circuit breakers

  1. S

    How to co-ordinate circuit breakers trip for overload and short circuit?

    Can 50A B type circuit breaker be coordinated with upstream 50A C type circuit breaker to trip earlier on shorts and current overloads?
    • SparkyAus
    • Thread
    • ausie elec breakers circuit circuit breakers how to overload short short circuit trip
    • Replies: 1
    • Forum: Australia
  2. newfutile

    Mixing of circuit breakers

    It's all coming out anyway so it's an acedemic question. Would a Bill consumer unit be comparable with Eaton breakers? An Eaton main switch and mcbs are installed so height differences won't be a problem. I'm changing it for full rcbo with spd board anyway.
  3. Pixiofthewoods

    Why would a 20 amp outlet only work if the 30 amp breaker is on?

    I have a champion 7500 electric start Genny, model no 100463 that I bought second hand. I was told it was gently used but have since noticed that it has been tinkered with. My question of the day is; When I plug into the 20 amp outlets, I have to turn the 30 amp breaker on to be able to use the...
  4. J

    Seperation of circuit breakers in panels?

    I have a question around equipment & electrical separation of circuit breaker grouping that I want to reference against the Regs book. Initially believed this could be covered off by using 528.1 Proximity to electrical services (BAND 1 & 2 cables etc) Client has mixed circuits of 230V, 110V...
  5. S

    HSE bulletin- Lubrication of circuit breakers

    FYI.... Health and Safety Executive - Safety notice https://www.hse.gov.uk/safetybulletins/lubrication-circuit-breakers.htm?utm_source=govdelivery&utm_medium=email&utm_campaign=circuit-breaker-safety-notice&utm_term=body&utm_content=safety-notice-29-sep-21
  6. M

    Remote controlled circuit breakers MCB

    Please, help me to find the brand and model for a 120Ac 60 amp circuit breaker that can be remotely, turned on, off, and trip reset. It is used in the output of a small 7KVA gasoline generator. I found online the “Smart Breakers WiFi” from Leviton; but there is no WiFi on the yacht, and I don’t...
  7. L

    Bs 60947-2 siemens sirus circuit breakers

    Hi all. I've come across siemens sirus bs 60947-2 circuit breakers during a test and inspection job. I can't find any info on its breaking capacity and also its maximum permitted Zs. Any help would be much appreciated. Len
  8. R

    Over rated Circuit Breakers

    Can any one advise the regulations concerning Over rated protection devices, I am well aware that a circuit breaker must be adequate for its application, but what are the regulations regarding a circuit breaker that is over rated for the load, I.E. a 10A load with a 32A circuit breaker, what is...
  9. W

    What type of circuit breakers can I add to my panel?

    Hi everyone - I appreciate your time/opinion on this: I'm lucky enough to have a 200 amp electrical panel with a lot of open spots for new circuits/circuit breakers. I have an unfinished area in the basement that I'm wanting to make into my shop and it currently doesn't have any outlets. I...
  10. Ironbones

    DC circuit breakers VS semiconductor fuses high speed.

    Hi all. Just to start off still learning. Could any one help me with this and put me right if I am incorrect. I would like to understand the preference or reason for opting for DC breakers or semiconductor high speed fuses, when been used in low voltage DC circuit. I understand that...
  11. haptism

    LSN circuit breakers

    Today I come across some mcbs in a CU ive never seen, theyre made by LSN, single pole B6, but dont appear to have any BS, EN ect. They have a CE mark, AC 230/400 and have a breaking capacity of 10Ka. Anyone ever seen these, are they cosha ?? Being rated at 230v-400v I dont expect they that old...
  12. P

    Circuit Breakers help :-)

    Hi all, new member so please go gentle... I have been in my newbuilt for a while now but this weekend was the first time I tried to fire the angle grinder and subsequently the hoover to do some work. As you would expect, I was using the garage power sockets. However, the circuit breaker kept...
  13. J

    Air circuit breakers

    I have following air circuit breakers for sale used only 1 time for a project Brand - SOSUL MFGD - 2011.11.17 Origin - KOREA Rating - 630A Model - VL - 12E20B06 Brand - ABB MFGD - 2009 Origin - Italy Rating - 630A Model - Brand - ELATEC MFGD - 1999 Origin - German Rating - 800A Model -...
  14. A

    Rewire and circuit breakers

    Hi guys, Hoping someone would be able to help with this one. My grans house still has the good old fuse box with fuse wire which I am aware could do with upgrading to a proper circuit breaker panel. However I have no idea on how much it would cost her and hoping someone would be able to give...
    • Ajfaccini
    • Thread
    • breakers circuit circuit breakers rewire
    • Replies: 14
    • Forum: UK Electrical Forum
  15. stephen atherton

    Range Oven Tripping Circuit Breakers

    We just had a range oven fitted (gas on hob with two electric ovens - total power rated at 5.3Kw) so a 32Amp mcb is in the board on the dedicated cooker circuit which was there from previous cooker. When one oven is on everything works fine, but when both ovens are switched on together they trip...
  16. D

    Circuit Breakers

    Was just looking at circuit breaker types and I was a little bit confused so wondered if anyone could help clear it up. Basically say If I determined my current would be 26a before taking into account any rating factors and chosen a 32a circuit breaker for my protective device. After taking...
  17. D

    Circuit Breakers Not Breaking!

    help! I've just tried doing what I thought was a simple replacement of a plug fascia as the old one got covered in paint during some decorating. Turned off the power at the breaker, ensured the circuits were dead, removed the old plug front, wired in the new plug and replaced the fascia back...
    • DomW
    • Thread
    • breaker breakers breaking circuit circuit breakers
    • Replies: 7
    • Forum: UK Electrical Forum
  18. T

    Removing Schneider/ merlin geran Circuit breakers from panel board busbar

    Hi I am replacing 2 circuit breakers in a Schneider panel board. Board is 3 phase and main switch is Schneider NSX 100. Circuit breakers are Schneider NS100N compact series. Replacing 30 amp breakers with 63 amp identical units. The breakers are single phase units. my problem is that I am having...
    • timmy123
    • Thread
    • board breaker breakers busbar circuit circuit breakers merlin panel removing schneider
    • Replies: 1
    • Forum: Talk Electrician Forum
  19. A

    Design current and circuit breakers

    Hello, I have a problem with design current (Ib) and selection of the circuit breaker (In). If I have a circuit of 7A and I apply no diversity, then Ib = 7A and I select a 10A circuit breaker. But if I apply diversity and I get, say, 5A, is 5A now the design current Ib? So can I select a 6A...
  20. E

    Ring supplied from two circuit breakers

    Hello guys, hope someone can help me with this. i was carrying out a small job on a ring main (re-fix a socket to a wall nothing major), and noticed that the ring was being supplied from more than one circuit breaker a long with the other ring main in the flat. Obviously i rectified the job as...
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