1. S

    High no trip earth loop readings

    Hi, I'm buying a new test kit and was wondering if anyone had a problem with non trip earth loop readings? This was taken on the same installation- new mk sentry split load rccb CU. I've got a secondhand, calibrated megger 1711 MFT which I've taken readings on a ring = 1.04 ohms And...
  2. E

    Load on non RCD side, causes RCD trip

    Hi Looking for advice on a intermittent fault. New dishwasher is causing RCD to trip (happened with two new dishwashers - supplier changed it for me). Thinking therefore it was an issue with the ring main, I plugged it into the cooker socket but it still trips at some point during the...
  3. C

    UK RCD adaptor issue

    I am seeking professional advice. I have no electrical qualifications. On the last 2 occasions I have cut my lawn the RCD adaptor did not trip BUT when I disconnected the mower the RCD was completely dead (ie would not reset nor test nor allow power to any device) . On the second occasion I...
  4. B

    Hot Tub GFCI troubleshooting

    I am the homeowner of a hot tub that's been working for well for 6 years. One day the water began to provide a shocking sensation which would prevent you from putting your finger fully into the water. I determined the shock was coming from a 12V light mounted in the tub whose water seal had...
  5. N

    Hi All, looking fo some support/ guidance with my solar PV causing my main CU RCD to trip randomly.

    First post on any kind of forum so please be gentle with me!! I moved into this house a couple of months ago and the vendor had a solar PV installed 5 years ago now. Recently I have had random tripping of my main RCD for what I believe to be a result of the Solar PV. I’ve attached a couple of...
  6. T

    Is what I've done any good/safe?

    Hi everyone, I've come here as a DIYer asking for professional advice/opinion. I have an 8.5KW shower on a 6mm cable and a 40amp MCB. The shower works fine........for about 8 minutes! It invariably trips out. Sometimes it lasts 6 minutes, sometimes it lasts 10. I was considering changing the...
  7. T

    Fusebox RCBO trip / ramp

    Fitting a new CU today (domestic TT) and using "Fusebox" for the first time - 14 way Type A RCBO board, 9 ways used 5 spare. All good until testing RCBO trip times - 7 test perfect, but 2 (both 6A) tripping during half test, 1 @ 0 the other @ 180. All loads disconnected, tested again, same...
  8. J

    Domestic Selecting which breaker trips first by trip curve

    Hello i'm in the EU and i will be getting 230v 40A service in my holiday house (previously was 3ph) My issue is that the mains come in at the pole just outside the property and i'm required to have a 40A breaker there (so far so good) The wire then comes to my house which is about 70 yards away...
  9. EastCoastPete

    Domestic Pool Pump intermittent RCBO trip

    Hello All, Am checking a fault on someone elses install which is about 18 months old. Customer says it starts and operates ok then he stops to take a break ( it's a small pool with pumped flow to swim against), then tries to restart and the RCBO goes. So, I know it's hot when it happens but...
  10. FatAlan

    The question is...are Wagos usable after at trip through the washing machine?

    As title. Based on wagos recovered from my washing machine. :)
  11. Z

    UK Kitchen socket trip switch keeps triggering RCD even when nothing is plugged in.

    Hello & Merry Christmas, Last week when waking up the lights and sockets in the bedrooms upstairs were off, along with the ground floor kitchen sockets. Flipping the RCD, and the trip switch for the kichen sockets and upstairs lights seemed to work fine - we have no new appliance installed or...
  12. S

    Havin random breaker fault issues with my home where random circuits trip breaker with no pattern .

    So bought my house in june . When i moved in I hooked ac window unit in my bedroom it tripped the afci breaker for that circuit so I temporarily ran extension cord from spare room to my bedroom to solve the issue . After a week i decided to try hook ac up normally again . Never tripped breaker...
  13. M

    RCBO trip.

    Got a large rewire ongoing at the minute. Owner wants to use current sockets alongside the new board as he’s living in one part of the house whilst the builders are in. Today the old supply was disconnected and whilst cutting through an old cable not connected to any of my new legs the RCBO...
  14. B

    Rcd trip times help

    Hi have 60947-2 Main Switch with added 61008 with settings for mA and mS, now come to test and it’s set on 300mA with delay of 0.5 so 500ms, now what I’m wanting to know is: 500ms is the maximum tripping time for a S type RCD, so what’s the point in having more settings as this has a variable...
  15. B

    RCD trip times

    Hi have 60947-2 Main Switch with added 61008 with settings for mA and mS, now come to test and it’s set on 300mA with delay of 0.5 so 500ms, now what I’m wanting to know is: 500ms is the maximum tripping time for a S type RCD, so what’s the point in having more settings as this has a variable...
  16. C

    RCD trip time

    What are the required RCD trip time requirements? And what do you typically see in the real world?
  17. E

    Why would the Main breaker trip?

    I recently installed a photovoltaic solar system for a customer but there seems to be a problem with on of the breakers. Here is a bit of context: The panelboard is a 100A main/125A bus 3ph 480V. The sum of the breakers is 120A (30,30,30,15,15) and each breaker is connected to an inverter. What...
  18. B

    UK Oven trip MCB

    Hi all, I’m hoping someone will be able to give me some advice on my oven. Tonight I had both ovens on (as has been done on several occasions). When I went into the kitchen about 10 minutes later I noticed the oven was off and had tripped the 32Amp MCB. I reset it at the CU and it came back on...
  19. M

    Outside Lights trip RCD

    Hi All, I was wondering if anyone could help me with a recent problem I’ve had on a job. About 5 months ago I installed about 5 outdoor soffit lights from switch inside. All worked perfectly and customer was happy. I’ve recently been called back to the job as the outdoor lights have been...
  20. B

    UK RCD vs MCB trip

    Evening everybody, I’m wondering if someone wouldn’t mind answering a question for me about RCDs. I had a water pipe burst behind my washing machine this evening, and once I’d isolated the leak I noticed the sockets had tripped. When I went to reset the breaker, I noticed that it was the RCD...
  21. K

    Protection against open/loose neutral?

    Hello friends, is there such a thing as a "smart meter" that I can install on my backwoods house that will trip if it detects a loose/open neutral? If so, where can I get one? Thanks very much
  22. N

    Why would spike lights trip an MCB as if a dead short is present ?

    Just finished installing 20 x spike lights in a customers front garden. 2.5mm SWA ran from existing junction box feeding existing fence lights. All pulling no where near 1A in total. When all connected and wiring tested, went to switch on MCB and it popped. Rendering the MCB useless as if L-N...
  23. RutlandFox

    Modern wiring help rcd trip

    Hi all. Newbie please be gentle... My daughter in law moved into a new [2007] build. All socket circuits 20A radial MCB. One socket circuit trips rcd intermittently when the Wi-Fi router psu plugged in. Psu is double insulated and pat tests ok. Radial tests out ok with 50M ohm at 500v. Nothing...
  24. M

    Intermittent mcb trip electric gate

    Hi, just registered, I qualified in 1973 and and not done much electical work for the past 30 odd years but I obviously have grasp of the theory. I have an intermittent mcb tripping on my electric gate, which I installed. (All electric no hydraulics) The mcb will trip in any weather...
  25. J

    Am I liable to pay

    I rent a property in the UK. All of the sockets in my house were tripping, even when all sockets were switched off. An electrician came out, sent by the estate agent who manages the property. They determined it was an appliance of mine that tripped the power. He said something about why the...
  26. B

    RCD trip time greater than 300ms

    Got sent this, RCD Failed x1 greater than 300ms maybe if they changed the supply at top of RCD, currently have neutral on the left and line in the right , also the RCD is fed from 63Amp MCB is that all good just feeding an RCBO 30ma board
  27. M

    Square D rcd wont trip with my tester

    Hi guys wondering If anyone can shed some light either through knowledge or experience of the same problem. I have a Megger MFT 1731. Whenever I come to square D type rcds my tester doesn't trip them. I try it on doing the manual settings for 1x and 5x and even the auto. Ramp tests won't...
  28. B

    RCD won’t trip help needed

    TT system, have upfront 60947-2 with added on 61008 with mA and ms settings, now I’m getting Zdb of 22.9 ohms and Ka of 4.0, now the RCD can be what ever I set it to but I’m struggling, I’ve set it to 300ma and 300ms but can’t seem to get it to trip? I also have a split phase supply so have L1...
  29. spud1

    Can I calculate how fast an RCD should trip?

    Hi all. Been bugging me. I think there is a way to calculate how fast a particularly rated RCD should trip (rather than measuring) but I can't remember how to do it ? e. g. If I was designing an SWA submain fed from a TT earthed installation and I needed to install say a 300mA TD RCD to...
  30. A

    difference between zi no trip and zi trip

    hi everyone, i have just got the fluke 1664fc can somone please tell me the difference between a zi no trip test and a zi trip test. i know that it in zi trip it is a high current test but still i can not understand why im getting different readings between live and earth. Thanks
  31. S

    Well, that was a short trip

    Just back from Nairobi errr business trip cut short, looking at my "holiday" vids I need to loose a bit of weight........ anyways got to sort out my holiday cleaning...... sand gets everywhere,
  32. spud1

    Which RCD trip time to record?

    Afternoon all, As we all know the new 18th certs only have the facility to record the x1 trip time of a circuits RCD in the test results page. They've got rid of the x5 column for some reason!? NICEIC are recommending that where the RCD is being used for additional protection the x5 reading...
  33. T

    Board change (RCBOs) Lights trip sockets

    Evening all, I changed a board today in a ground floor flat. 3 circuits with separate RCBOs (Shower 40A, sockets 32A, and Lights 6A) Switching on any light switch causes the both RCBOs for the lights and sockets to trip. Insulation resistance results are in the 100s between conductors on...
  34. P

    Led strip light off, kitchen cabinets

    hi there, If anyone could help. We have blue led strip lighting under and over our kitchen cabinets, after a few days of moving in some of the lighting went off. I’ve looked under the cabinet and found the attached photo. 1) I it wired properly? 2) how comes the yellow and green wire is...
  35. G

    Breaker trip after screwing light fitting back to freshly painted ceiling

    Hi, This afternoon, finished re-emulsioning a plasterboard ceiling in a 25-y-o house (so the electrics are modern enough). I had removed a circular metal light fitting - the swivel 3-spotlight type of thing - but it uses modern LED bulbs. Never ever had a problem with it. The wiring is solidly...
  36. R

    Electrician RCBO trip test query - Testing wrong or is there a fault?

    Hi, Can anyone please explain why my friend's 30mA trip RCBOs passes the trip test (e.g. x5 is less than 40ms) when the test is done at the consumer unit but fails when the test is done at the sockets. Is he doing something wrong or is there a fault somewhere (the RCBO or the circuit...
  37. S

    Washing machine trip the breaker.

    When my washing machine (7 year old ) was running yesterday it trip the breaker ( that one ,first on the left , RCD i guess?!) and no power in home. We reset the trip and the same happened twice more (took me a ittle while to realise it was the washing machine!). The socket is OK, and I presume...
  38. Marti

    Random RCD trip & interconnected circuits. Suggestions appreciated.

    Hi There, I was called out to a house RCD trip which would not reset. An old style 10 way split board with a single 30 ma RCD (half without RCD protection). RCD checks out fine but I found a faulty chandelier & replaced it with a single bulb for now. Also a faulty 12v transformer flickering; now...
  39. Tallman

    Domestic Spur circuit cutting out then restoring - no RCD trip

    This is a new one to me.. a small spur circuit (3 double sockets) on ground floor, several small load items connected - table lamp, assorted AV kit (TV, Amp, DVD). On just these 3 sockets only, the power cuts, sometimes flicking on - off - on again. Other times it'll stay off for 1-3 minutes...
  40. A

    Fault finding an intermittent RCD trip

    Hey all, really hopping someone will be able to help me with my issue. This problem relates to my personal home, but i can't seem to figure out the issue. Quick background. The main switchboard at my house feeds into a sub-board in my shed. This sub-board then feeds into another sub-board which...
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