insulation

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  1. S

    Insulation Resistance Testing Am2 - requires to be tested twice

    Hi, I'm a little confused confused is someone can shine some light on the amendment 2 way of doing IR. I know you have to do one 1st fix at 500V DC and then final one at 250V DC when all cables. What I'm confused about is GN3 states: "...sometimes these cables are terminated without further...
  2. O

    Low insulation reading at 500V

    Slightly strange one this, replaced a few socket fronts in a dining room today, all wiring original but new plasterboard on a studded wall. Its a ring final circuit which does the rest of the house apart from the kitchen. R1 and R2 all ok etc, loop test fine but doing the insulation resistance...
  3. A

    How to do a proper insulation test on an electric motor

    I want to check the insulation of the 3-phase 400VAC asynchronous squirrel cage motor. Motor's stator windings are connected in delta. I've read in some textbooks it is necessary to open motor's junction box and disconnect terminals and remove jumper bars (which are used to establish delta or...
  4. V

    Loft Cables Question Please?

    Hi Everyone, Sorry for all the questions. With he help of a friend, I recently installed some insulation into my mother's loft. Whilst adding the insulation I noticed that a few cables (there are only light related cables in her loft) were tied together with electrical tape, so I spoke with...
  5. S

    Shower Cable and insulation

    Hey all, Ive been in and out of a huge house rewiring as the renovate it for a year of so. Every is thing done and dusted except the downstairs shower. I ran a 10mm from the CU to a stud partition where the Isolator sits and then onto the shower. About 15-20m in total. Ive gone back today and...
  6. sldz1200

    Insulation fluke 1663/1664

    Could someone tell me if it is possible in fluke 1663/1664 to activate the option to carry out an insulation test without having the finger fixed on the test button? I am not referring to the differential test, which I know can be done by detecting voltage and not pressing the "start". I only...
  7. M

    AM2S Insulation Resistance Test on RCBO

    Hello, I’ve got my AM2S coming up and I’ve been revising like mad but I’m stuck on something. I’ve read that it’s a 3 phase board with just one RCBO for the ring circuit. Assuming they want me to do a global IR test, can I take the conductors out of the RCBO, switch it off, and then test...
  8. newfutile

    Insulation resistance problems

    During an insulation resistance test IR at an EICR I measured 0.0014 MegOhms from line to earth. When I disconnected the neutral from the neutral bar it's 116 MegOhms lowest (on the outside bollards). However measuring from disconnected neutrals to earth all read over 200 MegOhms. So it...
  9. M

    Advice on insulated plasterboard around electric cables

    I'm currently refurbishing a room and in the process adding some internal wall insulation. The wall has been stripped and my electrician has completed first fix for new sockets and lighting. The walls are solid brick and as I am installing insulated plasterboards, we agreed rather than...
    • max861
    • Thread
    • advice around cables electric insulated insulation plasterboard
    • Replies: 5
    • Forum: UK Electrical Forum
  10. Justyjust

    Led Downlights for celotex insulation

    I need some help locating suitable led downlights to be installed in rigid celotex, they are being installed in a flat roof but there is 70mm of insulation behind the plasterboard. Does anyone know Of any lights that can do directly into the insulation. Thanks
  11. D

    Stage 2 insulation resistance test

    I have installed a circuit for an oven and carried out all of the relevant testing so far. Apart from a neon on the double pole isolation switch, there is no current using equipment connected to the circuit yet as the property is empty. In this situation, would one just make a note on the...
  12. R

    Insulation resistance for devices

    I was checking the IR on a socket circuit and found 0.4M between neutral/earth. The reading came from a garage door motor that was plugged in. once unplugged the IR was good. Does the circuit need to be cleared of all things plugged in when testing or does this constitute as a fault. I was...
  13. Calebp43

    Insulation resistance confusion

    Been to a fault finding job and lights where tripping the rcbo. After further investigation we found that it was a blue strapper cable (old wiring) from one switch to another using 3 core. Let's call this cable 1. After hacking some of the cable out the wall we found that the other flat t and e...
  14. J

    Insulation resistance test

    Evening chaps, I've been asked to do a visual inspection, and an insulation resistance test on a fishing boat, which is working off 24v, this is a new ruling apparently, and without me signing it off as ok, the boat is currently docked, and not allowed to go out fishing. The visual checks...
  15. W

    additional sockets of insulation backed plasterboard

    So I have inherited a small job in a commercial clients own home. they want extra sockets in a bedroom they are renovating. The walls are insulation backed plasterboard. I would guess around 25mm insulation on 12.5mm boards. To add the extra sockets I was thinking of just chasing out the...
  16. Vortigern

    Is this "surrounded by insulation or on 100mm insulation in your opinion?

    Just designing and taking into account the factors for insulation and can't decide on surrounded or on top of 100mm. What say you? Cables will be in metal banding inbetween the two layers as in pic. So to be clear it will be under the upper board in pic and above the lower board on top of the...
  17. T

    Low Insulation Resistance readings N-E

    Looking for some guidance here. I'm currently shadowing a guy and we're testing a new extension on a school. 3 phase TNCS supply from the original busbar. Feeds a section board and from the section board it feeds 4 3 phase DB's. The DBs have one feed in and then split to a separate power and...
  18. Neptune

    Insulation resistance test on a damaged conductor

    I have a 2 metre T&E cable. I applied a IR test (500v) across P and N to E with the other end of the cable safely sitting on the floor and it reported the meter maximum. As expected. I then completely cut through the N conductor on the cable and repeated the test. It still reports the meter...
    • Neptune
    • Thread
    • conductor damaged insulation insulation resistance insulation resistance test resistance test
    • Replies: 21
    • Forum: UK Electrical Forum
  19. Pegasus

    Insulation Resistance Test, trying to wrap my head around it

    I am self-teaching fault-finding and testing, but I can't wrap my head around insulation resistance tests. From my understanding you send 500V for domestics down the conductors using an Multi-Function Tester, and the values should be over 1M Ohm, now my question is why should the resistance be...
  20. 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?
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