fault

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  1. 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...
  2. 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...
  3. 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"?
  4. 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...
    • Rarbur
    • Thread
    • ausie elec circuit fault lighting lighting circuit mcb rcd trips
    • Replies: 6
    • Forum: Australia
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. _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...
    • _KaCe_
    • Thread
    • breaker circuit circuit breaker fault ground keeps testing tripping trouble
    • Replies: 3
    • Forum: DIY Electrical Advice
  14. A

    Led strip light fault

    Hi Guys I've fitted 12m of LED strip light 9.6watt/meter which equates to 115w. I've used a 150w driver. The lights where checked before and after fitted OK but had not been on for a long period of time. They seem to be turning off by itself now having been left on for a longer time. If I turn...
  15. T

    Fault finding with a multimeter

    Hi, I’m just wondering what sort of readings I can expect for faults on a multimeter? I’ve only ever used a multifunction tester. What readings can I expect for a short cct fault or a polarity fault? I know that open cct will be 0L/1, cheers
  16. goodwell

    Riso fault Power-One Aurora

    I have a small Pv farm 5KW. Some months ago inverter started to measure low Riso<1MΩhm (0.8). I tried to test each string alone and with one the inverter read good Riso and started normally. The other had very low Riso. I tried to check the two pv strings but both have same Voc 340Volts. So I...
  17. G

    A21 fault on Worcester boiler

    My boiler is still working fine and my new Hive thermostat works manually (just not on the app). The boiler regardless of what’s happening still shows the A21 fault which I believe is an RF signal fault? Any ideas?
  18. C

    Neutral fault with LED light fixtures

    Hi everyone, I'm new to the industry(Qualified a few months ago). I have a client with 6 LED light fixtures on the same circuit/breaker, 3 are working fine and 3 seem to have a neutral fault(230v live to earth,+/-90v neutral to earth and +/-130v live to neutral). The rest of the installation...
  19. The apprentice

    Surge protection/ark fault detection

    Hi there just a few questions I have to do an install of a small ware house that was built in 2021 January (finished) client that is going into the warehouse specialises in laboratory. Now he has a lot of 3 phase machinery like mixers and small hoists which are all 3 phase the building adjacent...
  20. M

    fault on solar panels

    I'm in need of help with my SMA Sunny-Boy solar panels. Model-SB4000TL-20. Fault code-35 Isolation resistance. Only happens when both DC lines are running at once. Left DC running on its own works fine. Right DC running on its own works fine. Both DC running together doesn't work - isolation...

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