insulation resistance testing

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  1. A

    Insulation resistance testing live conductors to earth

    Hello all, I hope you're all keeping well. I have a question regarding insulation resistance testing. Whether doing a single circuit IR test or a global IR on an entire installation, I usually try to remove all loads, eg lamps, neons etc, but obviously this isn't always possible. So I...
  2. 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.
  3. 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...
  4. D

    Is it ok to do insulation resistance test on RCBO at 500v?

    I know you are not supposed to do a insulation test on circuits that are protected by an RCD at 500v because it may damage the electronic components inside the RCD so that's why you switch the RCD off before you test the individual circuits, however, what if the circuits are all protected by...
    • David345
    • Thread
    • dead test domestic testing fault finding insulation insulation resistance insulation resistance test insulation resistance testing ir test live test rcbo resistance test test and inspect testers testing testing and commisioning
    • Replies: 6
    • Forum: UK Electrical Forum
  5. G

    Insulation Resistance Testing

    Should I remove all the loads when testing between live and neutral?
    • Gassan
    • Thread
    • insulation insulation resistance insulation resistance testing resistance testing
    • Replies: 10
    • Forum: UK Electrical Forum
  6. 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
  7. 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
  8. 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...
  9. P

    rcd tripping during the night and insulation resistance testing question

    Hi everyone I have a customer who has a RCD that trips during the night and it resets ok the following day it is ok for a week or so then it tips again during the night. has any one any ideas and what is the quickest way of finding out what the cause is. also I need to do an insulation...
    • phil lancaster
    • Thread
    • during insulation insulation resistance insulation resistance testing night question rcd rcd tripping resistance testing tripping
    • Replies: 34
    • Forum: UK Electrical Forum
  10. 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...
    • Bradley6969
    • Thread
    • insulation insulation resistance insulation resistance testing resistance testing
    • Replies: 44
    • Forum: UK Electrical Forum
  11. T

    Insulation Resistance Testing

    Evening chaps, In the process of taking my 2394/2395 testing course and just trying to fully get my head around insulation resistance testing predominantly in occupied domestic property's where it isn't possible to dissconnect all loads from the circuit. I am aware of the need to link out the...
    • tommys88
    • Thread
    • circuit circuits insulation insulation resistance insulation resistance testing resistance testing
    • Replies: 19
    • Forum: UK Electrical Forum
  12. J

    Insulation resistance testing Lighting circuit

    Hi everyone. I'm looking for advise on how to test IR on commercial lighting. There's so many lights on 1 circuit , do I have to take out all the lamps in all the lights to perform the test or can I simply test between LN -E ? Even though I have spent lots of time testing domestic installs and...
    • Joseph Lewis
    • Thread
    • circuit disconnect insulation insulation resistance insulation resistance testing lighting lighting circuit neutral neutrals readings resistance testing
    • Replies: 7
    • Forum: Commercial Electrical Advice
  13. E

    Minor Works, Insulation Resistance Testing, and 612.3.3

    Hi all I couldn't find any previous posts on this topic specifically so looking for some advice. I am adding an external security light for a customer. I am extending the existing downstairs lighting circuit. Normally when testing Insulation Resistance I would test between L-N, L-E, N-E...
  14. D

    Insulation Resistance testing procedure

    Hi all Am doing 2394/95 at moment and trying to get procedure firmly stuck in head. Thing I'm getting a little bit confused with is with some of the vids/examples online some state to switch main switch on (obviously before supply connected) and others off. My thinking is that you might as...
  15. S

    Insulation resistance testing

    Hi guys, i have always wondered when doing insulation resistance testing is there a test you can do to see if there are any loads still connected (ie neons,equipment) to see if the readings are true or through loads connected in the circuit.
    • Sb8389
    • Thread
    • always connected earth insulation insulation resistance insulation resistance testing resistance testing tests
    • Replies: 47
    • Forum: UK Electrical Forum
  16. G

    Eicr insulation resistance testing

    Hi All. I am currently carrying out an EICR in a local hotel. I was wondering how each of you carry out insulation resistance testing during a periodic inspection? For lighting etc I have used joining live-neutral together and testing to earth due to the unknown possibility of electronics and...
    • GarryJ
    • Thread
    • eicr insulation insulation resistance insulation resistance testing resistance testing
    • Replies: 16
    • Forum: UK Electrical Forum
  17. 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...
    • Majid Khan
    • Thread
    • acceptable answer insulation insulation resistance insulation resistance testing question questions resistance testing these
    • Replies: 23
    • Forum: UK Electrical Forum
  18. Gazthesparky

    Global Insulation resistance testing

    I was doing a fuse board update the other day and normally I use duel RCD boards with mcb s but instead I used separate Rcbos due to the customer specifying these. I prefer fitting Rcbos due to just that one circuit is disrupted when there is a fault. when quoting for the job I carry out a...
  19. B

    Insulation Resistance Testing - necessary ?

    Recently my boss and I were changing a fuse board(old to new). It was a shared house and some of the tenants were out at work and their doors locked. Not knowing what they had plugged in, in their rooms we skipped the Insulation Resistance test. Everything else was tested fine. My question to...
  20. S

    Insulation resistance testing

    Hi all ran a ring circuit for someone about 6 months ago and when I carried out the insulation test my results were around 250 m ohms for l-n and slightly lower for l-e, anyway didn't think anything of it as we had just plastered all the rooms where the ring circuit went. Returned to the same...

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