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Good point. I won't proceed unless there is an isolator between the meter and the CU. I would be surprised if there is not one as the DNO had to move the incoming cable, cutout and meter when the extension was built.

Is this any clearer?

Hi, Here is a new picture I took this afternoon: The shower circuit is the leftmost, next to the main isolator. Is this 6mm2 cable? I note that for the two circuits that the spark installed, he has not even gone to the trouble of shrouding the CPC. I guess he also replaced the...

Thank you guys :D You have all gone to a lot of trouble to help me understand the reasons why an RCD is desirable in this situation and I really appreciate it – that’s what I wanted, a better understanding. Fitting another enclosure would be tricky due to space constraints where the CU is...

Not meaning to be pedantic here – just trying to increase my understanding and I’m grateful for the input so far. I don’t understand your distinction between points 1 & 2. Point 1 – I think I understand – you come into contact with live and provide a more attractive path to neutral via the...

Great link - thanks. That was a really good scenario (worn seal) Now I can't understand why RCDs for showers are not mandatory :shock:

This is where I am a little fuzzy. My hobby is electronics so I have a good basic understanding theory wise but I’m trying to work out a scenario where it would be dangerous. I know an RCD looks for balance between phase and neutral and is therefore very sensitive to small current leakages. A...

Wow - quick replies. Unfortunately I did use a phone and there’s no flash on it. I could only see how crap the pictures where when I got home. I will take my proper digi camera over tomorrow and get some decent photos. There an isolation ceiling pullswitch next to the shower. It’s a...

Hi, I’ve been reading through these forums and I’m hoping that some of the regulars can give me some advice please – and I know that you love pictures, so I’ve included some! I took these photos with my phone but I can take my digi cam over there tomorrow and take some more if these are not...