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  1. Msitekkie

    PAT IR fail on old cooker with rods not cable

    That did the trick. Great tip, many thanks 8-)
  2. Msitekkie

    PAT IR fail on old cooker with rods not cable

    I am PAT testing a very old 2100W Belling tabletop cooker that the customer is keen to keep & paying me to repair. It fails a L-E or N-E IR test at 0.46 M ohms. Internally the cooker uses bare rods rather than cable. I replaced the old cable & plug and L-N I get > 1999, but L-E or N-E still...
  3. Msitekkie

    Smallest Sub-Main board with selectivity

    It is TN. 100A main fuse at the service head. There is TT at the outbuilding end, but the sub main cable itself is on TN earthing & separated from the TT. If overcurrent protection is required in the manner pc1966 suggests, that means fitting an MCB. As I want to be able to isolate this circuit...
  4. Msitekkie

    Smallest Sub-Main board with selectivity

    Good question. I hadn't considered the possibility I could get away without it (& thus without selectivity issues). It is SWA cable, part surface, part buried. The reply from pc1966 below appears to suggest, protection is required, although he specifically mentions overcurrent protection for...
  5. Msitekkie

    Smallest Sub-Main board with selectivity

    I need to fit a small sub-main board by my service head, to feed a garage unit in an outbuilding. I am thinking of using a Chint shower unit (Screwfix), but replacing the internals with a S Type Time Delayed RCD. Is this a valid approach for a sub-main, as opposed to using a switch/fuse unit...
  6. Msitekkie

    OK to swap B MCB for Type C or does my C load have to go on it's own breaker?

    That's really helpful, thanks.
  7. Msitekkie

    OK to swap B MCB for Type C or does my C load have to go on it's own breaker?

    "The unit should be protected by a suitably rated isolator and fuse or type C MCB. An inrush current (initial current through the lamp) can be expected at switch on. This current can be as high as 12 times the normal operating current, lasting less than 20 milliseconds. This effect can also vary...
  8. Msitekkie

    OK to swap B MCB for Type C or does my C load have to go on it's own breaker?

    Sorry I don't know yet, I'm still weighing the job up at the quoting stage. Interesting that your question suggests that makes a difference to the answer...
  9. Msitekkie

    OK to swap B MCB for Type C or does my C load have to go on it's own breaker?

    I have a customer who want's me to fit a 3Kw Patio heaterto a garage. - I believe this requires a Type C breaker. There is limited space in the board, so wanted to get peoples views on whether it's OK to swap an existing B type (used for sockets) for the C type, or whether the C type load needs...
  10. Msitekkie

    UK TN-S Looped supply - earth upgrade. Need to isolate neighbour/refer to DNO?

    Thanks again Tim and everyone else. UK Power Networks are booked in to go have a look on 18th Feb. Will be interesting to see what they do. The unsheathed cable disappears under the floor. If it was the DNO earth wouldn't it be a "sweated" connection to the sheath at the top of the cable where...
  11. Msitekkie

    UK TN-S Looped supply - earth upgrade. Need to isolate neighbour/refer to DNO?

    Thanks Tim, I was going to upgrade to 10mm (has 16mm tails) but was coming round to the view it maybe should be the DNO. I Wanted to sanity check first as I haven't come across a looped supply before
  12. 6655677291.jpg

    6655677291.jpg

    • Msitekkie
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  13. Msitekkie

    UK TN-S Looped supply - earth upgrade. Need to isolate neighbour/refer to DNO?

    Thanks Tim. Yes, upgrading the earth is the issue I'm trying to address - I was going to make it 10mm (16mm tails). I was coming round to the view myself perhaps I should be asking the DNO to do it, but as this is the first time I have come across a looped supply & I have never heard of such a...
  14. Msitekkie

    UK TN-S Looped supply - earth upgrade. Need to isolate neighbour/refer to DNO?

    I have come across what I think is a looped supply - like a normal incomer but two of them coming up side by side. It's a TN-S arrangement with an earth cable looped between the two incomers and on the the consumer unit. Trouble is it's only about 1mm, although I got a decent ZE of 0.35. It...
  15. Msitekkie

    Bulb placed into special administration - What now?

    Another one with Octopus. Always seem to be rated highly with Which? I am planning on getting a battery system to add to my solar panels, so Octopus "Outgoing Agile" will be a no-brainer. Octopus seem to be way ahead on innovation, clearly some very switched on people running the business - I...
  16. Msitekkie

    Why does RCD trip when fused spur switched on

    Yes, it was consistent for a long period, but once it went it was gone. I was also suspecting water ingress as showers had been in use earlier & there was a previous occurrence some months ago where I believe the same circuit tripped as a result of a leak from the shower waste - on that occasion...
  17. Msitekkie

    Why does RCD trip when fused spur switched on

    So you think replacing the FCU will fix the problem? By "wiring within the FCU" I take you to mean the fuse and internal metalwork that makes the connections. The wiring as in the two legs of the ring, remains the same whether the FCU is off or on, doesn't it?
  18. Msitekkie

    Why does RCD trip when fused spur switched on

    Clearly there is an intermittent element to the fault, but the fault was consistent for maybe a couple of hours. "fault in the cable". What cable? The fault still occurred with the spur disconnected & I did insulation resistance tests to check the spur anyway. If cable elsewhere in the circuit...
  19. Msitekkie

    Why does RCD trip when fused spur switched on

    I was called out last night to an RCD trip issue. I found that switching on the fused spur to the washing machine would cause the trip & I could only reset the RCD after switching it off. Straightforward up to that point, but after unplugging the washing machine, then disconnecting the spur...
  20. Msitekkie

    End of halogen light bulbs spells brighter and cleaner future

    All the reporting I have read so far focuses on the ban of halogen bulbs - the government announcement also mentions "high-energy fluorescent lightbulbs"... I am not sure what they mean by that, if it were all fluorescents as the Mirror seems to suggest, that would be a bigger story. They all...

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