fault

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  1. mak

    AM2 ring fault-finding headache

    How would I pinpoint a fault on a ring circuit with very little resistances, and without any visual clues, only by measuring. Say I have a break in neutral between db and first socket. How would I go about fault finding it? 1. I will use low resistance ohmmeter. 2. I will find that rn is not a...
  2. mak

    Is there a max Zs for lighting circuits?

    I can't find anything related to this in the regs so I probably misunderstood the question. The way I see it the max Zs for any lighting circuit depends on the circuit breaker for that circuit. Say we have a lighting circuit with 100x36W ceiling lights which gives us a load of 16A, we choose the...
    • mak
    • Thread
    • circuit circuits confused earth fault impedance lighting loop loop impedance max radial types
    • Replies: 7
    • Forum: UK Electrical Forum
  3. B

    Solar PV insulation fault ABB aurora inverter.

    Hi guys, I am new to the forum so be nice! I used to install solar PV systems back when the tariffs were still good, and I've never had to go back to one of my old installs because of a fault, so I'm not too clued up with regards to fault finding on PV. A customer has recently called me out to...
  4. OnlQQker

    ***URGENT*** Cosyspa (brand new) Serious fault, Advice Welcomed

    Where I'm staying at the moment, the lady ordered a cozyspa. Anyway after a day of it being plugged in the plug melted and filled the house with smoke. You'll see from the pictures the damage caused. Approx 15 minutes after it happening the company rang up and said not to plug it in and a new...
  5. M

    Guidence on some fault finding for am2 please

    Guidence on fault finding am2 please
  6. littlespark

    Most obvious fault here

    First of all, sorry I didn’t take more photos. Been to a customer to price a job and had a look at his CU. Split RCD half and half. From this picture, it appears the left hand side rcd is off, although all the circuits are powered. so. First thought, faulty rcd. Says it’s off but contacts...
  7. S

    Earth Fault at 240V Single Phase System

    Hi... I am Shamsul from Malaysia I have a question regarding to earth fault current if occur inside 240V single phase customer house/building 1.May explain how the earth fault current flow route 2.If got local earthing was connected from ground to 11kV 3phase DEAD line, is it the fault current...
  8. jackhammerJIM

    UPS Fault

    Good evening all . I am hoping someone can shed some light on a reoccurring problem in a mains room we are working in . The problem being the UPS modules display a general wiring fault whenever the ATS switches from generator back to mains . So far the UPS manufacturer and generator company...
  9. B

    High Zs RCD for fault protection?

    Hi, kind of follow on from my last post, but my boss hasn’t explained very well hoping you guys can High Zs on circuit, Can you reply on an RCD for fault protection? He’s told me if the circuit is RCD then you can use that as fault protection, obviously you can’t meet disconnection times for...
  10. E

    UK Puzzled by electrician comments about earth fault.

    Hi, Our house has just had an electrical safety check by a qualified electrician. He said he had found an earth fault but was called away on another job and can't return for three weeks. Meantime, I am left wondering about his comments and would like to get a better understanding. He said we...
  11. bigspark17

    Submain rcd fault protection

    If a 2 core swa was run for a submain to an outbuilding with no extraneous parts in it, but the zdb reading was well over the maximum earth fault loop impedance. Could an rcd time delay be installed at supply end to cover the submain ie increasing its new maximum zs reading? Hope thats clear ?
  12. C

    Fault finding ring final RCBO

    Done a condition report on a old mains board, everything good apart from ring final, got 0.55 nn 33.7ll and 3.8 on ee, changed board to main switch and rcbos, carried out a full accessory swap on all sockets and fuse spares in house, found some bad practice, twisted lives, n and earth's, no...
  13. B

    Control Circuit Fault Finding

    I spent 22 years in the RAF as a ground electrician. Essentially there are about 3000 different types of ground equipment used to keep aircraft and airfields running ranging from specialist fire engines designed exclusively for the RAF, hydraulic rigs and specialist 200v/400Hz generators to run...
  14. Gnasher

    Texecom Premier Elite. EXP 1,1 tamper fault.

    Good morning. Fitted a texecom premie4 elite 64W over the weekend. Only one problem and that is I have a EXP 1,1 Tamper fault that I am unable to clear. Looking on various sites it points towards the commissioning jumper still being in the commissioning position. Checked this and the jumper...
  15. E

    FAULT FINDING

    ok, iv a domestic house with a shed 50 mtrs away supplied via 3x10 SWA on a B32A MCB. fault has been occurring the last few days which is the MCB in house tripping. I arrive and open both boards and remove both PE and N conductors from terminals followed by IR testing and was getting very poor...
  16. I

    Lighting circuit fault

    Hi All, I've been doing first fix for bathroom (spotlights, towel heater, underfloor heating, fan, shaver socket). Fuseboard is quite old no RCD, I've convinced costumer to upgrade it. During my work I've checked voltage in bathroom light circuit and I had this: L to N 240v, L to E 60v, N to E...
  17. A

    Megger fault codes

    Does anyone know what the code erp is on a Megger 1721 ?
  18. J

    Calculating Fault Current...

    Hi all, quick question, hoping an easy one to answer. Just need to clarify this up in my own head. When calculating fault current from Zs, do I take Cmin into account? For example. Zs is 0.54 ohms So to find fault current I would calculate nominal voltage / Zs So 230 / 0.54 But, should I...
  19. D

    Megger pat 150r and a fault code of err 8000 2030

    Hi there all I’ve got a Megger 150r pat tester and it’s stuck on an error code err 8000 2030 And no we’re is open to get it looked at Can anybody help as can’t seem to find fault codes on net Regards Dave
  20. R

    Outdoor t&e - EICR fault code?

    Hi all The subject says it all - there's a lot of outside exposed clipped t&e out there with all the attendant physical protection and UV issues. Question is - should it have a fault code on a report? I guess it would be a C3 at most, but should it feature at all? Cheers

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