Recent content by slipnduck

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    TNCS Dist CCT. to TT installation - front end protection question.

    The gist of it was to maintain double insulation as far as possible inside the CU and up to the termination point. The suggestion was to cut the live conductors of the supply inside the adaptable box (in my case Wiska 308) and connect them at this point to double insulated singles (6181Y) which...
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    TNCS Dist CCT. to TT installation - front end protection question.

    Thanks. Yes that was my question. I did call Elecsa/Nic tech line - he said as much but also added that i should ensure the L & N supply tails are double insulated within the CU right up to termination at the switch. Thanks again.
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    TNCS Dist CCT. to TT installation - front end protection question.

    Just wanted to add. I know there are other ways the sub main could be protected front end. RCBO and swap garage RCCB for an Isolator Move the MCB to one of the RCCBs of the house CU and as above. My reason for wanting to feed via MCB was to be able to have the 30mA device local to the final ccts.
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    TNCS Dist CCT. to TT installation - front end protection question.

    Good Morning everyone. Quick question regarding a sub main from a TNCS supply feeding an outbuilding on TT. This is a domestic installation not agricultural. TNCS supply to house feeds High Int. CU from which 4mmsq 2 core SWA feeds an non attached rear building. THE SWA of the sub main is...
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    RCBO passes 30mA but fails 150mA but in a strange way. Any ideas?

    Yes, it's marked as an A. But why would saturation be greater on the x 5 test? This is where my understanding of how the test works comes up short. Is the DC component increased from the x1 test to the x5 test therefore increasing saturation and thus reaction time?? I'd love to know that. I'm...
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    RCBO passes 30mA but fails 150mA but in a strange way. Any ideas?

    I was about to say yes then but now I think on it, the ramp tests come at the end of the auto sequence unless performed as a single test and seeing as it always failed at the first x5 on (+) it halts the sequence. Now I can't recall if I did it as a single test being so caught up in the weird...
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    RCBO passes 30mA but fails 150mA but in a strange way. Any ideas?

    It was still annoying me so I've just been back there (got the key to the place). When I tested it on Friday it was from an energized socket outlet with no other loads connected. As I said I've just been back, I re-tested at the load side of the RCBO with it isolated downstream. Same result...
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    RCBO passes 30mA but fails 150mA but in a strange way. Any ideas?

    BTW Thanks all for considering this. I only bought it up because it was niggling me as I was trying to get to sleep last night.
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    RCBO passes 30mA but fails 150mA but in a strange way. Any ideas?

    The manual is on a CD I'm going to have a read of it now. I haven't until now as I know how to navigate the touch screen to the tests I want to do and how to do them which is pretty much same as before, I haven't had any need of some of the more exotic things it does yet.
  10. S

    RCBO passes 30mA but fails 150mA but in a strange way. Any ideas?

    MI3152 EurotestXC. I think it was the standard kit - came with a set of earth spikes and leads for Ra testing. I'd imagine they all have the same function for type A rcd testing though. Still getting to know it as its new and has a lot of options with regards RCD testing - B, B+, F But I was...
  11. S

    RCBO passes 30mA but fails 150mA but in a strange way. Any ideas?

    I have others in the CU that test ok - their A times are higher than the AC times but all less than 40mS. The strange anomaly is that this on passes x1 in a time that would satisfy the x 5 test but then goes on to fail the x5 tests. Just got me to thinking about how the testers work - but...
  12. S

    RCBO passes 30mA but fails 150mA but in a strange way. Any ideas?

    Morning everyone, this is my first post - although i had an account years before that seems to have been lost. Can any of you shed some light onto a situation I've come across. I have a newly installed RCBO which is failing the x5 test with a reaction greater than 40 mS. Now, I don't have a...

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