Cable on new replacement oven

[Jupiter01]

I am replacing a oven under a gas hob (cut into the worktop). I purchased an oven which requires a 13 Amp (Requires hardwiring to a fused spur) connection.

The old oven was connected into a cooker switch via a 6mm T&E cable.

I didn’t realise that the new oven doesn’t come with a new cable and instead, used some 2.5mm T&E cable that I had. Is this adequate?

Thanks in advance

 

[sxturbo]

That's fine as long as you have a 13mm fuse between the cooker and the 6mm old cooker connection

 

[terryplumb]

Are you wiring 2.5mm² from oven to a fused connection unit ?

 

[sparkwright]

2.5mm2 T+E isn't really suitable, because it's not flexible enough.

All the cores are solid, it just hasn't got the flexibility.

That said, it was always the norm to use 6.0mm2 T+E to go straight into an oven, the cores of this are stranded - though not the earth for the last 50 or 60 years.

 

[Jupiter01]

The 2.5mm isn’t flexible but it seems to have fitted ok and tucked behind the oven.
Also, I didn’t notice any fuse in place. There’s a cooker switch above the worktop and this feeds a connection point (no fuse) behind the oven and I have wired my 2.5mm cable straight into here - in the way the 6mm cable was connected.

 

[terryplumb]

It's a lot more pliable than 6 mm !!
Heat resistant flex would be better ,but I doubt you will have any issue with T&E. Its not as though the oven gets moved very often.

 

[EFLImpudence]

But you said:

I purchased an oven which requires a 13 Amp (Requires hardwiring to a fused spur) connection.

 

[Jupiter01]

But you said:

Just realised that I hardwired it into the connection point but there is no discernible fuse.

 

[sparkwright]

If you have a 'connection point', easiest thing may be to replace that with a 13amp unswitched fused connection unit, and from there use some 1.5mm2 3core heat resistant flex.

 

[Jupiter01]

Should the previous oven have had a fuse too?
Also, is the size of the MCB significant?

 

[sxturbo]

Should the previous oven have had a fuse too?
Also, is the size of the MCB significant?

The old one was probably sufficient large enough that it's power draw was too large for a fuse connection so the protection was at the RCD

You need a fuse now as the oven doesn't draw enough power so should it fail it will have no protection and is a safety issue.

 

[sparkwright]

Previous oven probably only needed the MCB.

The size of the MCB is not really significant, as at a guess it something like 32 amp.

Fitting the unswitched fused connection unit would be easier than finding and fitting a smaller MCB, and will satisfy the manufacturers instructions if we care, and also allow you use 1.5mm2 flex, which is possibly easier to obtain than 2.5mm2 flex (for a DIYer at least).

 

[Jupiter01]

Can I replace this with a switch/socket that is fused to save me pulling out the oven again?

 

[sxturbo]

yes, as long as the fuse is 13amp

 

[Taylortwocities]

Providing that you dont mind a length of cable permanently plugged in to the socket.

Easier to put a fused connection unit in. This is (after all) what the instructions require

Changing to a double socket is a lot of effort just to save you

pulling out the oven again

.