resistance

  1. KeenPensioner

    Insulation resistance with broken line conductor

    Hi, I'm not an electrician but I'm studying the material required for the C&G 2394/5 just for the sake of it. I think I understand the theory behind insulation resistance testing (but maybe not!) and the reason the test is performed at 500V (insulation condition, fault finding) and that loads...
  2. S

    Insulation resistance testing

    456megaohms on a 25m 3core swa is acceptable as its more than 1megaohms. Correct.
    • Sparks321
    • Thread
    • insulation insulation resistance insulation resistance testing resistance testing
    • Replies: 1
    • Forum: UK Electrical Forum
  3. HappyHippyDad

    Global Insulation resistance <1MΩ but individual circuits are all > 1MΩ

    With regards the title is the reason for this because the circuits are all in parallel? I am talking in relation to a L/N - E test. If Rt = global resistance for whole CU and R1, R2, R3 = L/N - E resistance for each circuit then am I right with the following: 1/Rt = 1/R1 + 1/R2 + 1/R3 So...
  4. P

    Low N/E insulation resistance

    Hi all, Just installed a brand new radial circuit for the upstairs sockets with Prysmian 2.5mm T+E, around 21 metres in length. When testing the insulation resistance of the circuit upon connection to the consumer unit, I seem to repeatedly get around 49 Megohms when measuring Neutral to Earth...
  5. D

    Quinetic controller ok with 500v insulation resistance test?

    Hello Everyone Hopefully the title is self explanatory. Or should I disconnect it for the test?
    • Deleted member 112675
    • Thread
    • controller insulation insulation resistance insulation resistance test quinetic resistance test
    • Replies: 6
    • Forum: UK Electrical Forum
  6. R

    Insulation resistance check

    Hi - I have a Warm-up underfloor heating system. And it's stopped working. I did a basic resistance check - and clearly there's a problem (shows just 18ohms when it should be nearer 200). Warmup have said they can send an engineer around to lift a tile after doing a thermo heat check...
  7. T

    Resistance in a Volt meter

    Most meters today I understand are multimeters but I am only interested in the volt meter circuitry. The reason I am asking this is because the volt meter seems to only register voltage across a load and not on a plain conductor such as the neutral circuit. In my limited experience and...
  8. SparkySy

    aemc ground resistance tester 3705

    Hi to the knowledgeable collective, I recently was given one of these clamp meters for helping a friend out, however upon researching its uses it looks like it's for testing ground spike or plate resistance. Has anyone used one of these and do you have any guidance in their use? I found the user...
  9. D

    resistance problems 2002 jaguar S type

    Hi bit of a strange one as load is put on my electrical system the resistance across body earth increases if I measure negative battery lead resistance it rises from 0.1 Ohm to about 10Ohms Any ideas how to fix Cheers Dave
  10. E

    Insulation Resistance Results

    Hi, I’d like some clarification with regards to insulation resistance results I’ve got. Carrying out initial verification on a new ring final circuit. New cable, 9 new MK double sockets. r1 - 0.43 rn - 0.42 r2 - 0.68 R1+R2 - 0.28. Carried out insulation resistance test: L-N - >2000 MOhms L-E...
  11. W

    Body’s resistance with mcb only

    If there’s 230v and the body’s resistance is high .. Meaning the current will be very low but enough to kill you. Can we get electrocuted without having a 30ma rcd to stop this as the 6amp breaker will not have tripped ?
  12. T

    Insulation resistance test on length of SWA cable

    Doing new supplies for a school new Shneider 3 phase & N MCCB panel board. 50mm 4 core SWA one end made off in the board earth fly lead from banjo to earth terminal. The other end gland made off in gland (fly lead not made off yet) 3 phases and neutral just hanging there. Done installation...
    • Toneyz
    • Thread
    • cable insulation insulation resistance insulation resistance test length resistance swa test
    • Replies: 52
    • Forum: Talk Electrician Forum
  13. Ewi

    Current draw discrepancy

    Hey all. Im new to this forum. Seeing how limited d web is to rectifying any electrical queiries, i thought i might find this useful. I am a warranted electrical domestic licencee. (Based on IET) and possess a Higher Diploma in Electrical Engineering. I live in Malta (EU) which uses a UK...
  14. Tom Crabbe

    MINIUM INSULATION RESISTANCE READING

    Hello, has anyone noticed in the new GN3 that any reading below 20 Mohms now has to be investigated or is this a printing mistake as it used to be 2Mohms? Thank you Tom
  15. G

    leaking resistance _0,450 Megaohm

    Hello, I recently encountered a problem with a washing machine. The washing machine tripped the RCD during its operation . I visited the place, uncovered the metallic parts of the washing machine and I searched for the current leak. I measured a leakage of 0,450 Megaoghn between on leg of the...
  16. Bobby34

    Insulation Resistance testing method

    Good afternoon, apologies if this has been covered before i've not long joined so gradually finding my way around. I have my Part P assessment coming up on a new installation and would like to hear some opinions on how people carry out their IR tests. In guidance note 3 it gives an example of...
    • Bobby34
    • Thread
    • insulation insulation resistance insulation resistance testing method resistance testing
    • Replies: 19
    • Forum: UK Electrical Forum
  17. J

    Insulation Resistance...

    I am just working through my understanding of the insulation resistance test, and I want to find out the best way to do the combined Live-Earth test where the Line and Neutral conductors are connected (joined, or however it is best described) through one probe of the tester, and the other probe...
  18. N

    insulation resistance test on shower circuit with neon isolater

    On a new install of a shower circuit, with a neon isolater, is it better to use choc blocks to bypass neon isolater or would it be ok to just test live-earth (live being neutral and live combined) and miss the live-live test? If testing just live-earth, would you write it down in details of...
    • n180
    • Thread
    • circuit insulation insulation resistance insulation resistance test neon resistance shower test
    • Replies: 5
    • Forum: UK Electrical Forum
  19. naylorpd

    Insulation resistance test issue

    Back in 2013 I had a Domestic Electrical Installation Condition Report done on my rented property - nothing horribly major but one thing I didn't understand... I had a C3 code for "0 ohms readings for I.R test for sockets & lighting (unable to remove all loads sockets, lighting had electronic...
    • naylorpd
    • Thread
    • insulation insulation resistance insulation resistance test issue resistance test
    • Replies: 25
    • Forum: UK Electrical Forum
  20. F

    Insulation resistance testing on eicrs

    Advice or quicker ways for doing i r tests on an eicr generally what I have been doing over the years is live to earth neutral to earth and joining live and neutral together then testing to earth job done but my pal who has recently had his annual nice i c visit said he's been shown a new...
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