Posting a message to the forum will remove the above advertisement
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. angel While you're here, would you mind checking out our Electrician's Insurance section to see if we could save you a few quid? - Specifically our Van Insurance Deals and Public Liability Insurance Deals. Thanks for supporting the forum! angel

    5% Discount from Electrical2Go.co.uk for ALL members! - Click Here

  3. Forum for Trainees.

    If you are a trainee and haven’t already applied to join our trainee forum then click HERE The trainee forum is a closed area of the forum where the Forum Mentors will freely share their vast experience within the industry. 

    Dismiss Notice

Discuss electric testing in the Periodic Inspection Reporting & Certification area at ElectrciansForums.co.uk.

Thread Status:
Not open for further replies.
Please make sure you checkout our forum sponsors, many do discounts for members and, they keep the forum free to use.
  1. werner starbuck
    Offline

    werner starbuck Guest

    [h=1]Identify one item that needs to be disconnected prior to carrying out insulation resistance tests?[/h]here is another question that i'm not sure about. you can't disconnect the main earth as it is the resistance your testing, or ami wrong here.
     
  2. brman
    Offline

    brman Guest

    Given the wording I assume this is a 2391/5 question. So you are doing a full L-N, L-CPC, N-CPC test?

    You need to think about what would happen to equipment connected to the circuit. Both in terms of how it might affect the result and what 500V might do to equipment.
     
  3. malcolmsanford
    Offline

    malcolmsanford Electrician's Arms


    Why are you shouting?
     
  4. tony mc
    Offline

    tony mc Electrician's Arms

    Have another good look at GN3 and then you will get it clear in your own mind !!
     
  5. MarkieSparkie
    Offline

    MarkieSparkie Guest

    Insulation Resistance test blew-up his hearing aid!:lol:
     
    • Like Like x 4
  6. werner starbuck
    Offline

    werner starbuck Guest

    there are only four possible answers to the question.
    1 sockets
    2 switches
    3 lamps
    4 main earth

    i have researched through all the study material and the only possible answer i can find is in the inspection and testing manual p74 411.3.11 onwards. it states that: 'insulation resistance tests should be made on electrically isolated circuits with any electronic equipment which might be damaged by applicationof the test voltage disconnected or only a measure to protective earth, with the line and neutral connected together.'

    so based on this i think it should be lamps.
     
  7. malcolmsanford
    Offline

    malcolmsanford Electrician's Arms

    Your getting there son ............... now think what also could be on, lets say a light circuit that could be damaged by an IR test
     
  8. werner starbuck
    Offline

    werner starbuck Guest

    thanks for your help on this. i think i have it. if the sockets are disconnected and the switches on you would eb able to carry out the ir test without the risk of damaging any vunarable equipment.
     
  9. telectrix
    Online

    telectrix Scouser and Proud of It Respected Member

    Location:
    cheshire/staffordshire
    Business Name:
    Telectrix
    not only plug in equipment , but as malc. has said, any lighting with electronics, ballasts etc., can be damaged. if in doubt, link L to N and test to E.
     
  10. i=p/u
    Offline

    i=p/u Electrician's Arms

    and reduce to 250vdc for method 2
     
  11. trev
    Offline

    trev Regular EF Member

    Smoke alarms sometimes don't like 500V up em.
     
  12. tony mc
    Offline

    tony mc Electrician's Arms

    250 v method 2 ?
     
  13. i=p/u
    Offline

    i=p/u Electrician's Arms

    ok talking poo, i knew somone was talking/telling me poo when saying that other night... he must of been looking at selv or something... forgive my blunder
     
    • Like Like x 1
Loading...
Similar Threads - electric testing Forum Date
Testing electrical socket Electrical Forum Oct 8, 2018
Industrial electric powered heaters Industrial Electrician Talk Yesterday at 5:33 PM
Thread Status:
Not open for further replies.

Share This Page

Electricians Directory Post a Domestic Job Post a Commercial Job