circuit breaker

  1. H

    Kitchen downlights trip circuit breaker

    Can anyone help me? I'm clueless on electrical stuff, but don't want to be fleeched by getting someone in to take a look at the problem. 12 months ago we had some new kitchen downlights installed, and 3 months after that we had a new fusebox installed as we had a new kitchen put in. Both jobs...
    • heppenm
    • Thread
    • breaker circuit circuit breaker downlights kitchen lighting lights trip
    • Replies: 35
    • Forum: UK Electrical Forum
  2. F

    Motor Protection Circuit Breaker (MPCB) - on a small pump

    Hi All A customer had a small 3 phase water pump (water from a well) which had a MPCB Legrand 02806 (via a 10A 3 phase breaker) e-catalogue 2012/2013 - © Legrand The customer has changed his supply to single phase and the pump over to a single phase one - 3.6Amps 230V Now the MPCB can be...
    • fjr1300
    • Thread
    • breaker circuit circuit breaker motor protection pump small
    • Replies: 8
    • Forum: UK Electrical Forum
  3. S

    Circuit breaker testing

    I've been asking this question for some time but never seem to get a definitive answer. Why are we compelled to test RCD's to verify their correct operation but not MCB's? MCB's or simply circuit breakers are being sold on ebay - all types, all ages, all makes - and no-one has any idea what...
  4. H

    Now that's what you call a circuit breaker...

    A picture speaks a thousand words, well in this case a video... 500,000 volt line opened under load - YouTube No doubt E54 will be able to explain what is actually happening, I find the description of the clip difficult to understand :yes:
    • Heisenberg
    • Thread
    • breaker circuit circuit breaker that's
    • Replies: 8
    • Forum: UK Electrical Forum
  5. B

    Voltage Operated Earth Leakage Circuit Breaker

    An old fuse board with only 4 fuses 1 5amp, 1 15amp and 2 30amp fuses has a VOEL CB as the ADS for the whole board. I was adding to an outside circuit, one more light, using SWA cable and whisker boxes for a junction. When I came to testing, I was not sure how to test VOL CB. I have a Metrel...
  6. Goody

    More than one circuit on a breaker; what code, plz!

    What code should I give where a breaker serves more than one circuit , please see the picture. Could I suggest a CU change as I could not find another breaker of similar type to stick the other circuit to? The reg. says you can spur off using a JB, at the socket or at a breaker. What is your...
  7. A

    main switch or circuit breaker

    Hi all Could i have some advice regarding what to put in to the main switch or circuit breaker part of an niceic domestic EIC. I have just started testing and inspecting so sometimes need a bit of guidance. The problem i have got is the 2 way Hager cu provided. The cu is from split 25mm tails...
  8. N

    Current op Earth leakage Circuit Breaker

    My house has overhead L & N Supply with TT Earthing, an Electrician put in a new Consumer unit for me with 30ma RCD and Mcbs but the old MEM COELCB that was in use with the old Fusebox remained, this incidentally is rated @40A. 30ma Trip as i have now built an extension to the house and need to...
    • normacman
    • Thread
    • aus breaker circuit circuit breaker current earth earth leakage leakage
    • Replies: 10
    • Forum: Australia
  9. M

    omnipolar circuit breaker

    hi just rewired a house where the kitchen will have a induction hob . as the title states . the manual recommends a dual pole circuit breaker to protect the hob . does any body know why this is ? regards m
    • mswesty
    • Thread
    • aus breaker circuit circuit breaker
    • Replies: 5
    • Forum: Australia
  10. P

    What size circuit breaker or rcbo

    Just checking the regs for size of circuit breaker or rcbo to protect pv. the regs only says Type B as far as I can see:shades_smile:
  11. I

    Solar PV - Type B or C Mini Circuit Breaker MCB For AC Circuit

    Hi, I hope you can help. I am in the process of completing our first solar panel installation and am using the SMA (sunny boy 2000) inverter. We are installing ten panels. Can anyone confirm whether we should use a type B or type C 16A MCB for the consumer unit. Thank you.
  12. S

    Melted mains circuit breaker

    Hi. Does anyone know why a 800A mains circuit breaker just melt? Thanks
  13. T

    Three-phase circuit breaker size calculation help

    Hi, i'm a little confused about the way to calculate the amp of the circuit breaker for a three-phase system. If i have a power of 11.5 kW and voltage of 400V, what size circuit breaker is needed for three-phase system. My calculation was 11500/(1.732x400) = 16.6 Amps per phase ... 16.6 x 3 =...
    • ta-electrical
    • Thread
    • aus breaker calculation circuit circuit breaker help size
    • Replies: 40
    • Forum: Australia
  14. S

    Electric reading when circuit breaker is turnt of?

    I get a 2.4v reading from a ring circuit when i have turned off the circuit breaker (32amp) and when i turned of each circuit breaker the reading drops, what is this? Thanks
    • Serenity
    • Thread
    • aus breaker circuit circuit breaker electric electrical reading
    • Replies: 3
    • Forum: Australia
  15. S

    DC Circuit Breaker

    I have a 125V DC panel. All the 2-poles CBs are rated 250V DC. I don't understand why they are all rated 250V and not 125V?
    • somesome
    • Thread
    • aus breaker circuit circuit breaker
    • Replies: 2
    • Forum: Australia
  16. J

    90Vdc miniature circuit breaker installation

    Hi, i am looking to install a double pole MCB , like the siemens one into a dc circuit which will have 30 A current and 90Vdc voltage passing, anyone know how to connect the MCB ? From the research i done, it seems that connecting them together like the pic is the common way.
  17. O

    GU10s popping the circuit breaker

    Ok Looking for a bit of feedback here as I do work for a letting agent I am getting a common problem reoccurring with GU10s ie when they go they sometimes trip the circuit breaker ie type B 6 amp. Now I have checked the circuits and fittings out and these lamps can be plugged into a track or...
    • oldtimer
    • Thread
    • aus breaker circuit circuit breaker
    • Replies: 16
    • Forum: Australia
  18. M

    Circuit Breaker inline with another Circuit Breaker

    I recently moved into a mobile home, and I am questioning the electrical installation that was done. My main question is can you have a circuit breaker inline with another? The electrics consist of the main supply into an outbuilding which has a meter, then a main off/on switch connected to an...
  19. S

    Part P Assessment ... disconnection time of an S Type Circuit Breaker w/ timed relay.

    Just had my Part P Assessment (and passed!) :) Although I was asked one question particulat question ... so Stuart, whats the disconnection time of an S Type Circuit Breaker with timed relay. My jaw and other parts of my body hit the floor! Funny thing is after I tried for 5 mins, he couldnt...
    • Stu Too
    • Thread
    • assessment aus breaker circuit circuit breaker disconnection part part p relay time type
    • Replies: 6
    • Forum: Australia
  20. M

    How to calculate sizing of vacuum circuit breaker

    Hi- I am looking for some help/ advice please. I'm confused about how How to calculate sizing of vacuum circuit breaker. This project I work on it use 40m0A TP Vacuum circuit breaker to support pump 800 kW 11kV I calculate the current just 49.4 A (800*1000/1.732/11000/0.85 ) I don't know...
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