again....sheathing is not classed as insulation....its there to provide a degree of mechanical protection to the insulated cores underneath!!! WELL I NEVER!!! Mind you the trouble is though, by default it insulates the bare cpc ? Even though not designed for that purpose,
as WE ALL KNOW.But does offer a degree of protection against corrosion?
further more you still have not explained why the CPC is not insulated on flat twin....have you... But if it was insulated, it could be used as a 3 core like the flex in this thread?
But as it isn't insulated, and doesn't require insulation as it isn't a live conductor, it can't be used as a live conductor can it?
That reminds me, I'm going to send my fluke multi tester back, there must be something wrong with it, everytime I try to measure volts to earth between live and the pvc sheath of a twin and earth, it displays 0 volts?
But when I measure between the cpc terminal with the cpc of the same cable, it measures a voltage?
Come to think of it, measures a voltage between live and anything with an earth potential? But not on PVC or any other material used for insulating electrical conductors?
I'm going to send it back, I can't believe I paid all that money for it and it has an intermittent fault? Come to think of it, they all have the same fault, every meter and tester I've had has had the same fault for nearly 40 years? I can't understand it?
In fact, the same thing happens when I test for voltage between live and the pvc sheath of an armoured, an FP, a flex, a porcelain pillar, a porcelain sink and bath, a pvc matt on a chacker plate gantry, an insulated enclosure, plastic conduit and trunking, and some other thingys, oh I nearly forgot... and the air?
And I think that's it without taxing my brain.
Maybe you know what could be wrong with my meters?[/QUOTE]
not what you stated at #2
clearly you didn`t...otherwise you would not have made the statement at #2 that you did. I said and I quote..."But certainly not a cpc within a twin and earth cable, as it would only be single insulated and carrying a voltage over 50 volts and not satisfying basic protection". Just in case you didn't understand the anecdote which is swinging toward being an ironic comment.I was refering that if the cpc was used as a live conductor, it would be equivilent to single insulated, if you don't agree with that fact, then please explain why you wouldn't be making contact with a live part if you touched the sheath?
again not what you stated at #2....you implied the sheath was classed as insulation....which it isn`t...regardless of any insulating qualities it may have.....
so dont blame the tools...
i havn`t once blamed your test gear.... I never said you did, I asked you if you knew what was wrong with them, as I couldn't get a reading when testing between live and the sheath covered cpc, and you haven't answered the question?
and you still havn`t answered the (very relevent question) i posed to you at #22 & #27 which was why does the CPC on a flat cable not have any insulation along any of its length?
nearly 40 years in the game....you should know then.....
i suspect you dont....
answer today please
Its so that cheese makers can rub the cheese against the cpc and make gorgonzola and stilton, its been proved its a much more energy efficient and environmently friendly way of making it. Infact they're getting an increase in their rebate from the carbon trust.
And when the circuits are run at low level, it also helps to stop losses arising from slugs and the like from squirming further up the wall and onto the shelves and eating the cheese.
The trouble is though, there could be a departure from reg 514.4.2 paragraph 3, but hey what's a departure in the case of such beautiful flavoured cheese? At least there won't be any slug trails on it.
Hope this answers your question?
And I hope I answered it in the time limit you asked for?
Cheers.
Thanks for coming.
