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- This topic has 6 replies, 3 voices, and was last updated 13 years, 3 months ago by David Olivier.
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13 December 2010 at 8:23 pm #31421
Does anyone know if this can be bought (for lighting purposes) with less than 1.5 mm diameter wires?
Since the power consumption of a lamp has fallen from roughly 100 to 10 watts since the 1980s, and the starting current has also fallen sharply, it doesn't seem very logical that the wire for lighting circuits has stayed the same.
The reason I ask is that the version with 1.5 mm wires is inconveniently bulky for the space available.
David
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14 December 2010 at 3:50 pm #37699Anonymous
Hi David, you can get LSZH cable with starting diameters of 0.75mm (318-B LSZH cable) or 6242B LSZH starting at 1.0mm
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14 December 2010 at 4:31 pm #37700
Dear Jean Marc
That is very helpful. Thank you so much. It will save a lot of space (and simplify the trunking) if I can get hold of twin and earth lighting cable in 1 mm or 0.75 mm diameter.
I would be interested to know which wholesalers you use, as my electrician doesn't think he can get it from any of the suppliers in this region (Herefordshire.)
David
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14 December 2010 at 5:12 pm #37701Anonymous
Hi David
There is British Cables out of Coventry http://www.britishcables.co.uk ; BATT out of South Glamorgan http://www.batt.co.uk and Eland cables of Doncaster http://www.eland.co.uk -
17 December 2010 at 3:17 pm #37702
Jean Marc
Thanks for this. So far, none of them have replied to me – maybe Xmas has this effect – but I will try and get something more flexible than 1.5 mm. Others who've used 1.5 mm confirm that it is difficult in confined spaces.
One of these companies, I think British Cables, has cable in which all three wires are sheathed. I seem to recall that in UK practice the earth wire is normally left bare, as in standard twin and earth LSF cable. Doubtless anything different could only happen with the agreement of the electrician. and it will have to be approved by Building Control who in my case under part P will appoint another electrician to inspect the work
David.
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17 December 2010 at 6:44 pm #37703Anonymous
try this lot , branches through out UK ,
they seem to have a 'trade price' to anyone policy, which I like
http://www.tlc-direct.co.uk/Main_Index/Cable_Index/Firetuf/index.html -
23 December 2010 at 3:02 pm #37704
Thanks a lot. I will follow this lead up.
BTW I have discovered that some companies appear to be selling cable where the outer sheathing may indeed be zero halogen (materials like XLPE or silicone rubber) but the individual wires are still sheathed with PVC. But the whole point of the exercise is to avoid or reduce PVC and PVC cannot in any way be described as zero halogen.
By analogy to EPS insulation, which “Environmental Building News” revealed is increasingly full of dubious flame retardents, I suspect that if PVC has been treated to reduce the spread of flame it may be more toxic than “normal” PVC.
Has anyone else checked this point previously?
David
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