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

 

[buzzlightyear]

what make of oven is it .

 

[Deleted member 9648]

Change the cooker connection outlet to a 13a flex outlet plate and replace the 32a mcb with a 16a.

 

[buzzlightyear]

is there a gas hob or electric .

 

[Deleted member 9648]

He said it's a dedicated circuit for the oven.

 

[Leesparkykent]

The make and model would be handy?

 

[Steve T]

It's an AEG KEK442910M

 

[Steve T]

If I need to replace the MCB, the MCBs I have are Wylex NSB ones, which don't appear to be available any longer, so would the new NHX ones be suitable?

 

[westward10]

If I need to replace the MCB, the MCBs I have are Wylex NSB ones, which don't appear to be available any longer, so would the new NHX ones be suitable?

Yes they are compatible.

 

[buzzlightyear]

If I need to replace the MCB, the MCBs I have are Wylex NSB ones, which don't appear to be available any longer, so would the new NHX ones be

no ,not compatible

 

[Timbo]

no ,not compatible

TLC beg to differ:
MCB's & RCBO's - Wylex NSB6 mcb 3 6 10 16 20 32 40 45 50 amp miniature circuit breaker - https://www.tlc-direct.co.uk/Manufacturers/Wylex/Wylex_Ns_2/index.html
Wylex NHXB - MCB's ( Type B )
Direct replacement for Wylex NSB MCB's
General Domestic Consumer Unit use

 

[Timbo]

no ,not compatible

TLC beg to differ:
MCB's & RCBO's - Wylex NSB6 mcb 3 6 10 16 20 32 40 45 50 amp miniature circuit breaker - https://www.tlc-direct.co.uk/Manufacturers/Wylex/Wylex_Ns_2/index.html
Wylex NHXB - MCB's ( Type B )
Direct replacement for Wylex NSB MCB's
General Domestic Consumer Unit use

 

[buzzlightyear]

LC beg to differ:
MCB's & RCBO's - Wylex NSB6 mcb 3 6 10 16 20 32 40 45 50 amp miniature circuit breaker - https://www.tlc-direct.co.uk/Manufacturers/Wylex/Wylex_Ns_2/index.html
Wylex NHXB - MCB's ( Type B )
Direct replacement for Wylex NSB MCB's
General Domestic Consumer Unit use

tried one have you!

 

[buzzlightyear]

will not sit in the consumer correctly ,with NSB mcbs.

 

[Toneyz]

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.

 

[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.

 

[Steve T]

Yes that's right, 32amp MCB, 6mm and cooker switch.
Would it be acceptable to use the 20amp flex outlet plate with the 32amp MCB? I'd prefer doing this as there are separate terminals for the flex and T&E, instead of a single terminal for both on the CCU.

 

[benji]

WYLEX MCB - NSB16 16 Amp SP MCB
Brand new

• £3.95
• Free Postage
  See more like this
  on ebay

 

[Deleted member 9648]

I'd not disagree with leaving it connected to the existing setup, no issue with that.However given the small cost and limited effort I'd replace the 32a mcb for a 16 as a preference but not a necessity.

 

[Steve T]

Ok, would it be acceptable to use the 20amp flex outlet on the 32amp MCB?

 

[Midwest]

Ok, would it be acceptable to use the 20amp flex outlet on the 32amp MCB?

Do you not have one of these;

Terminating 6mm, might be problematic in a 20A flex outlet plate?

 

[telectrix]

Ok, would it be acceptable to use the 20amp flex outlet on the 32amp MCB?

yes as middy's post #30

 

[Midwest]

I'd not disagree with leaving it connected to the existing setup, no issue with that.However given the small cost and limited effort I'd replace the 32a mcb for a 16 as a preference but not a necessity.

I don't understand why though?

 

[Steve T]

Yes there was a CCU in place, with 2x6mm connected to it. 6mm does fit easily into the 20amp flex outlet, and I'd prefer it if it is acceptable as there are separate terminals for the flex and T&E.

 

[Midwest]

Yes there was a CCU in place, with 2x6mm connected to it. 6mm does fit easily into the 20amp flex outlet, and I'd prefer it if it is acceptable as there are separate terminals for the flex and T&E.

You could use one of these, its for connecting two appliances, but you could use it in your case, although most use a CCU for one appliance no probs;

45 Amp Dual Appliance / Cooker Outlet Plate - https://www.tlc-direct.co.uk/Products/AA45DCOP.html?source=adwords&ad_position=1o5&ad_id=45425533757&placement=&kw=&network=g&matchtype=&ad_type=pla&product_id=AA45DCOP&product_partition_id=174048872227&test=finalurl_v2&gclid=Cj0KCQiA-ebSBRC8ARIsAGuxJIqOA-szO9na8yrai5EJEuFqK2xRH7yxYRHrTsVsKpk8DzqG3GxzH6oaAkFjEALw_wcB

 

[Steve T]

Ok so I shouldn't use the 20amp flex outlet?

 

[Midwest]

Its up to you, I'm getting bit lost now. You had a conventional ccu, but want to use a flex outlet. Whats wrong with the old ccu?

 

[telectrix]

Its up to you, I'm getting bit lost now. You had a conventional ccu, but want to use a flex outlet. Whats wrong with the old ccu?

think he's concerned about getting 1.5mm flex to make a good connection in terminals designed for 6.0mm/10.0mm 7 strand.

whatever... if he don't get a shift on, dinner will be salad.

 

[Steve T]

Sorry for confusion, reason I did not want to use the CCU was because I would have to put the flex, and 6mm T&E into the same terminals, which doesn't give a very good connection. Hence why I'd prefer the 20 amp flex outlet.

 

[westward10]

now who said they are the same.

View attachment 40238

View attachment 40239

That in an interesting comparison Buzz because I have fitted these into NSB boards with no fiddling so perhaps I am mistaken.

 

[Midwest]

I expect there are thousands of electric cookers connected up, using the flex & 6mm T&E combo, with no issues. You could get some boot lace ferrules if its gonna give you sleepless nights, or go with your flex outlet.

 

[Steve T]

Think I'll just go with the flex outlet, 20amps rating should be more than sufficient

 

[Steve T]

That in an interesting comparison Buzz because I have fitted these into NSB boards with no fiddling so perhaps I am mistaken.

They do fit without fiddling, but they don't actually clip onto the DIN rail, even though they seem to.

 

[Deleted member 9648]

I'd not disagree with leaving it connected to the existing setup, no issue with that.However given the small cost and limited effort I'd replace the 32a mcb for a 16 as a preference but not a necessity.

I don't understand why though?

Simply because I prefer the protective device to be the nearest rating to the load. You'll often find appliance manufactures specify fuse ratings for their appliances as well, and despite the OCPD being there to protect the cable their instructions have precedence.

 

[Deleted member 9648]

Just to add to that, the infamous 3a fuse debacle for small domestic fans is a prime example of getting caught out by failing to follow manufacturers instruction.

 

[Toneyz]

This post is going around in circles since I posted last.cooker outlet/20A flex outlet. Just wait until Monday and you will know 100% from Electrium/Wylex.If you can't buy a new replacement there are online places that do discontinued MCB's if on ebay just watch out for fakes.