breaking capacity

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  1. L

    Breaking capacity of MCBs

    Hi all, I have a question regarding the breaking capacity of circuit protective devices. So, the breaking capacity rating of devices in domestic / 230v tends to be 6ka, and for commercial / 3 phase it tends to be 10ka. Say the PFC at the origin was greater than the rating on the MCBs, and the...
  2. P

    Can anyone confirm the breaking capacity of this?

    Hi, Interested in the breaking capacity of this fuse... 4kA? Anyone know for sure? Thanks
  3. D

    Which is better BS1361 or BS88?

    Was wondering why was BS1361 replaced by BS88 even though BS1361 tends to have a larger breaking capacity according to the on-site guide if I'm reading it right, however, I maybe wrong. For example BS1361 breaking capacity can be 16.5kA to 33kA depending on what type you get, where BS88 is 16kA...
    • David345
    • Thread
    • 1361 18th edition amendment 1 amp amps better breaking capacity bs1361 bs1361 fuse bs1361 or bs88 bs88 bs88 fuse bs88 or b1361 cartridge cartridge fuse fuse fuse box fuseboard fused fuses kiloampere mcb
    • Replies: 6
    • Forum: UK Electrical Forum
  4. Adam_92

    breaking capacity of overcurrent devices

    I’m wondering if someone can tell me in the OSG or regs that it has the short circuit breaking capacity of overcurrent devices someone said it was table 7.2A but can’t find it anywhere
  5. G

    Breaking capacity of 3871 fuse lower than pfc?

    i have just done a test on a property and the pfc at origin of installation was 0.712ka. The 3871 mobs have a 6000a breaking capacity. I am a bit confused as I have read something about it always being higher anyway (16ka) for a fuse or main switch 100a or less. Any info here would be much...
    • Gerry Savage
    • Thread
    • breaking breaking capacity capacity current fault fuse lower maximum pfc qualified
    • Replies: 8
    • Forum: UK Electrical Forum
  6. A

    Fuse breaking capacity

    where do you look to find the breaking capacity of fuses?
  7. HappyHippyDad

    BS3036 breaking capacity and PFC..

    Afternoon.... I have just completed an EICR and am unsure if the Wylex BS3036 fuses require a code due to their breaking capacity related to the PFC. Firstly I would like to identify if they are S1A, S2A or S4A as that would solve the problem of the PFC being 1.35kA, however I dont think its...
  8. M

    Breaking capacity

    Hi can anyone advise me. My company have installed a dimming rack ( from USA ) it's a 0-10 v dmx system . It's 3- phase and protected by 3- phase B 20 amp 60898 but on the dimmer rack it has 24 x C10 amp 60898 but they only have a breaking capacity of 3 KA my Pfc reading is 2.9 so it exceeds the...
  9. polo1

    Breaking capacity for MK LN 5905

    Hi, can anyone advise the breaking capacity for an old MK Sentry type 2 LN 5905 mcb - tried forum search and Google without success? Thanks in advance
  10. sparksburnout

    Breaking capacity question

    Apologies if this should be in a beginners section, but I can't seem to see one. Anyway here goes - I am having a bit of a mental battle regarding PSC and the breaking capacity of the protective device. Let's take a domestic setup as an example, with an 80A DNO fuse, BS1831 I think off top of my...
  11. N

    BS3036 Breaking Capacity

    I know this has been asked before but I can't locate a thread with a conclusive satisfactory answer... Got an old Memera 3 board (says it's to BS5486 Pt.13) with a mix of BS1361 cartridge and BS3036 rewireables. PFC is 2.03kA. Breaking capacity of BS3036 may be 1/2/4kA depending on type...
    • NickD
    • Thread
    • breaking breaking capacity capacity
    • Replies: 15
    • Forum: UK Electrical Forum
  12. G

    breaking capacity of fuse and mcb

    Cant seem to find info anywhere for bs3871 m1 plug in wylex type b mcb. Anybody know the braking capacity?? also wylex 5a fuse wire pls Merry christmas
  13. S

    Breaking capacity for 1361 fuses...

    Hi, Anyone know the breaking capacities / KA for 1361 cartridge fuses - namely 5 & 15A?? Cheers
    • SteveDL
    • Thread
    • 1361 always breaking breaking capacity capacity cheers fuse fuses reply
    • Replies: 7
    • Forum: UK Electrical Forum
  14. O

    breaking capacity

    Guys what is the breaking capacity on an old Wylex type 2 MCB the ratings are 5,15,30 and I take it they are BS3871
    • oldtimer
    • Thread
    • breaking breaking capacity capacity
    • Replies: 7
    • Forum: UK Electrical Forum
  15. D

    Crabtree Breaking capacity

    Can anyone tell me where I can find the breaking capacities of Crabtree BS3871 type 1 MCB's. The installation has to be 20+ years old and there are no Device designation marks on the breakers themselves :confused5:
  16. Top Cat

    Breaking capacity of a 3871 breaker?

    Anyone know what the kA of this breaker is? Also on same board i had a 30mA RCD main switch that had a BS number of 4293. Can't find that number should i just put down 61008?
  17. D

    MCB Breaking Capacity

    With regards to to BS7671, can anyone tell me where I might find values for the Breaking Capacities of Type B MCB's. I just can't find the answer to this one? :-(
  18. telectrix

    breaking capacity 3036

    as the title, i was asked the question " what is the kA breaking capacity of a 3036 fuse" i couldn't answer. only a guess of around 6 -10kA. anyone know?
    • telectrix
    • Thread
    • aus breaking breaking capacity capacity
    • Replies: 5
    • Forum: Australia
  19. J

    Breaking capacity for BS 3371 ?

    Hi all Can anybody tell me the breaking capacity of a BS 3371 circuit breaker? On the side of the breaker where it mentions breaking capacity it just says 'M9' , which I guess is some kind of reference. Did a quick google search but to no avail. Cheers John
  20. O

    recoomendation code for breaking capacity

    what is the recommendation code for a mcb rated at 1KA and the pfc on the installation is 1.8 ka

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