insulation | Page 8

insulation

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  1. R

    Downlights and Loft Insulation

    I have these downlights installed under loft insulation with halogen GU10s. They are marked as fire rated and fire rated under insulation, but the installation just doesn’t look safe? I’m wondering if i should convert them to LED bulbs (that's happening progressively as the halogens blow anyway)...
  2. G

    Insulation coverable downlight

    Hi, I've got a customer who wants downlights installed in their kitchen/dinner. However the ceiling has celotex or equivalent insulation installed above it. Has anyone come across any suitable downlights that can be covered by celotex? Also just to make things harder there isn't any access from...
  3. Mark42

    Insulation resistance failure on rubber flex. Why?

    Two years ago I installed some garden lighting, using u/g SWA to Wiska boxes, then 3-core 0.75mm rubber flex downleads from each LED fitting. This week the 30mA RCBO kept tripping. I assumed a luminaire fault, or moisture in a Wiska box, but no. It was leakage across all three cores of one 10m...
  4. B

    Insulation resistance testing

    Hi have AM2 next week and just need some help, 3 phase TP+N board, two way and intermediate lighting circuit with 3 switches obviously and one light, doing a global IR test, the lighting circuit say is on L1, so I’m testing all other circuits at once too do I have to switch my switches for every...
  5. L

    Metrel insulation testing issue

    I have a Metrel 17th edition multitester with a potential issue in the insulation testing mode. With no leads connected, I would expect a value of 500-900 MΩ but instead I get something around 50 MΩ. Am I right to think there's something wrong with it?
  6. Sparky_marky2

    Fault finding - insulation testing

    Hi everyone, did some insulation testing on my mates house as his RCD was tripping manage to isolate it to the ring circuit, Live-Earth for the ring circuit came to 0.01Mohms and all appliances have been disconnected and removed. However I have disconnected the Live-Earth behind one socket...
  7. 1

    Insulation resistance test

    Hi all on a eicr insulation resistance test between live conductors to earth gn3 says join l & n and test to earth is there any difference between that and testing phase to earth then neutral to earth? As you guys know some boards are a right mess and not in order to locate which belongs to which
  8. S

    Attached bell wire to rendered external insulation

    Hi. I'm pricing up a job. I need to run bell wire up the outside of a newly rendered and externally insulated house. Never touched this before and I'm worried the clips won't fix in securely or will damage it. Is this the case? Any one got any experience /tips? Thanks.
  9. T

    How not to run cables through insulation

    Just saw this. Great demonstration of how NOT to install insulation round electrical cables. No consideration of the CCC of the cable. Sorry pete, I know this is your job, really.....:D
  10. S

    Please help me regarding these topics.

    I have an assignment on Saturday. There are somethings that I do not understand. So Please help me to figure them out. 1)What is the exact value as mentioned by regulations for High Voltage and Low Voltage? 2)If an insulation is good three people should sign to verify. What are those people...
  11. 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)
  12. 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?
  13. 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...
  14. 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...
  15. 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...
  16. 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!
  17. 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...
  18. 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...
  19. 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...
  20. 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

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