Correct oven wiring

[Mazzyh]

Could someone please clarify if my oven wiring is correct as I’m a complete novice. 3.5kw fan oven on own circuit. Oven in fuse box says B32. There’s a dedicated oven switch on wall near oven. Underneath cooker is a double plug socket to which the to oven wire is plugged in. Is this correct for 3.5kw oven. The oven didn’t come with plug attached to oven wire.

 

[danechip]

No, It must be hard wired. A plug could not sustain a constant 3.5KW for very long, even with diversity, If it was meant to plugged in a socket in the UK it will 'almost always' come supplied with a plug fitted as standard.

 

[Mazzyh]

Can you explain why? Is there not enough power? Is the B32 oven in the fuse box correct for 3.5kw. And I thought oven connected with plug via double plug socket wired into wall switch that connects to B32 in the fuse was the equivalent of hardwired?

 

[danechip]

How many amps are required for a 3.5kw load?

The 32 Amps is enough 'power', but the plug has a maximum rating of 13 Amps, and a lot of cheaper imports struggle to run continuously at even 10 Amps.

You need a junction box.

 

[danechip]

Do you have four 4 wires on the end of this cable by any chance? An extra black instead of the usual three 3 brown, blue and green/yellow?

 

[bernardgreen]

The fuse in the plug heats up, the more current the hot it gets, too much current and it gets hot enough to melt the fuse wire. That is how fuses work.

Running a 13 amp fuse at 13 amps ( approx 3kW ) means the fuse will be quite hot which over time degrades the rest of the plug. This results in the plug being unable to safely carry 13 amps.

 

[JohnD]

You say there is a dedicated "oven" switch (they are more usually marked "cooker")

Can you post a photo of it please.

When you turn it off, does the socket you mention go dead?
Anything else?

Is there any other electrical fitting nearby, typically on the wall behind the cooker or beside it, or below the switch?

Have you got a separate hob?

 

[danechip]

I am imagining the previous set up was an single oven and mains powered sparkgap.

 

[JohnD]

I am imagining the previous set up was an single oven and mains powered sparkgap.

Yes, that possibility makes sense.

 

[AndyPRK]

this is what you would use to connect a big oven

https://www.ebay.co.uk/itm/45A-Cook...561752?hash=item3d9c510a18:g:YGQAAOSwkaNeMVnx

or

oven and elec hob (if 2 large output cables are required)

https://www.ebay.co.uk/itm/PRW217-4...511288&hash=item35f0cb7226:g:DZkAAOSw0JpV5btH


If you want to put a single socket next to it, this would be useful

https://www.ebay.co.uk/itm/Dual-1-G...964000?hash=item3ae53b2de0:g:W~4AAOSwpLNX~5Fp