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Hi all. My questions are to do with the ZE/ZS tests. I have only ever done these tests in a classroom environment. We were asked to build small ring mains or lighting circuits on a wooden board, we would do all the required tests, R1-R2 ZE etc, then take them apart and build a different...

Hi all. It's my 1st time so please be gentle. I have been installing central heating timer switches for a while now. This is my only experience in electrics. I have never done anything else electrical. Recently I went and did an electrical course to get me ready for Part-P and I am waiting for a...