On Sat, 15 Sep 2018 16:26:37 +0100, Tim Streater wrote:

I was minded to add: "..., or is it none of these and the three cores
are all 0.5mm uninsulated twisted together" but I couldn't be arsed. Oh
well.

Someone else already covered that in an earlier post about callow 14yr
olds wiring sockets, IIRC. :-)





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