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ir test

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  1. L

    IR Test Results Issue

    I am getting erratic results on a house which i am currently working on. The house has been sat at 2nd fix stage for about 6 weeks and is damp. I came to commission it today and my IR readings are poor. I have a megger so its max is 999MOhms but i am getting results of 80-120MOhms on Rings and...
  2. I

    IR Test

    does anybody know the answer to, " state the three steps taken when a correctly carried insulation resistance test produces unsatisfactory results? The IP rating for a lighting switch 1.2m from the edge of the bath?
  3. S

    EICR Limitation - no L to N IR Test

    Alrite lads, i am am currently buying a house and as part of the valuation report they wanted a EICR doing as the electrics are clearly old. So the owner employed a company to do the report and I have been passed on a copy. Now i I don't do EICR's but one of the limitations sounded strange...
  4. happysteve

    GN3: IR test, whole installation vs final circuit

    Eh up :) Someone tell me where I'm going wrong. I'm reading up on testing theory, using GN3 (6th edition, incorporating Amd 1, 2012). Section 2.7.7, pp40-41. "Simple installations that contain no dist. ccts should pref be tested as a whole, see fig 2.4a." "Test should be carried out with...
  5. T

    IR test

    Hi all IR test at outgoing terminals on main switch on splitload wylex board. All mcb's and both RCD's up. L>E 275k ohms. Limitation in place not to test between L>N, Opinions please. Cheers
  6. J

    IR test

    Some advice please . when doing IR test , generally i test the lighting circuit with the load shorted (L-N) and test across earth and live or neutral as removing all lamps and disconnecting fluorscents is time consuming . now and again i will test the whole CU in this way . Firstly , why is it...
  7. N

    IR test sets off gas hob igniters - WTF?

    As per the title really, IR test @250V DC, (L+N)-E, whole-installation test of domestic property, main isolator switch open (obviously), testing caused the piezo igniters on the kitchen gas hob to spark even though no-one was pressing the knob to ignite them, and failure of IR test at about...
  8. N

    Boiler fails IR test (?)

    Wotcha, I got asked to follow up on a low (<1Mohm) whole-installation (L+N)-E IR result picked up on an EICR (not done by me) on a domestic property. Testing only at 250Vdc, it turned out this is is the result only if the C.H. boiler is in circuit. With boiler isolated, same test yields...
  9. G

    ir test

    ring main getting >999 between l-n l-e n-e but l-l and n-n is a 0.00 reading why is this ???
  10. I

    IR test

    can anyone tell me when testing a lighting circuit between L&N to earth what does it prove , cheers
  11. J

    Ir test on bs 3036 wylex board

    Hi all, l recently did a eicr on a fish and chip shop. 3 phases (only one phase in use by chip shop). Earth conductor is welded together to each phase by TN-S earthing system means. When it came to the IR test, l tested the norm tests, L-E, L-N & N-E. Bearing in mind that we are now supposed...
  12. M

    2/3 way Lighting and IR test

    Hi there. I know that in theory the IR test on a lighting cct requires all loads to be removed (ideally), and the 2 way switching operated and several readings taken - to ensure both strappers are tested. My question is on the logic behind the multiple readings. When the light being...
  13. Baker1988

    IR Test

    hi was just wondering if some one could clear this up for my i keep seeing on the open forum that people do a ir test between l+n to cpc i get shown at college to do the ir between l to e and n to e and l to n so why is it that i keep seeing people say about doing a ir by connecting live and...
  14. L

    IR test 2391 The way to answer ?

    Hi guys, Just wanted to get your advice on answering a 2391 question. If i was to get a question "Describe how to carry out an IR test on a radial socket circuit of a new installation" for example , would i be able to mention the safe isolation procedure like this 1)Seek Permission /Inform...
  15. M

    Combined L&N IR test on all RCBO board

    Hi Carrying out a whole board insulation resistance test , very large house and LOTS of vulnerable equipment so wish to do a L&N combined [ link busbar to neutral bar] on whole board. Each circuit is on a RCBO , how would i test this, do the neutral and earth fly leads of each RCBO need to be...
  16. E

    IR test

    If you have an RCD fitted then leakage from either live conductor to CPC would trip the RCD and a live to live conductor short would trip the MCB. Why do we IR test if there is an RCD then?! I understand it is to check the state of the insulation but the safety measures are there already. I...
  17. P

    IR Test on 12v Downlighters

    Can anyone help me please? I've just finished re-wiring a property, with nearly all lighting on 12v downlighters. Not too sure how to carry out the IR at 500v, as I'm assuming it will blow the transformers. To make it easy they're also all on dimmers lol! I know I have to disconnect the dimmers...
  18. B

    new circuit ir test

    Hello people Testing a new RFC yesterday. Property is a bungalow cable run in loft . All tests perfect apart from IR readings ok all between 400 & 600 meg but new cable would expect nearer >999 Checked cable run as mostly accessable and no damp or new plaster. Only thing is it was extremly hot...
  19. B

    Help! IR test results driving me mad

    Hi all I went round to a house with a view to move a switchline in lounge from 1 side of a door to the other. I tested insulation resistance and got 0.38Mohms L-E. Ok, just a case of identifying which of the cables is causing the problem, sort it out and move the switchline. The circuit is a...
  20. A

    IR test between neutral and earth

    Hi there,another question from me,I have a 10mm radial for oven&hob,so doing IR test It shows me 0.22 between neutral and earth,so I went to investigation what could cause a problem,there is a 60amp JB for that circuit above the hanging cupboards in the kitchen,so first thing I did,disconnected...

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