I have a ceiling rose with a twin live / neutral wire and no earth.
This is unexpected as the house was built in 1986 and the light switch does have an earth.
Can I still use this with light fittings that are not double insulated?
Read more at diynot.com:
I am going to follow [a suggestion made in the above link] to replace the 2 core flex with 3 core flex. If I am only connecting it between the rose above the ceiling and the rose below, can I use standard 3 amp / 720w flex or do I need higher-rated non-flexible wiring? It is only connecting to a decorative pendant lamp.