New 2.9kw oven connection

[Steve T]

Hi,
I've got a new built in oven that requires connection to electricity. The oven has a dedicated 32amp RCD protected circuit, with 6mm cable. The old oven was connected via a cooker connection unit with 6mm T&E.

The new oven has a power rating of 2.9kw, and comes with a 1.5mm flex attached, which has bare ends.

What would be the best way to connect this?

The manufacturers instructions offer no help whatsoever, I think because they are in different languages and not specific to the UK.
Thanks for any replies

 

[Steve T]

I assume from the O.P's profile that he is not an electrician, therefore, it would be less of a risk for him to connect the oven to an unswitched fused spur with flex outlet than mess around in a consumer unit.I know a few years ago Wylex changed their mcb's but the cat No. stayed the same the way you could tell according to their tech support was the colour of the din rail clip.

You are right, I am a diyer, but I do feel confident to do an MCB swap over. I would also prefer that option to having a 13A fuse running at close to its maximum for long periods of time.

 

[Toneyz]

There seems to be some debate on here if you can still get the MCB if you can and feel that you are competent to undertake this safely carry on, my advice would check the busbar clamps onto the MCB and connections are tight. I assume then you will connect oven via cooker outlet?

 

[Steve T]

Yes will make sure all the connections are tight and actually clamping the busbar. I was going to use a 20A flex outlet to connect the oven because I don't want to put the flex (with ferrules) and 6mm T&E into the same terminal, which I would have to do with a CCU.

 

[Toneyz]

Yes will make sure all the connections are tight and actually clamping the busbar. I was going to use a 20A flex outlet to connect the oven because I don't want to put the flex (with ferrules) and 6mm T&E into the same terminal, which I would have to do with a CCU.

Seems you've got it sorted then albeit getting the MCB. Good luck with it.

 

[Steve T]

Thanks, I will get a NHXB16 MCB, and see if it fits without forcing anything. At least according to TLC it should be a direct replacement for the NSB range. I will update once I've tried with that MCB.

 

[Toneyz]

Thanks, I will get a NHXB16 MCB, and see if it fits without forcing anything. At least according to TLC it should be a direct replacement for the NSB range. I will update once I've tried with that MCB.

Give Electrium/Wylex Technical a ring on Monday but ask them colour of din rail clip on back.

 

[buzzlightyear]

Thanks, I will get a NHXB16 MCB, and see if it fits without forcing anything. At least according to TLC it should be a direct replacement for the NSB range. I will update once I've tried with that MCB.

good luck with that .

 

[M-Ty]

It's an oven, so unlikely to cause an overload and it is therefore reasonable to omit overcurrent protection.
Is a short length of 1.5mm flex going to be protected against a short circuit fault by a 32-A MCB?
I think so, otherwise there would have been a lot of blown 1mm and 1.5mm cpcs on spurs from ring circuits in the days before RCDs, but I'll leave it to the proper electricians to discuss...

 

[Deleted member 9648]

Used Wylex NSB's are readily available on line.

 

[Steve T]

How will I be able to tell if it is one of the faulty ones?

 

[westward10]

How will I be able to tell if it is one of the faulty ones?

The new style NHX are compatible, if in doubt contact Wylex and they will confirm this.

 

[Midwest]

I agree with M-Ty in certain respects. The oven will have a fixed load, well almost. The manufacture has supplied the oven with suitably sized cable , with a suitable ccc for the max load. Why can't the OP just terminate the flex in the cooker outlet?

The MCB in the CU, has been designed and installed to protect the final circuit, not the appliance. As there is unlikely to be an overload, the 32A mcb will quite happily look after a short circuit.

Or is my thinking incorrect?

 

[buzzlightyear]

now who said they are the same.

 

[Steve T]

You are correct, it doesn't fit properly. Any ideas where I could source an NSB16 MCB that is definitely not one of the dodgy ones, or is it acceptable to use the NSB32 with a 20amp flex outlet plate and the 1.5 mm flex?

 

[Midwest]

My money is on the latter.

You have a 32A mcb, 6mm dedicated cooker radial, 45A isolation switch and a cooker connection unit?

I would connect the manufactures supplied flex into the connection unit. The appliances has a maximum fixed load (2900w approx. 12A), for which it has supplied a suitable sized flex 1.5mm (ccc 16A). The appliance does not require overload protection, and the 32A mcb will deal with any short circuit protection.