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fault

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  1. happysteve

    Omission of fault (and overload) protection for inverter

    I don't "do" solar, but I've been asked to comment on an aspect of a new domestic solar installation by others. There is no overload or fault protection, except for the service cut-out fuse (unknown size, assume 80A). TN-C-S. Installation is as follows (have only seen a photo of part of it...
  2. H

    Possible electric fault following rewire

    Hello all, We've had a rewire and our electrican is currently away on holiday so we're unable to ask them for advice. Please can I ask for your help with the fault. We had a full rewire including new consumer unit in the property and LED downlights installed (integrated slim line led variant)...
  3. S

    PEN Fault Detection on Whole Install?

    Hi All, I understand the requirement for PEN fault detection on EV chargers for TN-C-S installs (or to place an earth rod). However, when I was looking for something else entirely I came across this single-phase 100A PEN fault detector. What would be the use case for this? Would you ever need...
  4. S

    Light circuit fault. 230v on l and n no light working

    Hi There is a lighting circuit fault in a property with the downstairs lighting circuit. I have tested the voltage and there is 230v on both line and neutral conductors going to the light pendnat although the pendant (any pendant) isnt showing light . no changes have been made to the lighting...
  5. MrGwythers

    Ev charger rccb fault

    Hello can anyone shed some light on this fault, we have a supply into 63A 100ma rccbs that feed matte for ev chargers. The rccbs keep losing a phase the first one lost L1 on rccb outgoing side, we've replaced that one now another 3 out of 5 rccb have lost L2 on all 3 faulty rccbs the first rccb...
  6. JimLongDone

    EICR - Shallow Back Box Depth a Fault?

    Hello, My house has 25mm back boxes throughout, but I’ve noticed the previous owner has installed sockets and switches that seem to suggest/specify 35mm minimum. The sockets and switches do still fit flush on the wall, just that it is incredibly tight behind so the wiring has been routed...
  7. L

    Fault finding in FICA test in scotland

    Hi. Im just about to resit my FICA test in edinburgh. Im only resitting the fault diagnosis section. Can anyone who has sat the FICA be able to give me some advice while trying trying to find the faults with the continuity buzzer you get to do it with
  8. Lainan01

    How does fault current loop? "Earth Fault Loop"

    Confused as to what the earth fault loop is. I'm aware it's the path that fault current takes (Line-Earth) but how many times does fault current "loop"?
  9. Rarbur

    Lighting circuit trips RCD but not MCB, can’t find E-N fault

    Long shot but thought I’d try, have a lighting circuit that trips the RCD as soon as the neutral touches the neutral bar for said RCD. Bypass that and it works fine just on an MCB so would think earth-neutral fault, but doing an IR test between N and E shows as a pass (>99M ohm). So unsure of...
  10. CopiamElectrical

    Ring circuit fault, High RN

    Hey there, Sorry I’ve just joined up. I’m a qualified electrician/Electrical engineer. Recently sat my 2391-52. My question is I had a fault which I couldn’t find or rectify during a periodic test that I carried out yesterday (tenant property) occupied. Circuit: Ground Floor Socket 32A...
  11. ADelectrical

    Weird?! Neutral-earth fault

    Hi was recently at a property and was installing a Solar PV system. was doing my testing and i came across a weird result when doing the insulation resistance stage. testing between Neutral and earth I got a dead short. so split the circuit and narrowed it down to a 1ft long length of cable...
  12. K

    Does anyone know what RCD fault he is talking about

    Hi Basically I have visited a youtube link of another electrician and he is talking about how many electricians find RCD fault very hard to resolve and he mentioned it takes less than 3 minutes using the method he mentioned but not completely hence its really puzzling me so if anyone could...
  13. B

    N/E fault IR=0 - RCD won’t hold

    Hi all, After some options/opinions on fault finding N/E fault on ring final as fairly newish to being out alone. Customer wants to upgrade from rewirable CU to RCBO so fairly old wiring but no signs of cable breakdown or anything totally messy on inspection. This circuit basically holds...
  14. M

    N-E fault bank holiday ruined

    Hi all , after some opinions on N-E fault or ring main. After chasing this fault and ruining my bank holiday weekend , ring main IR readings as follows L-E >999 L-N>999 N-E>0.98Mohm I have narrowed it down to a cable spurred from ring main , astonishingly the 3no. Cables in the twin...
  15. Lainan01

    Real life examples of RCD fault

    What’s a real life example of an imbalance between live and neutral? For example, a faulty tumble dryer can trip a RCD on a split board - so I would assume there is an imbalance because of the difference in the magnetic flux between the Live and Neutral coils. But what would be the actual...
  16. J

    Fault finding- AM2S. What is the pass mark for AM2s fault finding

    Fault finding- does any one know how many faults out of seven you need to find to pass the AM2S fault finding section ? any info would be helpful. Thanks
  17. HappyHippyDad

    Is 0.15M ohms N - E a fault on a cooker?

    Further to my other thread about the connected neutral. I have decided to write (politely) to the rather difficult customer and explain that I was right to indicate that the cooker was potentially dangerous. However, I thought I better check to see if it actually is! I found my results and the...
  18. D

    LV fault tripping HV ring main unit

    Hi all, I have been on a site repairing damage caused by travellers collecting copper for the last week. We have found and replaced cabling to get the site up and running. Power has been on for a few days but today the 11KV ring main unit tripped. This feeds a transformer attached to the main...
  19. J

    Reported content: Post in thread 'Domestic - RCD tripping- earth neutral fault'

    Post in thread 'Domestic - RCD tripping- earth neutral fault' by Guest has been reported by Jack898989. Reason given: Content being reported:
  20. _KaCe_

    Trouble shoot why a ground fault circuit breaker keeps tripping.

    I installed outdoor lighting and outlets. I finished this past year. I passed my inspection on April 2022. I was so pleased, BUT now the circuit the outlets are on has a problem... the circuit keeps tripping. Question 1: I was wondering if there's a way to test the circuit breaker itself? Then...

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