On Monday, May 5, 2014 9:23:44 PM UTC+1, Gareth Davies wrote:
The people who lived here before me wired outside security/night lights

not to the lighting circuit but to a socket ring. Although controlled by

a wall switch the lights actually plug in to a socket inside.



It's not the best job in the world.



I've been using the lights with my old style fuse box and a plug in RCD

which does trip every now and again - probably three times a week.



I'm having the fuse box replaced with a consumer unit and I am

pre-empting nuisance tripping from these lights.



Is is best to just disconnect them completely or is there any way of

isolating them so that they don't cause nuisance tripping?

The answer here is to fix the cause and not the effect. If the lights are problematic you might as well just have them replaced along with any cabling.

As you are having the consumer unit replaced, a dedicated RCBO and circuit to run the lights is the rolls royce solution and means any tripping won't affect another circuit.

Philip