sequence

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  1. timhoward

    Curious sequence of events

    1 - Major supply fault, details unknown. By time I get there DNO already put in genny and are digging up road. 2 - Reason for call, heating not working. I find Horstmann heating controller and Glow-worm boiler completely non functional, I bypass controller and change 630ma fuse on boiler PCB and...
  2. M

    voltage tester show sequence of lights.

    After some advice please, I`m gas safe registered and have to do safe isolation to TB118. It`s a new build site and the fast blow fuses were blowing on the boiler; the spark said it was a problem with the boiler. Put a temp on the boiler and it works. On doing a dead test on earth to live on the...
  3. wsoppitt

    What sequence to identify intermittent fault causing rcd to trip .

    Guys / Girls. How do you tackle an intermittant fault that only occurs once or twice every few weeks. What is the sequence you would use to identify and locate the issue.
  4. mak

    Sequence of tests in guidance note 3 (initial verification)

    How come the sequence of tests in guidance note 3 is that the Zs test comes before the PFC test? Isn't it normal to do PFC test before the Zs test? Because then you can do your PFC test, put the board cover on and energize the board without coming back to do the PFC test.
  5. M

    UK What sequence to do when doing fault finding (AM2)

    Hi everyone just to let everyone know that I did my AM2 last week and I only failed on the fault finding part. I was very confident before going into the fault finding test but I lost my way and the pressure got to me. I'm so chuffed that I pass everything else. Just to explain what the test...
    • Mustard85
    • Thread
    • am2 am2 fault finding and/or testing doing fault fault finding finding sequence
    • Replies: 20
    • Forum: UK Electrical Forum
  6. GBDamo

    sequence of events help required.

    I highlighted the condition of an installation several months ago to a client. In short there is a basement which is very wet and the board holding the cut outs and switch fuses is rotten, and now starting to collapse.There are a TP mains cut out, SP mains cut out, isolators for both and switch...
  7. 1

    2391-52 practical assessment - testing sequence

    Hi guys, i have my 2391-52 practical assessment tomorrow and my assessor has said we have to perform the tests in sequence as stated in gn3 - 2.6.4 Few questions i have are: Once i complete safe isolation procedure and remove cover first up is continuity of protective conductors, surely it's a...
  8. B

    what is the correct sequence for locating faults?

    i'm a bit confused with this question, it doesn't state what kind of fault so the question is open to a broad spectrum, i'm aware the first point is speak to relevant people regarding faults but after that it could go so many ways. am i missing something here? i'm reading through the nvq3...
  9. A

    Help with 2395

    hello all, Failed my 2395 written exam and from wanted help understanding the following questions that came up State two reasons why it is important that the phase sequence is confirmed throughout the installation? State two methods to confirm phase sequence with an installation? The...
    • Amars
    • Thread
    • answers installation phase sequence tests
    • Replies: 14
    • Forum: UK Electrical Forum
  10. AyresomeBoro

    2395 Written (Typed) Exam

    Anyone else waiting on results back from a recent 2395 exam? I done it 2 weeks ago and should find out how I done tomorrow. I feel I lost a whole chunk of marks on two questions based on: 1) Earth rod resistance testing 2) Phase sequence testing Naively neglected these topics during revision...
  11. D

    Sequence lighting

    Hello everyone. Has anyone installed sequence lighting before? Im not actually sure that this is the term for it but basically my client wants her driveway lights to light one after the other. So when she comes to the beginning of the driveway the first bank will light up then the next and so...
  12. A

    Phase sequence test

    Hi, Could any one please help me with the following questions: a) A test is to be carried out to confirm the correct phase sequence throughout the installation. i) State three points on the installation where the phase sequence must be confirmed to show that the correct phase...
  13. C

    what sequence to install Trefoil cables underground

    We are to install 2 x 630mm single XLPE CU cables per phase + 1 x 630mm for the neutral can anyone lay their hands on the what sequence to install Trefoil cables direct underground as a official PDF please as we are having a debate at work and its been years since I had to do this. I think its...
    • cobrauk
    • Thread
    • cables install sequence underground
    • Replies: 14
    • Forum: UK Electrical Forum
  14. J

    Test and Inspect sequence

    Hi still a new boy here Just setting out on my own Having just bought a tester metrel MI3125 Lite (what do you think to them) I have been wondering the right sequence do the testing is crippler still right ?? Ill be testing just domestic at the min Thanks Jim
  15. P

    Initial sequence

    Hi. Could someone tell me after Ze test is it then Pfc test with Zs after this is how my tutor says it is because the cover is already off after doing Ze so then do Pfc test and put the cover of CU back on and perform Zs. But in GN3 it says earth fault loop impedance which I assume is both Ze...
  16. T

    Query regarding old 2391 question - RE sequence of tests

    Hi, I've been having a nose through some of the old past Chief Examiner reports and the December 2011 edition has on page 5 has the following quote: Can anyone explain why Continuity of CPC is not the first test? Is it purely because if you get an end to end reading on the CPC then that is...
  17. Baker1988

    sequence of tests

    Hi i am doing some college home work (which i am fine with) its to do with the sequence of tests and i have been looking in guidance note 3 and in 2.7.4 is the sequence of tests but can i ask who does "f" 'insulation resistance of non conducting walls and floors' i ave never heard of this before...
  18. H

    Sequence of testing in BS7671?

    Can anybody tell me the sequence of testing that's stated in BS7671? At college I've been taught CRIPES, which is: Continuity Ring final continuity Insulation resistance Polarity Earth loop impedance (functional) Switching Why are these carried out in this specific order?
  19. G

    Sequence of testing

    Afternoon all, i was wondering if any of you could help me with this question.. Why must testing be done in sequence?
  20. P

    three phase sequence testing

    Hi guys, as the title suggests just trying to get my head round three phase sequence testing, if I understand it correctly this is confirm that the three phases are in sequence.....obviously :) Now as I understand it this is obviously a live test and a three test leads are connected to L1 L2 L3...
    • Pondy
    • Thread
    • connected leads obviously phase sequence testing three three phase
    • Replies: 12
    • Forum: UK Electrical Forum

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