readings

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  1. 0

    Zs readings on TT system

    Hi there, In the process of testing a large property. TT system. Ra is 58.4 ohms so all good. But starting to test Zs and getting readings of 0.18 on sockets? Why would this be?
  2. R

    Ze on 3phase industrial?

    Evening guys, I`m working on a small industrial unit at the moment. Most of my work is domestic and have not come across this before when doing commercial or industrial. The main supply is coming up through the floor and into the main 3 phase service head......along with this is what I would say...
    • Ross1
    • Thread
    • 3phase earth earthing industrial insulated readings
    • Replies: 4
    • Forum: UK Electrical Forum
  3. M

    Different continuity R1 and RN readings on ring

    Changing a CCU and reconnecting existing wiring (twin and earth) = did a N - CPC IR test for earth leaks prior to dismantling the old (BS3036) unit for obvious new RCD trips; all ok. However, on ring circuit the continuity end-to-end readings of the R1 and Rn are 0.3 ohms different; 0.41 on...
  4. R

    no cpc continuity on ring final, strange readings !

    Good Evening all, Been at a property today starting intial tests for a board change tommorow. There are two ring circuits, on one of the ring circuits i had an open circuit on the cpc. Live and neutral where fine 0.4/0.4. I started to locate the break by splitting the legs and joining the live...
  5. B

    Rcd

    Just done a eicr on a property,socket outlets on one circuit on rcd testing at 5x is 42ms,what are you meant to do as readings on 1x is within the limits.as the 5x exceed limits.
    • bluecallum
    • Thread
    • circuit getting rcd readings system
    • Replies: 7
    • Forum: UK Electrical Forum
  6. S

    fluke mft

    Forgive me but I can't search existing threads as the app just crashes each time. I'm looking at fluke mft's and would like to know which is best, why and of any issues. I did have one years ago but it did give some odd readings now and then and don't really want that again. Those who can't...
    • sledgehammer
    • Thread
    • can't don't fluke mft quote readings
    • Replies: 6
    • Forum: UK Electrical Forum
  7. S

    ELI on no trip with Megger MFT

    Does anyone have issues with this test and how accurate is a No trip test? I find my readings seem to change a fair bit testing the same circuit a few times. This is using a 1730.
    • Simonslimline
    • Thread
    • firmware megger megger mft mft reading readings times trip version
    • Replies: 20
    • Forum: UK Electrical Forum
  8. B

    Megger 1553

    Hi, I use the megger 1553 tester, Now i have herd that yoiu can get the software that automatically transfers the info onto the certs and then prints.. Anyone use it and if so is it good and how does it work?
  9. O

    Customer dispute with supplier

    So, I've got a customer, who according to their supplier, owes them £1700. Given they use about 7-10 units per day this seems more than a little odd, but the supplier doesn't seem to want to know. They hadn't had an "actual" reading for 2 years, nor had the client given one. So what can they...
    • Octopus
    • Thread
    • actual customer reading readings supplier years
    • Replies: 31
    • Forum: UK Electrical Forum
  10. HappyHippyDad

    Low IR readings on lighting circuit - 0.654 Mohms

    I have spent quite a bit of time today trying to understand why I am only getting 0.654Mohms on the upstairs lighting between Live and neutral (at 250V)!!! L-N 0.654 Mohms N-E 25.11 Mohms L-E 24.7 Mohms I get almost the same when measured at 500V (cant remember exactly but about 0.6Mohms) I...
  11. T

    high Zs on 110v

    hi all, In a bit of a pickle ,got niceic audit imminent ,and i have some exccesive readings from a 110v transformer backed up by 60898 type c 16amps mcb acording to BS7671 pg 61 41.6 max is 0.34 .can change to a type B to get max 0.69. these reading s are from another tester ,who...
  12. B

    r1+r2 readings

    Im sure this has been covered before, but Im after peoples views, I am 100 percent confused by the reg that states zs may be calculated using ze plus r1 r2, but r1 r2 cannot be calculated using zs minus ze, naturally I test my r1 r2 and zs. But once I've tested my zs on a periodic for example I...
  13. cliffed

    rcbos

    like your opinions on this ,jus finished a school extension ,everything fine except a couple of loop impedances readings on lighting circuit.These exceeded the appropriate limits,in the regs.All are protected by rcbo"s 10 amp c type,the electrical engineer wants it corrected to comply to regs.We...
  14. L

    Fault finding questions

    1. I carried out a x1 rcd test on a 30ma rcd and the time came in at 44ms with doesn't comply with the circuit disconnecting by 0.4ms. What is the problem? Old/faulty rcd? X5 was 13ms. 2. Done my continuity test on a ring and all continuity was proved. However my neutrals end to end was 0.61...
  15. G

    Zs Readings from a 20KVA UPS system

    Hi peeps I have been asked to test a 'continuous' 20KVA UPS system. Which means the supply goes through the UPS first, and in effect with loss of power you will have changeover instantly. The consultant has suggested to just get the dead readings, and calculate. Whilst I am happy doing this, I...
  16. V

    Help needed with an RCD question

    Hello again, as usual I need some advice from the learned amongst us. I went to a job today with the customer saying he was reading a book and the RCD tripped. When I got there he had sussed that it was the RFC in his flat and had turned that circuit off. I unplugged all appliances and it was...
    • vickery1971
    • Thread
    • check circuit fault needed question rcd readings
    • Replies: 18
    • Forum: UK Electrical Forum
  17. L

    Megger MFT1553 unusual readings while testing rcbo's

    Hi Guys I'm fresh to the EF had a bit of a bad day, replaced an old wylex Bs3036 consumer unit with a new enclosure with 8 Rcbo's (1 x 40, 4 x 32,1 x 20, 2 x 10 amp) all went in fine all continuity, end to end tests and insulation tests went well, until I started testing the rcbo's using the...
  18. S

    Insulation resistance testing

    Hi all ran a ring circuit for someone about 6 months ago and when I carried out the insulation test my results were around 250 m ohms for l-n and slightly lower for l-e, anyway didn't think anything of it as we had just plastered all the rooms where the ring circuit went. Returned to the same...
  19. A

    Ring Final Circuit Problem

    Hi all hope you can help had a spur to fit on an old ring final circuit today that is made up of the old 3092 and old twin and earth were it has been extended in the past the readings i got end to end L 0.16 N 0.16 E 0.32 added together 0.16+0.32/4 = 0.12 but when i carried out a figure of 8 i...
  20. P

    Confused readings testing TT Ze with fluke 1653

    Afternoon I have a TT earthing system with a 63Amp (30ma)RCD Garage unit. my ze reading earth disconnected is 169 ohms - happy with that falls within range. when i do a 3 lead test on my fluke for pfc gives me 1 A reading - also happy with this ohms reading with 3 test lead is 194 when i do...

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