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All I want to try an do if see if an existing ring main is within limits. I realise I cannot actually measure it but a way to estimate is what I am looking for. Pulling out the entire ring main is not really a viable option!!!

Measuring length by measuring the resistance per metre seems like a possible idea, but would it work it the ring main for instance has been previously extended so that it now looks like a figure of eight? Does that make sense?

Does anybody out there know how you can measure the actual length of a domestic light / power circuit without physically looking? Thanks in advance.

Hi Ian thanks for your posting. Update - have rectified the problem. After eliminating the light fitting and socket by substitution that just left the wiring. There was a voltage at both the socket and light so started to check wiring in the ceiling void back from the single wire entering the...

I have a light in the kitchen which is one has one of those pull up pull down light fittings. It stopped working on Saturday. The live and neutral switch wire entering the light switch is showing a voltage of 5/6v when the light switch off and 10v when on. The live and neutral entering the...