circuit breaker | Page 5

circuit breaker

Recent contents View information Top users
  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...
  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...
  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:
  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...
  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
  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 =...
  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
  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?
  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...
  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...
  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...

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top