insulation resistance | Page 6

insulation resistance

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  1. D

    Insulation Resistance of floodlights

    I keep getting short circuit between live and earth. I can't work out wether this is normal or a genuine fault. Unfortunately I can't lower the floodlight to inspect further. Can only test at the bottom of the base. Can any one help?
  2. R

    Falling insulation resistance

    Yo folks, Not sure that this isn't the second post on same topic, first hasn't appeared. Apologies if so. Ahead of altering upstairs lighting circuit to add a couple of downlights to an ensuite I carried out the usual tests. Got odd IR results. L-N >1000, L-E >1000, N-E 10!. Did a bit of...
  3. rustynails

    Insulation resistance on a lighting circuit

    Today I got 0.11 Mohm L-N>E at 250v then the same at 500v on a 6amp lighting circuit wired in the 70s which is the only lighting circuit for the house. Customer did not want me to remove the lamps. I forgot to ask or see a bell transformer or aerial booster. No faults known to the customer. MCB...
  4. Dean Williams

    insulation resistance test method 2

    Hi gang im currently testing a power station, ive been told to use method 2 ie link live to neutral and test to earth on all the lighting circuits, which are all in SWA on tray with no switches in the circuits. all readings ok so far, but the last couple are reading 0.00ohms. these circuits...
  5. O

    Insulation resistance on candle 52w candle lamps new halogen type

    please could anybody explain why I am getting a high insulation test live to earth on a chandelier with 7 of the above lamps in when a lamp is removed the reading improves by 2 m ohms for each one.
  6. J

    Insulation Resistance

    Hi guys, I've recently just completed a rewire of a small 2 bed bungalow consisting of 4 circuits. I have tested the kitchen ring and it has tested fine, the same with the lighting circuit. On testing the heating circuit and general ring main, the insulation resistance between L-N on both...
  7. HappyHippyDad

    Does anyone have a list of expected Insulation Resistance test results?

    I would like to get a better understanding of what the specific IR test results could indicate. I'm talking more about the below 1MΩ area. I'm talking about.. wet plaster, flooding (sitting in water), degraded insulation etc etc, I realise it wouldn't give the answer but it may help in narrowing...
  8. D

    Newbie Insulation Resistance question

    Hi all hope everyone's had good weekend. I am currently studying for 2394/5 and and getting used to testers/testing by doing abit around the house. Where the insulation test is concerned i still have a few questions. I have a 2 way lighting circuit in living room and although i know that i...
  9. B

    Poor Insulation resistance?

    I am currently Insulation testing a new install and all circuits have been greater that 299 meg ohms apart from 2 circuits where I get greater than 30.6 meg. On a new install surely this is not correct. Nothing is plugged in and no electronics are on the circuit. Both circuits are socket...
  10. R

    Insulation Resistance Test for FICA

    Hi guys sorry for posting as I know there is a lot of posts similar to this. my problem Is for my trade test I am a little confused about insulation resistance test. I know most of it for example lock off at main switch remove all sensitive equipment test between live-neutral live-earth...
  11. M

    insulation resistance on a domestic ring circuit

    how would you calculate the insulation resistance on domestic ring circuit when measuring with both live and neutral conductors connected together to the circuit protective conductor, is there any way of calculating the approximate value before using a insulation resistance instrument. cheers
  12. B

    three phase motor insulation resistance test

    Hi all wondering if you could help clear something up for me. I was recently working on a three phase motor rated for 480volts a.c and wired in delta. So before powering up I done my dead testing and done my insulation resistance test at 500volts d.c which I thought was correct but read up on it...
  13. B

    insulation resistance

    I'm fed up of having to disconnect all conductors out of the rcbo's to obtain an insulation resistance test, does anyone having a better solution to bypass this to make life easier.
  14. A

    Most accurate Insulation Resistance tester out there?

    I'm just wondering is there a really accurate IR tester on the market many thanks
  15. R

    Insulation Resistance test in FICA

    hi there I have my FICA in a couple months time and generally feel pretty confident but not too sure about the insulation resistance. I know how to test it just not sure of what precautions to take and how many tests need done? also how many times do I need to flick the light switches so that I...
  16. S

    Insulation resistance test

    Hi. Has anyone had a problem with a Megger MFT1552 with regards to insulation resistance testing? All if a sudden mine won't work & displays 500mA. I've tried a couple of new fuses but still nothing. Everything else works fine....
  17. C

    TL Inverters DC Insulation Resistance problems

    Having followed the Power One TL inverter thread I thought I would start a thread covering TL inverters in general. We have had 2 SMA 4000TL inverters DC Insulation Resistance problems reported this week. One we were out at yesterday and found it was possible to trick the inverter into working...
  18. Majid Khan

    Insulation resistance testing

    Hi guys, Could anyone help me Please with the following questions? I have an assignment to do which has a question that states, Insulation resistance testing has been carried out on the installation and the following result obtained: Live to Live = 195 M ohms Live to earth = 0.75 M ohms...
  19. TheSilverSpider

    Low Insulation Resistance reading of 0.63 MOhms , what does this indicate?

    on a ring testing Insulation Resistance L-N shows 0.63 Mohms but L-E is ok. I checked with the home owner that nothing was switch on, nor plugged in still.( its a 3 bed semi, looked every nook and cranny) Is that kind of reading tell tail of anything causing that in particular, or is it a case...
  20. R

    Insulation resistance

    Getting really low insulation res. readings from my D.B. Neutral bar to Earth bar 0.35 M.O Line & Neutral to earth 0.35 M.O So strange, R.C.D. DOES NOT TRIP! Have tried removing main earth and this makes no difference If any 1 could shed any light be great Cheers.

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