mcb

  1. S

    Intermittent lighting mcb triping

    Initially was obviously a hard fault because mcb would not reset. Unscrewed and checked all light switches for obvious fault (some metal) no visual problem, then found possible issue with disconnected wire in ceiling. Rose. Repaired this and initially mcb stayed in. Connected each light switch...
  2. N

    MCB max load for an oven (EICR)

    I want to check the rules when doing an EICR for MCB size for ovens. My mate says i should fail an installation because there is a 40 amp MCB on an oven rather than a 32 amp. Is he right?
  3. M

    MCB Lewden Brand

    Hi Guys, does anyone know the brand for the attached MCB's? Thanks Andy
  4. timhoward

    MCB -> RCBO I'm missing something silly

    Simple job, swap an MCB to an RCBO on a lighting circuit. It's got me totally stumped! IR test L+N -> E is fine on the circuit. So is Zs. All 2-way switches operated. Instant trip when changed to RCBO though, and tried two RCBO's Ramp tested them both, all good. All tests pass on them with no...
  5. M

    UK Electrical PLC Control Panel

    We have a Electrical PLC Control Panel that has to supply 45 Fused Spur units, do I need to protect these with an RCD, we have a 10A Type D MCB at the moment. Each Fused spur controls an electronic Volume/Pressure controller which is rated at 130mA.
    • Mike Cox
    • Thread
    • control electrical fused fused spur mcb panel plc protect rcd spur supply these units
    • Replies: 8
    • Forum: UK Electrical Forum
  6. T

    Should the MCB have tripped?

    Hi all, looking for some input from you guys. Had a call out a few days ago where someone has has a shock from brass light switch in a domestic property. When i got there, a decorator told me that he had the switch loose from the wall to strip the wall paper. He's used a steamer, so it points to...
  7. Y

    wholesalers mcb

    Im looking to put a supply out in a mancave, the earthing arrangement is tns. At the supply there is iscos installed so I was going to take a supply out of the iscos into a 40 amp DP MCB and run a 6mm T+E surface piped along an outside wall. I will be installing a 40A 30mA RCD in the mancave. My...
  8. R

    What Crabtree type RCBO fits this board?

    Hello guys, completely forgot to remove the board cover to check what type of rcbo was required for this particular Crabtree board. Anyone from experience know which type RCBO fits? thanks in advance!!
  9. J

    UK mcb tripping after new sockets

    hi all. A friend asked if i would look at his kitchen sockets as they would trip just the mcb now and then. i said ill look but thats it as he had a electrician install 3 spurs and add 1 socket on a radial circuit 16amp mcb and looks like 6mm t&e from mb for the circuit and looks like the combi...
  10. SteWal

    MCB trips when bulb goes?

    Hi folks, I’m looking for some advice on a minor problem my parents have with their kitchen lights. They have 2 light fittings in the kitchen each carrying 4 spots and on occasion when one of the bulbs go the circuit breaker trips - there are no RCDs. It only happens in the kitchen (the...
  11. old man sparky

    Here we go again, 6mm cable x 10kw shower x whack a 40A mcb in.

    Just been to another one of those !! Plumber replaces shower for upgraded version. 40A mcb replaces 32A. No problem mate !! that will work fine. So 12 months later the owners girlfriend moves in with him. So that poor old 6mm that was just starting to break a sweat for 12 months, suddenly...
  12. S

    Strange MCB trip

    Hi all, Had my downstairs ring final circuit trip the B32 MCB today. The missus was in the kitchen cooking and had apparently put the kettle on and as it was close to boiling the MCB tripped. I therefore assumed it would be due to the kettle so I checked the 13A fuse in the kettle plug but it...
  13. M

    Intermittent tripping MCB

    I’ve a fuseboard as pictured, which has been nuisance tripping on the downstairs ring final circuit. It started off with 32a breaker tripping which is RCD protected, and now it’s tripping the Main RCD switch. This is a relative's property and he’s already had an electrician in, who’s ran a...
  14. I

    32a mcb on a 2.5m radial

    Is the above OK, its feeding a fused spur downstream with a combi boiler attached to the spur. Cheers
  15. Rockingit

    Where to find Moeller MCB?

    Anyone know if Moeller parts are still around? And if so which wholesaler to try first - need a couple of 1p MCBs
  16. D

    Calculate 3 Phase MCB size

    Hi..I should probably know this but don't do too much 3 Phase stuff!! Can anyone give the formula for working out the size of a 3 phase MCB? I have a 12kw 3 Phase fryer to install. Cheers
  17. C

    Just installed a new 9.5kw shower, and sat the mcb on the bus barr, and there doesn't seem to be enough power to turn on the shower,

    Should I wire it straight to the live cable and not use the bussbarr
  18. A

    Wylex 6A plugin MCB

    Evening all. My neighbour just got me out the shower as he has no lighting. He's got an old wylex consumer unit with retro fit MCB, the one with the red button to trip. Anyway after removing the cover found nothing between L-N and L-CPC out going on both lighting circuits, but power on the...
  19. I

    Second radial line to 16a MCB

    Hello I am new on this website and first want to say hello to everyone. We moved to a house with old night storage heaters. We had to replace one in our bedroom this winter. The new electric radiator is 1,1kw with a plug. Night storage were hard wired 2,5mm cable with 16a mcb on night economy 7...
  20. S

    My MCB is ON but no current.

    Hello, In my kitchen, I make multiple sockets that are controlled by one MCB. For some weeks, I don't know why the MCB used to trip and I used to turn it back ON. One day the MCB didn't go to the off position but all those sockets stopped working. I pressed the test button on the particular MCB...

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