breakers

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  1. telectrix

    crabtree breakers. what fits?

    need 5 MCBs, single phase, but to fit in a 3 phase board. the existing ones are crabtree 6HSO. are the polestar,loadstar or what? they are not starbreaker types. busbar connection is a screw termilal.
  2. MFS Electrical

    Dorman Smith loadmaster breakers

    Replaced an old TP&N Dorman Smith DB the other week there with a nice shiny new one, So being a nosy sod and wondering why old dorman smith breakers don’t ever seem to trip I decided to drill out the rivets and have a peek inside. All I can say is no wonder they never trip:eek: there is no coil...
  3. M

    type fitted breakers

    i see that in the 18th edition there is now a coding for type fitting , i have been coding any mix and match breakers as code 2 , after contacting lots of manufacturers there guidance is always that they have not type tested any other manufacturers products for there boards, as we know many...
  4. 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...
  5. 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...
  6. 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 -...
  7. Torcikas

    Cables, Rcbo's, old breakers

    Hey moving out in few month, selling all my stuff. So i have twin and earth 1.5/2.5 like 200-300 meters each, 3 core few hundred. Rcbos B6/16/20/32/40 amps. And like 100 or more old circuit breakers and rcb. Aswell some mains I think, earthing 10/16 mm/ bars sockets switches and etc. I can sell...
  8. J

    Understanding breakers and RCD, un-vented cylinders

    Hi I'm a Plumber and heating engineer and a new member to your forum. I have a basic knowledge of electrics but I'm curious about how breakers and Rcd's work and whether they prevent fires. My basic understanding is the breaker trips if more power is been drawn than is safe and an RCD...
  9. 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...
  10. 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...
  11. astormatt

    MCB or MCCB?

    Afternoon all Hopefully someone can throw some light on a small problem i have. I am currently on a job, carrying out an eicr on a building and i am confused by the ocpd feeding it...... The set up is, main cut out in the sports hall building, then there are 5 circuits fed from the 200a main...
  12. D

    1.5mm clipped to ceiling supplied on 20A breaker

    Morning fellas On job at moment. Am just looking at lighting circuits. They are supplied off 20A type C breakers run in 2.5mm to MDB's then from there each lighting circuit goes down to 1.5mm flex 5 core with 2 cores being used for dali. From what I see cable rating is 20A is a 20A breaker to...
    • DaveS
    • Thread
    • being breaker breakers cable ceiling circuit clipped supplied
    • Replies: 16
    • Forum: UK Electrical Forum
  13. H

    2 Rcd's?

    I'm thinking of having a new fuseboard fitted. The existing one has 8 fuse in it and is boxed in. The 2 electricians who have come to quotesay i need a board with A main switch 2 Rcds and 8 circuit breakers. the board will not fit in the boxing. My friend has a board with 1Rcd and eight circuit...
    • HorridToe
    • Thread
    • breakers circuit rcbo's rcd's
    • Replies: 9
    • Forum: UK Electrical Forum
  14. Sintra

    Lv Circuit Breakers

    Sintra submitted a new resource: LV Circuit Breakers - LV Circuit Breakers Read more about this resource...
  15. 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
  16. D

    Removing MEM breakers

    Hi folks, Well today I attended another house to perform a bathroom upgrade. Upon visiting the mains board I noticed it was a MEM. Not ideal I thought as my previous experience taught me that RCBOs were not possible with these mcbs. I then noticed that a previous spark had fitted a hager RCBO...
  17. 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: Industrial Electricians' Talk
  18. M

    B type breakers with in line UPS

    Hi I'm hoping that someone can help. I am adapting some circuits which are supplied via an in line ups. At present, the ups supplies a 72 way db and the final circuits are supplied from the DB. This is a laboratory research environment and it is expensive (about £20k a time) when they...
  19. 1capybara

    Table 41.3 Max earth fault loop impedence (Zs)

    The heading of table 41.3 says it shows " max earth fault loop impedance Zs for Circuits Breakers..... giving compliance with 0.4s disconnnect time of 411.3.2.2 and 5s disconnnect time of 411.3.2.3." 411.3.2.2 is for final circuits not exceeding 32A. 411.3.2.3 is for distribution circuits and...
  20. A

    2.5mm2 ring main protected by 20amp breakers

    So an old colleague of mine stipulates that ring main should be protected by 20 amp breakers. Why you ask? Well he said because a piece of 2.5mm2 can only take circa 26 amps and if the ring main broke at any point it would effectively make it two radials, and it would be protected by a 32 amp...
    • atm84
    • Thread
    • breaker breakers main protected radials ring ring main
    • Replies: 31
    • Forum: UK Electrical Forum

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