I was going to post this in DIY but it appears locked for some reason, so here we are.
Downstairs bathroom light flickered and went out, the three fittings on this spur are now not working. (Due to various building works, three lights are on a spur from the garage ring, which is itself an extension of the kitchen ring). This happened once before, but removing then replacing the 5A fuse in the spur "seemed" to fix it, but not this time. I suspected a loose wire and have checked every reachable connector but can't find any loose connections. But on checking the 5A switched fusebox with a Fluke dvm I find 240v to the spur, and something strange on the isolated section - 95k ohms rising slowly to about 120k ohms while watching for half a minute. This is too high to be bulb resistance with a fitting switched on and much too low, I believe, to be insulation resistance.
I'll have to call out a Proper Bloke but does anyone have any suggestions? the fuse is still fine.
Downstairs bathroom light flickered and went out, the three fittings on this spur are now not working. (Due to various building works, three lights are on a spur from the garage ring, which is itself an extension of the kitchen ring). This happened once before, but removing then replacing the 5A fuse in the spur "seemed" to fix it, but not this time. I suspected a loose wire and have checked every reachable connector but can't find any loose connections. But on checking the 5A switched fusebox with a Fluke dvm I find 240v to the spur, and something strange on the isolated section - 95k ohms rising slowly to about 120k ohms while watching for half a minute. This is too high to be bulb resistance with a fitting switched on and much too low, I believe, to be insulation resistance.
I'll have to call out a Proper Bloke but does anyone have any suggestions? the fuse is still fine.
