In article ,
Andy Wade wrote:
T&E cable with two red cores is
available but never seems to have gained widespread acceptance -
probably because it sometimes helps to know which wire is the live feed
and which is the switched live.

And that it's simply an extra reel of cable to lug around. Most domestic
re-wires wouldn't use a full reel either which would make it out of favour
for DIY.

I've got some, though. ;-)

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*Why is 'abbreviation' such a long word?

Dave Plowman London SW
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