tripping times

tripping times

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  1. M

    RCD Tripping times question

    A few 30mA RCBO's that i have tested recently are tripping lower at x1 than they are at x5, e.g 13.1 x1 13.8 x5, I know both these results comply but im curious does any one know why the 1 times trip is lower than 5?
  2. cliffed

    Rcd tripping times on EIC

    Testing Rcd trip times would you write down 28.4ms or 28ms If say 28.6 would you write down 29ms.
  3. D

    0.4 seconds or 5 seconds

    Just a quick question. This might sound like a stupid question so apologises. I'm slightly confused with the regs 18th edition when it comes to disconnection times. So I was taught in college that in the 17th edition that when a circuit is less than 32A then the maximum permitted time is 0.4...
  4. D

    UK MCB type confusion.

    I've noticed at my grandparents house that all the MCB's in the consumer unit are all type C, every single one of them. Including the ring final circuits and lighting (there's no fluorescent lights in the house at all). The house isn't that old as well. Maybe about 16 years old. With me being a...
  5. HappyHippyDad

    Tripping times for a 100mA RCD?

    Could anyone confirm if we test 100mA RCD's at x5? There is a lot of information on the web that says you only test at x1 but Table 3a in appendix 3 clearly shows a max disconnection time for a 100mA RCD at x5 to be 40ms. Thanks all.
  6. D

    RCD tripping times exam question

    I sat the 2394 written exam tonight and one of the questions was about testing a 30mA RCD. It asked which tests you would carry out and the permitted tripping times. I answered that at 30mA and 150mA it was equal to or less than 300ms and 40ms respectively. Which I believe to be within those...
  7. J

    Rcbo's tripping times

    I am testing a new build installation of 90 flats all the flats have 1 16a Rcbo when I test the tripping times I get a higher reading at 5x than 1x on all 90 flats they r all wylex can anyone help me on this matter
  8. F

    rcd tripping times

    just a quick one doing some rcd tests today, and at x1 value the tripping time was 46mseconds and at x5 29mseconds now i no that as long as at x5 value is under 40mseconds all is ok just thought the x1 value was a bit high so my question is there a max value for times 1 as i must admit not had...
  9. A

    RCD tripping times at 1x and 5x

    I understand that when carrying out RCD testing an RCD should trip within 300ms at 1x and 40ms at 5x but is it common that on occasions for the RCD to trip quicker at 1x than 5x. I never had it occur personally. I am just looking at some old certs and on some circuits the RCD is tripping...
  10. S

    rcbo tripping times

    Hi all help please,I tested a6 amp rcbo30ma at board with out load connected the rcd results are 310ms at times 1 and 50ms at times5 so I changed it thinking it was faulty tested new 1I fitted got same results I then rcd tested another rcbo in the board another lighting circuit results are fine...
  11. D

    tripping times?

    Can someone tell me the tripping times for a 10ma and 30ma rcd please?
  12. A

    poor rcd tripping times

    Hi all After having the shower circuit upgraded to 10mm cable, new shower and pull switch the tripping times recorded for the existing rcd are as follows. 76ms x1 65ms x1(180) 28.6ms x5 38.3ms x5 (180). These times appear not to meet the standards for the minor works cert and im after...
  13. N

    RCD tripping times, 0.4 or <200 etc.....

    I always been told that an 30m/A RCD should trip within 200m/s (x1) and 40m/s (x5). But something iv never taken much notice of before is on test sheet the maximum disconnection time of a circuit less than 32A is 0.4. So....which is it? within 0.4 or within 200m/s????
  14. S

    Wylex bs 4293 100ma type s RCD Tripping times

    Does anyone know what the tripping times for an Wylex bs 4293 100ma type s RCD are? Ive been searching the net and just keep getting more and more confused about this i know an bs6009/9 should trip within 130ms-500ms but cant make headway for the tripping times for an older bs4293 rcd.
  15. H

    Rcd tripping times/ ramp test

    What tripping time should I expect to be acceptable when doing a ramp test on both 30ma and 100ma rcds. I mean is 70ma tripping time on a 100ma rcd too sensitive?
  16. L

    MEM RCD Tripping Times

    Hi. Should the x1 and x5 RCD tripping time test results for the MEM AM1004M RCD 100A 100mA still be as usual? 0.4s etc... Also if doing a ramp test that should trip in? Finally, as I think the one I tested is faulty, any ideas where I could get another from? Thanks.
  17. C

    'C' Type RCBO Tripping Times

    Hi All, Can you tell me if there is any difference in the allowed tripping times for a 'C' type rcbo instead of a 'B' type??
  18. M

    100ma rcd tripping times please???

    Does anybody know the tripping times for a 100ma 100a rcd, x1 and x5 many thanks for your previous help earliar.......................;)
  19. W

    TT System and 30mA RCD tripping times

    Help! Sorry having a bad day. I understand the concept behind touch contact of 50v and the above 1666 ohms. But when physically testing with 17th ed dilog and testing a TT system 30mA RCD. At 1x and 5X what reading would you see on your meter? or would you just test the mechanical aspect...
  20. A

    RCD Tripping times

    Hi good people am i right in thinking that a 30 ma rcd must trip below 40 ms at 5x not at 1x if i understand what it says in the onsite guide hope you can help

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