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insulation resistance

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  1. S

    Insulation resistance testing on sensitive equipment

    When doing an insulation resistance test on selv spots what's the best way to do it without disconnecting all the transformers? Can you do a complete consumer unit insulation resistance test by linking the live and neutral bars together and testing between earth on a 500 volt test or should...
  2. S

    Insulation resistance help on a ring main.

    Hi all having a few issues with an insulation resistance test on a ring main. Firstly carried out my continuity test, End to end, L-l 0.93 n-n 0.90 e-e 1.46 R1+n 0.47 r1+r2 0.61 So then moved onto the insulation test. Checked all the sockets for tightness, made sure nothing was...
  3. S

    Insulation resistance help

    Hi all, just a quick question when doing an insulation resistance test on a 2 way lighting circuit do both switches have to be open at the same time to get a <500 m result, because when they are both open and both closed I get this result, but when one switch is open and the other is closed I...
  4. L

    Insulation Resistance Test

    HiI have just test a couple of phone chargers in my house using a Kewtech KT71.When i have pressed the class 2 test it goes through it sequence and then fails on insulation, but if i press the test again (still on the same test i think)it passes. Now if i was doing this test for real would i...
  5. G

    Insulation Resistance testing of Emergency Lighting circuits

    This is proving to be a pain in the backside. It just impractical to disconnect the emergency, as they are hard wired. So apart from putting notes on the test sheets, how can I get good readings, at present I am getting 100 ohms on all conductors, with emergency connected. When the emergency's...
  6. S

    Insulation Resistance Test with Fluke 1652

    I'm using a Fluke 1652c as my MFT. When I do the Insulation resistance tests at 500v - sometimes the result is displayed immediatley i.e >500 Megohms , other times the resistance seems to climb slowly, peaking around a figure. As this figure is generally massively in excess of the required 2...
  7. E

    Insulation resistance test dc side

    I am going to do my first install and at the risk of getting shot down, I was told on my training that you can NOT do a insulation resistance test dc side? However since been told by a friend that is wrong! Can someone please tell me the exact sequence, as everyone has a different take on this...
  8. 1

    Minor Works certificate - Insulation Resistance test - Advice Please

    I am currently doing work that will require a Minor Works Certificate on completion. The property I am working in is council owned and the occupant is currently in hospital. Due to the amount of work being undertaken ALL of the rooms have been previously filled with furniture etc. My...
  9. La Poste

    Insulation resistance of ring, 2391 question again!!

    Howdy folks. I am working my way through loads of past test papers at the moment in preparation for my July exam. I have been asked to insulation test a ring that has been properly isolated. The way I have always insulation tested rings is to remove line, neutral and CPC conductors from the...
  10. S

    HELP !! with Insulation resistance test on ring and lighting circuit

    just trying to builded up my confidence, am going to do an insulation resistance test on my ring and the lighting cicuit, but on the ring their are build-in appliances eg. fridge,wash machine,hob and electric heater that cant pluged out. and the light their are two dimmer and 14 spotlight,how s...
  11. N

    Fluke Insulation Resistance No Reading

    Hi, I was wondering if anyone has come across this before. I was doing an insulation resistance test on a property practising for my periodic exam. I set the tester to 250v because I couldn't remove all equipment, when I went to test across the live conductors and CPC I didn't get a reading and...
  12. A

    Failing insulation resistance

    I went to quote on a simple job today. Some old by is buying a new cooker and wants the wiring ready. I carefully pulled out the old cooker to see what was behind and all there is behind is a 10mm cable coming out of the wall. I recommended to fit a proper cooker connection point, Sink the...
  13. L

    Testing insulation resistance

    Could anyone explain this test from start to finish? I.e .....lamp removal......fuse spares, ring final etc? Also do you do the tails?
  14. F

    Isolating for Insulation Resistance

    Hi all, is it sufficient to turn off the switch to the boiler when doing an IR test? I thought only double pole switches would isolate both phase and neutral and a boiler ran off a fused spur isn't double pole? Dimmer switches you disconnect and join phase and neutral, do you do this at the...
  15. T

    array insulation resistance

    does anyone understand that dti guide. itsays to do test [ir] on array cables. how can this be acheived during daylight. also if not earthing array frame if using isolating transformer inverter with tncs do you probe earth on ac isolator switch for pos-earth neg-earth on test.comments welcome.
  16. T

    solar pv insulation resistance test

    anyone done this test the dti guide is not clear on this how can it be done during daylight. any advise would be appreciated.
  17. S

    insulation resistance

    carried out an IR test on a lighting circuit, the E to N was 299, E to L was 299 but N to L was 0.03, only had time to complete that test while doing other work, going back tomorrow. Any suggestions on what it could be would be apreciated. The 1.5m t&e looked in god condition in attic.
  18. S

    Insulation resistance

    Hi just finnished installing 5 rcd sockets all rcd sockets are off, started my insulation resistance test, all sockets are conected and its disconected from the fuse board, got 500 m ohms from earth to neutral, 500 m ohms from earth to live, but when i test live to neutral i get a reading of...

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