mcb

  1. B

    Blown Sockets - Diagnostic Assistance Needed Pleeeeease?

    Can anyone apply some logic to what's happened? Background: We have two plug socket MCBs. Summary: Two separate kitchen appliances seem to be causing an MCB to blow (DIshwasher and Freezer) Detail: 1. A socket MCB blew. 2. With the dishwasher off, I was able to reset the MCB. - changed fuse in...
  2. R

    MCB

    MCB reset advice please. Memera 2000 Consumer unit. MCB only, not RCD version. Popped bulb in table lamp has caused power loss to plug sockets in house. Only 1 double plug socket is working as that must be operating on the same circuit as powered by cooker single plug socket (Cooker MCB). MCB...
  3. M

    4.2Kw Oven install

    Hi All, Can someone clear up some confusion for me please? I'd like to install a 4.2 Kw oven and grill. I calculate that this will pull a maximum of 17.5 amps. As I understand it (...and I'm willing to be corrected), 2.5 mm twin and earth is rated at 27 amps in conditions where it is clipped...
  4. eveares

    Kitchen appliance service man advise us to upgrade 20A MCB to 32A! (Rant)

    We had our Electrolux combi microwave/fan oven replaced with a brand new one under warranty as our old one was written of due to severe rust, what prevented a previous repair man being unable to get to and replace the heater element what was leaking current to earth and tripping the RCD. I was...
  5. A

    two trip switches on one socket

    hi ladies and gentlemen, im in Dublin IRELAND so mainly similar to uk specs. ive had an electrician out today to fit an outdoor security light but was unable to do it because the socket he was going to take a fused spur from wouldn't isolate when he turned off the trip switch he had to turn off...
  6. E

    Shed Consumer Unit no power

    Two years ago I had a consumer unit fitted in the shed to supply a LED bulk head light and double socket. In the consumer unit I have three switches: one for socket, one for light and the main switch. I wanted to change the light and when wiring it up (with all power off of course) I made a...
  7. N

    CU 32->40a fuse upgrade

    Hi and thanks in advance to all the givers of advice here. I want to upgrade a Triton electric shower from 8.5kW to 9.5kW but would need to swap the existing 32a CU fuse for a 40a fuse. Is there a way for an idiot to safely tell what size the wiring is on that circuit as I gather I need 8mm for...
  8. C

    Recommended circuit for arc welder, CU - Garage - welder.

    Hi guys 'n gals. In a nutshell what would you recommend from the consumer unit, 30m to a garage, CU in there and out to an old oil filled arc (stick) welder capable of going from 30 amps up to 180 amps. At the moment I have CU in the house with 45amp Type C RCBO, 10mm T&E to garage 30m away...
  9. H

    Cable size for sockets?

    Good morning all. I want to add some extra sockets in a 1930s two-bed semi that I'm renovating down in Bideford and had a query regarding cable size. At the moment, the consumer unit connects to two mains circuits - one labelled "downstairs sockets" and the other "upstairs sockets". These both...
  10. R

    RCBO tripping with SWA extension to shed

    Hi all, Hoping you can offer a novice some advice. We've had the house re-wired with a new fuse box with RCBOs. Our electrician left the build a while ago and has sadly passed away since. Before he left he didn't finish connecting up the SWA cable running to the shed, so I've done it using some...
  11. P

    Please review my MCB calculation for 16amp 3.5kw oven

    Hello guys. To accomodate a new 16amp / 3.5Kw oven, I have laid a 6mm T/E from my consumer unit to a new 45amp cooker switch, going onto a CCU. There is a spare 16A MCB in the consumer unit but my calculations tell me I need a higher rated (19) MCB. I = 3500 / (230*0.8) = 19.02 Can some...
  12. R

    Lost power to flat, no switches have gone?

    Hi, I’m not an electrician so won’t pretend to understand anything. But I’ve just lost all power to my flat, nothing tripped off but the power had been intermittent on and off when ever it rains. I’ve visited the meter boxes and there were a smell of burnt plastic like when a capo blows and the...
  13. J

    Does adding a 16A MCB to a spur meet regs, or do I need a 13A fuse?

    Hi, I have a new-build with (just about) attached garage which has one double socket and one light socket installed. The double socket is connected via a spur from the ring main for the downstairs sockets using a single 2.5mm T&E cable through the wall to the main house. Downstairs sockets are...
  14. D

    Crabtree MCB Tab vs no tab?

    Hi all, I bought an extra mcb for my consumer unit to add an electric oven in kitchen. (Old one was gas). I’d noted that the make of existing mcbs were Crabtree and when I googled was pleased to see that screwfix sold them. Problem is the one I’ve bought has a metal tab sticking out the back...
  15. B

    MCB size for reference method? & Mini Kitchen Consumer Unit

    First post after getting my first house. So, I've traced the cables round and read up on the regs but I'm going round in circles with checking a few things. Do I need to get somebody in to put these things right before we start to decorate(over the next 5 years!) I would pay for a proper...
  16. andyr123

    would you trust a 10amp MCB on a 3a central Heating Circuit

    Moved into this new house in Dec 2016 , house was built in 2008 - and I notice that although every heating controls (time clock, zone valves, boiler, pump) says protect with DP switch fitted with 3a fuse that the only thing that is protecting the circuit is a SP 10a MCB in the consumer unit...
  17. andyr123

    Mains switch in Consumer Unit is only Single Pole

    I noticed today that the mains switch in our CU is a single pole (63a fused) switch (only Live attached) - when did they do away with Double Pole mains switch and wouldnt Double Pole be safer than single pole so that when you turn off the main switch in the CU it kills both live and the neutral...
  18. andyr123

    Lighting Circuit in Consumer Unit not protected by an RCD

    Hello - my sockets RCD tripped the other day and all sockets upstairs and downstairs went off - all well and good so far - but all the lights in the house were on , and I see in the (GE Euroline) CU that there is only one RCD trip and that is protecting the sockets only - the Lighting Circuit...
  19. symbiosis

    replacement MCB's

    Hi - I have a consumer unit in my static caravan in Greece (I'm posting here as its a UK made van and so all the electrics are UK spec). I want to replace an unused 6 amp MCB for a 32 amp so I can run an extension to my workshop and fit some sockets. The existing MCB's are all Hager MB type and...
  20. A

    Additional power point installed correctly?

    Hi. I wonder if someone is able to advise me or point me in the right direction. I had been wanting an additional double power point installing in our master bedroom. I was ready to have this done by a qualified electrician but on returning home from work at the weekend I found out that my...
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