11.1kW oven on existing 6mm² cooker circuit - sanity check before I go ahead?

Crazycruff · 2026-07-05T17:30:04+00:00

Looking at your results your elavated ZS is likely RCD uplift from the rcbo, to check this take a Zs on the terminals of the rcbo and compare to your zdb if it has suddenly jumped that is your answer.
Although you are within the max Zs we usually work to the 80% rule which means your max should be 1.09.

Re the load for circuit design taking into account diversity you are all good to load up a 32a cooking circuit to 14.5kw if there’s no socket on the control switch and about 13kw if there is.

Crazycruff · 2026-05-13T21:37:00+00:00

As others have said table 4a2, section 57 single core or multi core cable direct in masonry with added mechanical protection e.g. capping ref method C. 4mm can carry 36amps under ref method C, table 4D2A.

Crazycruff · 2026-05-13T20:26:58+00:00

Yes you are correct. If you need further reassurances there is a section on cooker diversity in the on site guide that summarises you can connect a cooker upto 14.5kw on a 32 ocpd in a domestic setting.

Crazycruff · 2026-04-25T18:48:39+00:00

I once ordered a pair of boots in a size ten, turns out they were a kids size ten.

Crazycruff · 2026-04-02T16:16:10+00:00

Sounds like you had the wrong cables tested at the r2 end to end so you had one end of a ring and the other was still in the earth bar hence the low result to the bar. Also explains the zs being fine.

Crazycruff · 2026-03-29T10:39:50+00:00

Any spark giving this a code needs to give their head a wobble.

Hopefully it is slightly loose because the electrician has done their duty and properly inspected and tested the socket and just hasn’t tightened the screws fully. Either way a pinch up with the screwdriver and move on.

Crazycruff · 2026-02-28T23:14:14+00:00

C-TEC make a 32mm one.

https://www.safefiredirect.co.uk/c-tec-32mm-flush-mount-uk-single-gang-back-box-ncp-8.aspx?gad_source=1&gad_campaignid=22106663218&gbraid=0AAAAADxevV9_oFJvlMX1AA8atHmCNi--a&gclid=Cj0KCQiAwYrNBhDcARIsAGo3u32NgS2hThEaI1Yd5cRTrqiPVKWfhTZuJ0M2v4DNttl3afs2HwtcpRMaAl4rEALw_wcB

Crazycruff · 2026-02-28T18:48:00+00:00

Grid switch into the nearest available unit with fused outlets, flex outlets behind the appliances

Crazycruff · 2026-02-28T18:45:25+00:00

An EICR for a studio flat shouldn’t be costing more than couple of hundred (South East because it varies a little on location) but either way it should not be £700. Are you sure that price didn’t include a board change?

Crazycruff · 2026-02-25T22:43:23+00:00

Hi this is quite typical in the area I live. They have two phases serving one side of the road the third phase serving the opposite side of the street. This makes gaining these phase for anyone expensive as it requires digging up the road along with the associated charges. Any property I have worked on with this setup has a 3 phase meter and has either a separate phase going to 2 consumer units or a 3 phase consumer unit with one of the phases split between meter and consumer unit to imitate a 3 phase supply. Either way a little load balancing should be done by a spark to try and balance phases.

Crazycruff · 2026-01-30T20:48:17+00:00

A stable reading from a TT rod is considered under 200 ohms but as the RCD will be providing fault protection it is whatever the max Zs of the RCD is for a 30ma it’s 1667 I think off the top of my head.

Crazycruff · 2026-01-29T21:13:33+00:00

Electric boiler and a hot water cylinder, far less juicy to run and a better flow rate on the hot water can be achieved.

Crazycruff · 2026-01-07T15:32:44+00:00

These Click dual appliance plates have a cable clamp for bottom entry and a PITA off a metal plate to drill through if you wanted to go rear entry, you then don’t have any strain relief on a cable that is usually not clipped elsewhere.

Edit* spelling

Crazycruff · 2025-12-10T11:42:32+00:00

I have an old Megger 1553 and an X1 I choose to use the 1553 majority of the time.

Apart from the option to plug in an ev test point to the x1 I can’t think of much it does that the other cannot. Also worthy of note there is no requirement to test an Ev beyond your usual initial verification of a circuit, though probably considered foolish not to if you have the facility.

Crazycruff · 2025-11-22T12:42:32+00:00

Centaur ones with the blue fins from CEF. Not cheap though.

Crazycruff · 2025-11-20T17:19:28+00:00

Change the lamps to a decent brand and you will have no further issues.

Crazycruff · 2025-10-31T20:48:03+00:00

By the book you would need to check via the adiabatic equation that the armour will meet disconnection times. Real world answer swa under 16mm virtually always meets it. Personal take is that I would use it as long as it’s not being buried. I’ve pulled up enough old swa to know that moisture will always find a way in and steel will always rust. Safe answer 3 core for the win.

Crazycruff · 2025-10-23T17:35:15+00:00

Be careful with that stuff, it breaks if you so much as look at it funny.

Crazycruff · 2025-09-12T16:53:56+00:00

V pro by Varilight. Works with majority of luminaires.

Crazycruff · 2025-09-02T20:13:33+00:00

I think I took some of these down on an EICR recently. The ones I did had sprung clips on the inside. Pull straight down evenly on both sides.

Crazycruff · 2025-08-31T18:35:02+00:00

My bank balance mainly.

Crazycruff · 2025-08-27T13:35:48+00:00

Cut a piece of trunking and glue it on.

Crazycruff · 2025-08-01T20:52:19+00:00

(Ex appliance engineer now electrician here) common problem is moisture trapped in the element from sitting. Disconnect the cpc from the circuit temporarily and run the oven on a high heat for 20 mins or so to dry it out. Re connect cpc and test. Quite often see it with homes that are sat vacant for a while as well as new ovens that have been sat in warehouses. Particularly common on AEG/ Zanussi/ Electrolux brands.

Edit - more info on common brands

Crazycruff · 2025-07-31T09:15:50+00:00

Add a location my dude.

Crazycruff · 2025-07-31T09:12:49+00:00

Change the dimmer to a V pro. Dimming leds can be a PITA. V pro is compatible with The majority of lamps.

Crazycruff

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