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mcb

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  1. V

    Shower tripping mcb after being used

    Hello. Can anybody please help. I've been in my house for 5 years and had no trouble with shower at all. A couple of weeks ago the wife says that shower wasn't working. I looked at circuit board and mcb had tripped. Flicked switch back on and everything was ok. Went for a shower later and its...
  2. J

    Living Room MCB breaker tripping

    Hi, The breaker for my living room has been tripping since Sunday. I have physically checked all the wiring in the sockets and they all seemed fine. I then checked them all with a socket tester and the read was fine. I have used all of the appliances on a different circuit and they are all...
  3. B

    Ground floor lighting trips out mcb

    Hi everyone, My first post but straight in with a couple of issues. I'll start with a 6amp MCB that keeps tripping out relating to ground floor lights. For your info: There is 10 x 3w led recessed lights in Kitchen, 8 x 3w led recessed lights ,plus a main central Led light (approx 100watt...
  4. S

    Lighting MCB keeps tripping

    Hi all. Just after a bit of advice. Just got home on Christmas Eve, went to put the lights on as you do, then there was a "pop" from the MCB. Usually when this happens one of the halogen bulbs in the bathroom has gone and needs replacing. Usually resetting the MCB, identifying the blown bulb...
  5. D

    8.5kw shower on a 32amp mcb

    Hello All Can any one provide non sarcastic suggestions as to why an 8.5kw shower has not tripped the 32amp mcb protecting that circuit? Found this install in a domestic property. It seems to have been there for years, without out issue. Thanks DD
  6. Spark40

    Schneider Electric Acti 9 iC60L MCB Mini Circuit Breaker 4P, 40 A, 10 kA, Curve C

    i have being using my multometer 4023 model on my mcb and its reading 309.3A but to my calculations it should be below 4 amperos can anyone lend me a 320A fuse would be delightful
  7. B

    MCB tripping intermittently

    new build house 3 years old Cold water supply comes into the house at the kitchen When turning the mixer tap on in the kitchen it sometimes trips the water pump, it does not trip the pump from any other point in the house either mixer or single tap. I have changed the pressure reducing...
  8. DRM

    Spotlights tripping MCB when switched on

    Hello, my mate’s asked me to look at his spotlights in the kitchen because they were temperamental for a few months going off for hours at a time then coming back on and now they just trip the MCB as soon as switched on. They’re 12v spots. They were on a dimmer switch so I changed that first to...
  9. M

    Mcb trips but tests clear

    Evening all Let’s see if anyone can solve this one. Recently wired a new extension. Today connected up ring circuit to 32amp mcb, all relevant dead testing done ir +999mohms and ring continuity.28 .28 .48. So all good turn mcb on and pop it trips off. Rechecked testing removed sockets just to...
  10. LewisM

    6A MCB Tripping on Earth Fault Loop Impedance Test

    Hi, just finished a partial rewire at my sisters house and when testing the two lighting circuits (up&down) the 6AMCB trips for both circuits individually, I thought the MCBs might just be sensitive to the test but the smoke alarm circuit also 6A is fine when testing, R1+R2 and IR test all fine...
  11. Marcus Vaughan

    Square D MCB to RCBO

    Hi All, I have just been to to view a job on my way home. The customer is asking for a new double socket immediately below the consumer unit (that's convenient!). It's an old Square D board without an RCD in sight. I guess it would be very easy to install an RCD socket outlet - spurring from...
  12. B

    MCB rating advice is appreciated.

    Just a quick question got a new boiler going in soon and noticed that the MCB that will be used for the dedicated feed ( on kitchen ring ATM ) is 16amp is this correct rated MCB? or does this need replacing with a 6amp MCB with a 3amp fuse at spurr? Cheers
  13. S

    Two 'Circuits' in one MCB

    Can't find the recent thread about this, but I've been looking at smoke detectors and got this from AICO under System Installation: "• The supply for the mains powered alarms shall be taken from an electrically protected, regularly used local lighting circuit at the nearest source except for...
  14. cliffed

    Led street lights tripping mcb

    Just had a quick look at a job,intermittent tripping of 10 amp mcb,retrofit led replacing discharge lighting,some time ago. There are 7 street lights,couldn’t real do too much investigation,rain stopped play. Did a IR test proved to be satisfactory,just wondering if any of you guys Had any...
  15. B

    RCBO Replacement under 18th Edition

    Hi, Complete laymen to the electrical world so need some advice. We had a complete rewire done in 2016 and as part of this we had an RCBO unit put in. Today we have had an issue where there has been a loose connection and the board needs replacing. This is being done under our house cover but...

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