 2 core flex on other classll devices such as power tools.
I'm happy with the flex between the connexion point and device not containing an earth wire if not required, in fact I'd rather expect the 'fixed' flex on a pir device to not include an earth wire (and is my experience is black or red for 3rd wire [blue or yellow in old money]).
Just as I'd expect 2 core flex on other classll devices such as power tools.
Yes, that's consistent with common sense. However, I suspect that there will be some pedants about who would cite the 'requirement' for a CPC to be run 'to every point' in a circuit (which they would argue includes the photocell itself)
Indeed. I would personally also be very happy with that - but see what I've just written about 'pedants'
Quite so. We've discussed that before, and it's not really clear (at least, not to me) what BS7671 intends should be done in such situations - to run an additional CPC to a piece of equipment that didn't need it would be particularly silly
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