mcb

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  1. R

    Smeg 19.5kw 53amp mcb

    Evening , got to wire in a smeg 19.5kw TR4110IGR Using diversity I work it out to : Total load 84.7 Diversity: 10amp 30% of 74.7= 25amp Total = 36 I would fit 40-45amp breaker on 10mm clipped direct. No insulation and no cooler socket ? Am I missing something with Smeg and why they want 53...
  2. Michaelwgroves

    Boiler circuit 16A MCB

    I'm following a spark who used an existing Panel Heater circuit, for new gas boiler circuit 6 months ago. The panel heaters were removed, so it's now a dedicated boiler circuit. I'm doing an EICR. I've found a number of faults; 1. No grommet in Consumer unit knock out, used for gas bonding (It's...
  3. archee

    2.5mm2 on with CPC cut off to 32amp mcb Is this normal ?

    Hi, A question to all the sparkles out there who could explain this mess to me please. Bought a house built in 2000’s found this 2.5mm2 cable running to loft for radial sockets via FSU ( they had 3 amp fuse in there lol ) connected to mcb 32a as you can see for some reason they decided...
  4. G

    6mm kitchen radial sockets with cooker on 40amp MCB

    I've been asked to change few double sockets, but not keen on touching after seeing 6mm cable, so did a bit of checking as can see the kitchen 'extension' has been wired in 6mm (red) with a 40amp MCB. The radial has 5 double sockets, including a dishwasher, tumble dryer, washing machine and...
  5. P

    UK Volex Mcb replacement

    Hi i have a volex Vcu14 consumer unit and need a couple of 32A mcb's but have been discontinued and I don't really want to buy a second hand one. Is there an alternative option or make I can use? Thanks in advance
  6. saucyjack

    Garo MCB equivalent?

    Hi people; could anyone tell me if there is a straight substitute for a Garo 3P (40A) MCB please? I appreciate the whole mixing manufacturers/not ideal situation, but needs must I'm afraid. Many thanks in advance!
  7. O

    SPD's need their own MCB?

    Hi, now everything is SPD's I've been told they need to be on their own MCB. So incoming line goes through the main switch then busbar then MCB and into the SPD, SPD neutral joins into the incoming top of the main switch, and earth attaches to the CPC busbar. I think. What stops the MCB...
  8. O

    MCB size and wire size for an electric oven and induction hob

    Hello I have two new appliances Electric oven rated at 3.95 KW Induction hob rated at 7.2 KW total of 11.15 KW Currently it is on its own supply with a 10mm Twin and Earth and the MBC is 32amps Can you please advise if the following Cable size is sufficient ( behind plaster ) MCB Amp...
  9. D

    Dropped MCB onto tiled floor, damaged internally?

    Hi folks, quick question, I dropped a C16 MCB from 5 feet up, onto a tiled floor. No visible damage so I put it back with the others. Could it be damaged internally so as it would allow current to flow but fail to actuate in the event of over-current? Or is it a case of, if it's damaged, it...
  10. M

    Double pole mcb poles

    I've a C63 10kA DP MCB Is there usually protection on both poles or is 1 pole a switch?. I'm not seeing any markings to indicate either way. Cheers.
  11. A

    Can Wylex plug-in MCB be tripped by anything but overcurrent/short circuit?

    Hello, I have an old 16A Wylex SK type B plug-in breaker in the fuse box in my garage which keeps tripping, and every time (and only at that time) the 32A one of the same type supplying the whole garage in my home's main box also trips. It isn't happening fast, sometimes it takes days to happen...
  12. G

    Can I use a mcb as main switch? And also RCD protection? Read

    So as the title says can I use a mcb as the main switch. Basically to keep it short I’ve took a 25mm sub main to power an outbuilding. Mains coming in will be Henley blocked and new tails will go into enclosure with b63a mcb which then feeds 25mm swa to outhouse which contains its own c/u which...
  13. M

    Hey guys, what does for example 300A rating on a 3 pole MCB means?

    Hey guys, what does for example 300A rating on a 3 pole MCB means? Does it mean each phase carries 300A i.e. (Current in R=300A, Y=300A, B=300A) or it represents total currents in all the 3 phases i.e.(Current in R+Y+B=300A)? Please assist, it is confusing me a lot with my calculations of...
  14. u2v2w2

    Isolation sliders getting stuck on 3 phase distribution board to the point of partially braking off

    Anyone else had the same issue? Since this company keeps replacing machinery very often the MCB's get changed a lot so over time the slider contacts doesn't engage properly anymore.
    • u2v2w2
    • Thread
    • 3 phase board distribution distribution board getting isolation mcb off phase point stuck
    • Replies: 6
    • Forum: UK Electrical Forum
  15. B

    L-N short circuit MCB not tripping

    Hi all, I’m hoping you can shed some light on a problem I found. Please be gentle, I’m an industrial spark, not a domestic spark. I’ve been asked to look at a family members electrics as they are renovating a room. A cowboy spark has been in and messed the job up. I was asked to come in and...
  16. LewisM

    Help with finding MCB

    So a friend of mine has a new build (2020) typical new build lashed in. Hes getting an electric car soon however fitting a charger will be a pain in the backside as the meter cupboard is in passage on the side of the house the fuse board is fed by a sub main and is in the toilet under the stairs...
  17. L

    Hager NB106 Mcb change to RCBO

    Hi Guys I'm not a Hager user so hence the question. I've been asked to wire in lights and a fan etc for a bathroom for a mate of mine who's a bathroom installer, I've called at the house today to take a look so I can price the work, the existing consumer unit is a plastic board fitted out...
  18. V

    I am allowed to replace the 2.5mm wire from a radial circuit to 4mm and the 16Amp MCB for a 32Amp

    Could you tell me please if I am allowed in England to replace by myself the 2.5mm cable from a radial circuit to 4mm and the 16Amp MCB it has now for a 32Amp?
    • vadiro
    • Thread
    • 16amp 2.5mm allowed circuit mcb radial radial circuit replace wire
    • Replies: 4
    • Forum: DIY Electrical Advice
  19. V

    Maddening MCB Tripping fault

    Hate these. Been called out to troubleshoot a tripping MCB. It's a house I've been to before and I know the wiring is a real dogs diner, but anyway. Got an MCB that's tripping out with no appliances plugged in. The sockets themselves are not in a great state, however continuity and insulation...
  20. S

    Why is MCB tripping after replacing Honeywell controller with Tado receiver

    Tried replacing Honeywell controller (ST6400C) with Tado wireless v3+ receiver. After switching the power of on, the Tado controller lights up and connects to WiFi. However, when the hot water or heating is activated via Tado app, the fuse in the central heating circuit blows off and the MCB...
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