insulation

  1. captaincaveman

    Does anyone recognise this wall insulation?

    Hiya. Does anyone recognise this wall insulation? I'm not sure I've come across it before. I'm pretty confident it's not asbestos but it is rather crumbly. Is it chasable do you know?
  2. W

    Insulation resistance query

    Was testing a 3 phase DB for storage heating. While testing I noticed I was getting continuity between 2 of the circuits, which were on separate phases. Each storage heater has its own 20A radial, and when doing an insulation resistance test between 2 of the circuits I get a reading of 0.00...
  3. B

    Insulation resistance testing query

    Downstairs lighting is tripping rcd. Circuit has 4 chandeliers with multiple bulbs and led downlights in the bathroom. Can I just test IR on 250v setting between L,N & E and expect the same results as testing with 500v.
    • bhamoggy
    • Thread
    • insulation insulation resistance insulation resistance testing query resistance testing
    • Replies: 3
    • Forum: UK Electrical Forum
  4. O

    AM2S Assesment , Insulation Resistance

    Just done my exam, passed everything except Insulation Resistance... I can't think how I could've failed because it isn't the hardest thing on the wrold, Tester was on 500V and I tested circuits separately. Only way I could've failed was how I tested my Ring Final, I wago one leg of ring...
  5. HappyHippyDad

    What are the dangers of poor insulation resistance results between neutral and earth?

    What are the dangers of poor insulation resistance results (i.e <1Mohm) between neutral and earth? If all other tests are ok, what are the dangers of the above? My thoughts are it may indicate a breakdown of the insulation somewhere. However, what are the dangers of this breakdown between...
  6. J

    Global Insulation Resistance Testing at CU

    Evening all, as I’m preparing for my Inspection and Testing exam, I wonder if you might put me straight on something please? When performing a global insulation resistance test at the CU, I would link the L busbar to the N bar then afterwards to the E bar. I understand that the circuit...
    • Jenna T
    • Thread
    • insulation insulation resistance insulation resistance testing resistance testing
    • Replies: 1
    • Forum: UK Electrical Forum
  7. S

    Car Charger 6mm SWA cable Query - Loft Insulation

    Hi We recently had an 7kW EV charger installed. Due to the consumer unit being situation within the kitchen of our bungalow, the cable needed to be routed across the loft in order to end up next to the drive, The contract was with a well known brand, who has sub-contracted out the...
  8. K

    Why voltage is not increasing more than 2K in Megger MIT1525 Insulation tester?

    Hi Sir, I'm having a Megger MIT 1525 15KV insulation tester. During testing test voltage is not increasing more than 2KV. these is no physical damaged to the equipment. what could be the reason? pls advise. thank you...
  9. R

    Meter tail insulation

    I had an eicr done recently, the electrician gave a C2 for the meter tails having their outer insulation stripped back too far. Can I take a piece of the grey insulation off a spare tail and cut and glue it onto the missing piece to clear the C2? Much easier than having to strip back as it's...
  10. nomadicsoul

    Insulation added after second fixing!

    Hi everyone. I need a little advice please. Several months ago I first fixed and second fixed a timber frame loft conversion ( open plan living area and kitchen) for a friend /client. I haven't signed it off yet as I was waiting to install I new CU for him and for him to fit the kitchen. I...
  11. K

    Main electrical supply cable asbestos or other outer insulation?

    Hi, Can anyone tell me what material the main supply cable is wrapped with (I believe this cable is owned by the DNO). My concern is whether it is Asbestos? The below photo of the cable taken just below my cut out shows the unpainted section facing the wall to be very fibrous. Also, another...
  12. S

    For Sale Megger MIT230 insulation tester

    Megger MIT230 insulation tester for sale only reason for sale is because it was replaced with multifunction tester. £150
  13. gc4elec

    Insulation/K&T Wiring/Rewiring

    I have a home that is part 1940 and part 2005. The new portion is all new (well 2005 new) romex with grounds. The old is some rewired romex with grounds and some knob and tube (K&T) without grounds. Spoke with electrician and they recommended/installed a whole house surge protector and GFCI...
  14. G

    UK Conduit and loft insulation?

    Hi, Iam replacing my loft insulation to a thickness of 270mm, putting 100mm between the joists and then 270 over the top, then flooring it. I’m Putting 175mm loft legs on top of the joists which are 130mm which should give a slight air gap. My question is there is 20mm metal conduit running...
  15. P

    Insulation resistance of Pink Fibre

    Hi there, Does any one know what kind of insulation resistance to expect for pink fibre wall/ceiling insulation? I'm trying to figure out if the cheap insulation meter I have is actually giving me a reasonable answer. here's a bit of background: I have a GFCI mounted in an electrical panel...
  16. A

    Please Explain Double Insulation

    Hi, Just purchased a new wall light and it has no earth on terminal junction. Instructions say ‘double insulated - no earth required’. Here is a picture: How would this protect you if the wire from wall broke loose from this junction box and touched the casing which is metal? Or is it...
  17. D

    How do you disconnect neon lights in sockets while doing insulation resistance test.

    Hello everyone, I was just wondering how do you disconnect neon lights from socket outlets when doing insulation resistance test, as this will effect the readings, thanks.
    • David345
    • Thread
    • disconnect doing insulation insulation resistance insulation resistance test lights neon resistance sockets test while
    • Replies: 16
    • Forum: UK Electrical Forum
  18. Lucien Nunes

    Low insulation puzzle: what's this?

    Damp here this morning, and the insulation resistance on a piece of workshop equipment seemed a bit low. I could influence the reading by pressing my hands against the outside of one of its controls. That, and the fact it is getting a bit stiff to operate, show that it's time for this control to...
  19. J

    16mm tails insulation

    16mm meter tail cable has a double layer of insulation. What do all think of removing the outer layer of insulation, to make it flexible, when the cable is being run entirely in plastic trunking.
  20. B

    UK Insulation resistance whole board.

    Hi all. Changing a CU in an ex-council flat, pme system, no RCD's, and initially tried to IR test whole board L/N joined to earth, got a reading of 0.28 Ohms. Then did each circuit individually (2 X RFC, 2 X lights, 1 X cooker), L/N joined to the circuit's CPC, and got between 0.25 and 0.30...
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