mcb

I have an old MK Sentry Consumer unit fitted with LN59xx MCBs: I want to replace the LN5905 5A MCBs with H6832s (6A, 30mA, Type A) RCBOs so that the lighting circuits are RCD protected (given that I cannot find an RCD to fit this CU). I can see that the busbar isn't compatible, so I will...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...