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trip

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  1. 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...
  2. F

    Random socket tripping

    Hi, Our breaker box is located in the cellar. We experience random socket trips throughout the year. Summertime seems to be the best when we can go months without an issue. Autumn/winter time is awful. We have had 3 trips within the last 24 hours. No new appliance has been switched on when the...
  3. gazdkw82

    RCD trip times (Table 3A)

    I'm trying to find a list of trip times for 30/100/300/500ma rcd devices to make some flash cards. I've found table 3A but it's somewhat confusing. If I read it correct, the table suggests a 30ma rcd should trip at 10ma. I must be reading it wrong? Anyone know how to read the table correctly...
  4. Stephen

    New electric cooker causing power to trip at fuse. The fuse is reluctant to flick back on after.

    Hi all. Thank you all in advance for your help and advice. I was hoping to get some help and advice on a cooker issue I'm experiencing. My cooker is "brand new" and I recently had it installed by my father inlaw (competent tradesman although not an electrician) The cooker is brand new but...
  5. M

    Similar places in two circuits causing trip

    I have two line wires coming out of the top of the 'Sockets' B32 MCB. One of those line wires connects to 3 sockets in the bedroom and the other wire connects to 5 sockets in the living room. Each socket takes two line wires, one to power the socket and the other to pass the current onto the...
  6. M

    Fault finding an intermittent RCD trip.

    Hi all, I’ve had a headache of a fault and can’t think what to do next. The house has an RCD main switch, and I’ve verified the circuit which has the fault to be the kitchen ring final. The RCD has tripped once without interference, and several times when a switched fuse spur is turned on...
  7. T

    BG RCBO ramp test on one of them shows trip at 15ma every other one is 24 ma

    So just did an EICR few problems mostly rectified. Customer wanted new CU so put in BG with RCBO just five circuits. Tests on EICR were fine except for high ohms on Zs for lighting first floor so tracking that down. All RCBO are fine except this one 32a ring final circuit. RFC tests all fine IR...
  8. F

    Newby DIYer, replacement light fittings trip the MCB

    Hi All, absolutely aware of my own limitations as a diy' er and limit myself to replacing fittings rather than new installations. Replaced 4 x 240v GU10 downlighters in the bathroom(ceiling 3m high) and when I turn the light switch on , the MCB trips all lights in the flat. before I replaced...
  9. A

    Shunt trip in a domestic CU? Looking for a complaint way of remotely switching off power

    Hi. A thought of a domestic fire in my house terrifies me, so I installed a really sophisticated fire alarm in my house. This system optionally can even turn off the gas valve (it has a motorized arm which is installed on the main valve) and switch off electricity in case if the fire is detected...
  10. T

    RCBO trip when cabinet lights switch on

    Call out for tripped 20A RCBO on TT system, 3 Halolite T4 fluorescent cabinet lights (class 2) on 3A FCU from radial socket circuit, trips occasionally when lights are switched on. Circuit tested including IR, all results good, RCBO tested including ramp test, all good. Connections checked...
  11. G

    Will a B type 32 trip before a C type 16?

    Morening all, I have a dilema that you may be able to help with. Manufacturers instructions ask for the unit to be fed from a C Type 16Amp MCB. At the moment this is all the technical information I have. In one in twenty cases they experience nuisance tripping and have now recommended fitting...
  12. dnjr

    Timeguard rcd socket won’t trip with tester. Help please

    Dear All Installation tncs. Wyler re-wireable fuses I’ve fitted 2 x timeguard rcd sockets to provide protection for extension leads going outside but neither will trip with my tester. Trip fine on test button Also trip when I do earth loop test ( fluke tester) Socket tester says it’s all ok Zs...
  13. P

    Kewtech kt63 no trip function

    hi whilst testing ELI on lighting circuits, using kewtech kt63 on loop no trip function, test keeps tripping rcd once polarity and voltage is confirmed. I know the kt63 tests at 250v in this mode, but it shouldn’t trip the rcd, anyone else experienced this? Is it calibration time? Is it me? Is...
  14. D

    Both RCD's trip randomly

    Scratching my head a bit on a job today. Been to clients house to investigate fault with installation. For the past few months client has reported that both RCD's on his dual RCD board have tripped at the same time on odd occasions thus losing all power to house. House was rewired by another...
  15. M

    RCD trip across board

    I am a relatively newly qualified electrician and have completed a re-wire but come across a problem i dont understand. I have a dual board with a lighting and a power circuit on each side. On the right side the power and lighting is entirely stable, but whenever a load is applied to the...
  16. Pete999

    One for Gavin, a trip back in time

    Gavin, Milsom Steet, still there I hope. My old Boss when I was a Lad, had the contract to provide Christmas decorations on the shops and businesses on the whole length of the street. Used to string TRS twin from building to building, using ladders, no Cherry pickers in those days, men where men...
  17. D

    Unsure of trip switches on fuse box?

    Hey folks I'm in a bit of a pickle right now, the new house we moved into has this: what is this switch with the FG on it? when I flip it up it just comes back down again, won't stay up.. all the plug sockets in the walls are dead at the moment so I'm guessing this is the key to getting them...
  18. satori

    Turn off hob and both MCB and RCD trip.

    Parents in law are experiencing and intermittent fault. Occasionally, when one of the rings on the hob (I think the hob is of the induction type) is turned off, both the hob MCB and the associated RCD trip. I can't envisage a fault that would trip both. The property is a bungalow that had an...
  19. D

    RCD on TT installations won't trip on x5

    I do a lot of ev charging so do a lot of rod installations. If impedance is over 100 ohms on the rod the RCD will trip on x1 but will not trip on x5. I have tried different RCDs etc but this always seems to be the case....anyone know why this is? The RCDs are type A so DC sensitive..
  20. C

    Finding infrequent RCD trip

    I have a new breaker panel fitted (March), mostly new appliances, and some from an existing house. The house is divided into 2 sections with an RCD for each, each section has a ring main and lighting as well as a couple of other breakers on it. One of the RCDs trips infrequently time between...

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