Hi, I'm new here and currently answering the question relating to the outside light.
Could it not simply be a case of a faulty switching mechanism in the switch. If there was a short wouldn't the MCB trip when it was on, resulting in the light not working?
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.