breaking

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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. M

    Pull cord switch for power shower keeps breaking

    Hi All, I hope you are doing well. I keep having the issue with this pull cord switch to the power shower. I used a number of pull cord switches 45A and 50A ones mostly from Screwfix but I think the problem is with the wiring. As you can see on the picture the RED and BLACK twisted copper...
  3. P

    Can anyone confirm the breaking capacity of this?

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

    Quinetic switches breaking

    Hi, I had some Quinetic switches installed today. Most of them are fine, one of them is not. I have a light in each of my kitchen and dining room. My electrician replaced each of the one-gang switches with one-gang inline receiver switches (QURS1W). The dining room switch works fine. The...
  5. mmi2001

    Breaking a lighting ring circuit in the middle

    We have a lighting circuit on a dimmer and with 5A round pin sockets for standard lamps and table lamps (ie: no ceiling roses) After about 7 years of reliable use it started to take our trip out (and the dimmer!) Mostly intermittent but almost instantaneous now. Fault-finding showed that if...
  6. K

    HD channels breaking up on Freesat via built-in tuner on new LG TV

    Bought a new telly and it has a freesat tuner. My house is wired for Satellite so I plugged in the cable to the telly. Almost all channels are fine, however, BBC HD channels break up with both picture and sound, so completely unwatchable. I read of a known issue on this BBC blog and also this...
  7. S

    Breaking negative DC twice in disconnect

    Hello all, We have a 175 Kw 1500Vdc string inverter. It has 12 mppt channels with 2 inputs each. Each channel (you can have 1 or 2 strings per "chanel") has 1 DC contactor for the positive and 2 DC contactors for the negatives. Does anyone know the specific UL requirements for this and where to...
  8. 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
  9. Empire

    Crabtree f-60 tp&n circuit breaker bs# and short circuit capacity

    Morning All, Having spent many years gleaning information from you all as a non member I've finally needed to join because, try as I might, I just can't find the answer to this puzzle, so here goes. I've just installed, replaced really, a TP sub board that's being fed from a Crabtree 60A STD...
  10. Zdb

    DIY "electrician". Is he breaking the law?

    Ok guys so I have a friend of a friend who has zero electrical qualifications. He's setup his own lighting business doing LED conversions. He mainly swaps fluorescent light fittings for LED panels and sometimes adds extra fittings too. He's done so in offices, factories, gyms and he's soon going...
  11. 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
  12. 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
  13. Michaelwgroves

    Wera 247 Single-Pole voltage Tester screwdriver keeps breaking

    I purchased a Wera Kraftform Kompakt VDE 1 piece screwdriver set which I love. However, the 247 Single-Pole voltage Tester screwdriver keeps breaking. I'm now on my third replacement! My old voltage tester screwdriver I've had for over 25 years which was passed down to me by my father. I only...
  14. W

    Breaking Existing Ring for Garage Conversion

    Hi, I'm in the process of converting my garage into a utility and living area. Currently the garage has 2 sockets and a switched fused spur that are part of the upstairs ring main. This ring main serves the upstairs bedroom only as it's classed as the 'Extension Ring Main'. It was installed as...
    • wint100
    • Thread
    • breaking conversion existing garage ring
    • Replies: 8
    • Forum: UK Electrical Forum
  15. A

    Fuse breaking capacity

    where do you look to find the breaking capacity of fuses?
  16. 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...
  17. S

    is this company breaking the law?

    Firstly, please excuse my ignorance, but i'm not a sparks so will prob be using the wrong terminology etc. Sorry! My husband starting work recently for a company that installs heaters. Originally, they were supplied with a plug, but apparently as time has gone on, they needed a spur installing...
  18. A

    Channel 5 - Illegals: Breaking into Britain

    There's a programme on Channel 5 at the moment about illegal immigrants. They've just been talking to some guy who came here in 1995 with a 'rented' passport, then he destroyed his own passport so he wouldn't be deported, paid £4k for fake papers so he could work, worked in construction until...
  19. 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...
  20. 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

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