On 28/03/2020 21:53, Tricky Dicky wrote:

Core colours don't fit but red sheath suggests possible fire alarm from the past

Definitely lighting cable just pulled loads of it out redoing the lighting circuits in our bungalow.


It's lighting. Seen it loads of times. Very late 60's early 70's
installations used it.

When the red sheathed cable is used often the variation to

http://wiki.diyfaq.org.uk/index.php/...ightingCct.jpg

is that the neutral carries the earth, and only the switched live (the
red outer sheathed live and earth) provides the earth at the switch, the
permanent lives at the switch usually are just grey sheathed single cores.

It's a rare install but it does exist.

--
Adam