insulation

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  1. J

    new build 1st fixing with insulation!

    afternoon guys how would you go about 1st fixing this... would the builder usually batten/stud out- then board- or will they be wanting to board straight onto the walls?? only meet the client so far (not builder)
  2. R

    2.5mm ring main and Celotex Insulation

    I am building a garden office and currently have 25mm Celotex in the walls. I am running the ring main around and then want to add some more Celotex. My question is how much of an air gap do I need to leave for the ring main?
    • Roger Perkin
    • Thread
    • 2.5mm insulation main ring ring main
    • Replies: 19
    • Forum: UK Electrical Forum
  3. P

    Cables with thermosetting insulation (XLPE cables)

    I understand that XLPE cables operate at a maximum temperature of 90c compared with 70c for PVC insulation. What I don't understand is why the increased temperature permits a reduction in conductor size if XLPE insulated cables are used in preference to cables having PVC insulation. If the...
  4. W

    wiring a ring in 2.5 is no longer acceptable?

    So my boss had the NIC inspector out the other day and he mentioned that wiring a ring in 2.5 is no longer acceptable. He stated that even wiring a ring in 4mm is now pushing it when it's installed in insulation. We have always wired rings in 4mm as we wire large holiday homes. All my other...
  5. S

    500v Insulation Resistance Test ok?

    Hi all, still training so please forgive my very simple question. Why is it ok to test an appliance at 500vdc when PAT testing but great care should be taken to remove all equipment when IR verifying a new circuit installation? Is it simply just because connected equipment will make a nonsense...
    • shinypen
    • Thread
    • connected equipment great insulation insulation resistance insulation resistance test resistance test testing
    • Replies: 4
    • Forum: Electrical Testing & PAT Testing Forum
  6. E

    Ci - for cable calcs

    Also just revising: trying to apply a rating factor for insulation on a cable calc. Just in theory, it's not for an actual job. The cable will be clipped direct to joists above ceiling and is covered in >100mm thermal insulation. I cannot find the correction factor for insulation. Advice please!
  7. Startinez

    Loft insulation - alternatives to fibre glass

    Afternoon all, I am soon to be boarding out the loft on my new home as there's nothing of the sort up there currently. It is just to be for storage so I think I'm going to use 11mm OSB sheets for the actual boarding. When I went up there to measure up, I noticed the FG insulation has seen...
  8. D

    SMA 4000TL 'Insulation resistance' error

    I've recently found the green light flashing and the red light on on our SMA 4000TL with the message 'Insulation resistance, check generator' on the display. Checking the ERROROB2.CSV files I can see that this isn't the first time it has errored in this way, it has happened on odd occasions for...
  9. S

    Worst tested cable I ever found doing a EICR

    Last year at night I was carrying out Electrical Inspection and Testing and Found the 300mm 4 core SWA sub main cable to a chapel was recording 0.09 ohms on carrying out high insulation resistance testing between phases. 25 thousand pounds later its rectified. Would love to hear other people's...
    • Sam cook
    • Thread
    • cable carrying doing eicr found insulation megger resistance tested testing worst
    • Replies: 26
    • Forum: UK Electrical Forum
  10. B

    Insulation test on shower with neon switch

    Doing an insulation resistance test on a shower, can someone explain how to bypass the neon in the isolator? Do most people chock block bypassing neon or another way? Also for a lighting circuit with flurocents? Thanks
  11. C

    Seaward PrimeTest 350 Auto Options for IT Equipment

    I have a Seaward PrimeTest 350 and noticed these two options in the auto test menu: H) IT Equip CLI PE Current Which does these tests: Earth Continuity 0.10 Insulation 1.0 PE Conductor Current 3.50 I) IT Equip CLII Touch Current Insulation 2.0 Touch Current 0.25 Is this correct as I did not...
  12. Pat H

    Drilling joists

    Doing a loft conversion and wondering about joist drilling. OSG states to drill in the middle of the joist 0.25 to 0.4 of joist length. I have 6" joists but the bottom 4" will be filled with 100mm celotex so If I drill at half way my cabling will be in the way of the insulation. It makes more...
  13. P

    Low insulation resistance reading

    i've recently installed a new Consumer unit at home and will be using it as my first niceic assessment. I'm getting an insulation resistance reading of 1.7 on a lighting circuit in the osg it says minimum reading of 1 is this going to be ok? I've discovered what section of the circuit is giving...
    • PJW
    • Thread
    • cable circuit damaged insulation insulation resistance reading resistance
    • Replies: 11
    • Forum: UK Electrical Forum
  14. N

    Insulation Resistance test with 12v transformers

    I am installing a C/U and the kitchen has some old Down lights installed with 10 x 12 volt transformers connected. I know I could disconnect all the transformers but I don't plan to do that as it will be a real pain due to how the plasterboard has been bodged. Some opinions suggest the IR...
    • Nicebloke
    • Thread
    • 12v connected insulation insulation resistance insulation resistance test resistance test transformers
    • Replies: 3
    • Forum: UK Electrical Forum
  15. Dave

    How to check the integrity of insulation?

    I recently bought a house and started to rewire it. A sparks mate came and helped with a few bits and I got him capping the chases. He put a nail through a cable in one chase, then told me he may have done it in a couple of other places, he's not sure! I had a plasterer going round behind me...
    • Dave
    • Thread
    • cables check insulation integrity other sparks through
    • Replies: 22
    • Forum: UK Electrical Forum
  16. T

    Insulation Resistance Testing

    Evening chaps, In the process of taking my 2394/2395 testing course and just trying to fully get my head around insulation resistance testing predominantly in occupied domestic property's where it isn't possible to dissconnect all loads from the circuit. I am aware of the need to link out the...
    • tommys88
    • Thread
    • circuit circuits insulation insulation resistance insulation resistance testing resistance testing
    • Replies: 19
    • Forum: UK Electrical Forum
  17. I

    Un-sound electrical connection of live conductors

    Guys can you explain what may result of un-sound electrical connection of live conductors? Your advices will help me alot, thanks✌✌
    • Ilaya
    • Thread
    • conductors connection electrical insulation joint live
    • Replies: 8
    • Forum: UK Electrical Forum
  18. G

    Load and heat

    Hello. New to this forum stuff so hopefully this makes sense. I've recently installed a 10mm 3core cable (H07FN-R) to power a 12kw electric boiler. On full power the boiler is drawing 46Amps. I'm a bit concerned as the cable is omitting a slight heat when drawing this load, was just wondering if...
    • Gordon lees
    • Thread
    • boiler cable heat installed insulation
    • Replies: 46
    • Forum: UK Electrical Forum
  19. David Prosser

    Question about LED downlights

    I just need something clearing up as I have not done domestic wiring for a good few years now. If I fit LED down lights that have no replaceable bulbs so can’t be over loaded, do I need to fit the in intumescent hoods for lights going into the loft or just some sort of device to keep the...
  20. buzzlightyear

    micc on rcbo

    micc on rcbo will not set

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