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What about making a thin wooden frame to board around the inside of the hole (and screwed to existing CLS timber) then screw the cut out plasterboard back into this frame? Stronger and quicker

What is the compound stuff and tape that the guy refers to?

Holes are big about 70cm wide x 60cm deep. Could I not line the rim of the plasterboard rectangles I cut out (which fit perfectly back into the hole) with adhesive/no more nails glue then 'shove' back in, afterwards sanding and repainting the join?

From a stud/partition wall I have cut out rectangles of plasterboard to access behind. These rectangles are about 60cm wide x 50cm long. CLS timber is only available to screw to on one of the four edges. What plasterboard adhesive/glue should I use to stick the cut-out plasterboard back to the...

I already have a 32A RCBO with 6mm2 going to a 45A DP switch. In theory that should be enough to power an electric hob. So I could use this second 32A RCBO with 10mm22 going to a second 45A DP switch just to power an oven So I could use the 1st 6mm2 32A cooker outlet to power an electric...

I used a Prysmian 6242Y Grey 10mm² Twin & Earth Cable. Says max operating temp is 70oC. My DP switch has no socket outlet That youtube video says "first 10A of rated current plus 30% of remainder" So say I use a 32A RCBO. Then if I use a 12 kW electric cooker (12,000W / 230V = 52.1 A. So...

Saw thanks. Ok so 10mm2 is plenty even with insulation. Future proofed at least in case I end up having to use an all electric cooker.

How do I apply the diversity rule of thumb to an all electric cooker? Say I use all 4 hobs (e.g. 5kw so 5,000W/230V = 21.7A ) about 30% of the time (21.7A x 30% = 6.5A and the oven (e.g. 5kw for arguments sake, 5so 21.7A) again 30% of the time (6.5A), so 6.5A+ 6.5A = 13A. Well below the 36A...

I ran another calculator, max allowed for 10mm2 with 100mm+ insulation is 36A. So a 36A all electric cooker is max allowed for that 45A DP switch, so about 8 kW.

I ran another calculator, max allowed for 10mm2 with 100mm+ insulation is 36A. So a 36A all electric cooker is max allowed for that 45A DP switch, so about 8 kW.

What temperature is a standard 10mm2 twin/earth rated to? Can't be far off

Yes, I meant thinnest cable so 10mm2. What's the most powerful all electric cooker running hob and stove all at once?

It's Reference Method 101 = Above a plasterboard ceiling covered by thermal insulation EXCEEDING 100mm. I ran, in that calculator (https://www.elandcables.com/cable-calculator), every installation method available and the thickest cable needed for 11m, multicore cable, 1 x 2 core cable...

10mm2 is the largest cable that will fit into a 45A DP cooker switch

12m long, all within insulation, 10mm2, B45 RCBO, 45A DP switch. Electric calculation (see JPEG) says 10mm2 for 45A is fine

Not 200kg more 40kg. Mineral wool over a large area

The 10mm2 cable goes behind the cooker and vertically down from the 45A DP socket so should be fine

To be clear there are no wall sockets in the coat cupboard, but there are 2.5mm2 x 4 cables going vertically upward. So clearly the backbox should not be directly in front of these vertical cables. I can put the backbox at a height of 0.45m to 1.2m (these are current regs for sockets). What...

Should the backbox be the same height as wall sockets?

Yep exactly just thought of that. Thanks! It's the labour (I would have to take down about 6 x plasterboard and pull about 200kg insulation out to then pull the 10mm2 cable through) - about a day's very dirty work - I hated it and would rather avoid. So a 1 gang back box (47mm) and a 1 gang...