I have a mid 60's flat and a light in one of the rooms suddenly stopped working a while ago. I swapped the bulb and checked the connections at the switch and ceiling rose. All connections seemed ok but the light still did not work. The switch worked fine with a multimeter continuity test. There did not seem to be any voltage at the wires going into the switch though.
A couple of times the light has just flickered on and then off for a second or so before staying off again.
I have been told that the wiring from the fusebox is "pyro" mineral insulated copper cable (MICC) which I am not familiar with. I had borrowed a tool to detect metal/voltage in walls but due to the copper coating of the wires I don't expect it will be much use...?
So, a couple of questions...
- What is the most likely cause of intermittent failure with this type of wiring?
- Is there any way to determine where the problem might be, without physically digging out the wiring from walls/floor/ceiling?
Thanks for any help, Andrew