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 Post subject: Two single 2.3kwe ovens.
PostPosted: Fri Nov 25, 2011 2:24 pm 
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Hiya guys,

I've had a bit of alook round the forum and I can't see a question like this one - only questions where people insist on woring two single ovens into a double socket outlet - lol, despite everyones advice.

I've just bought my new house where there used to be a double electric range type oven. The Mrs would like the kitchen re vamping to include two single electric ovens at 2.3kw.

Now the question....

I know I should check but haven't yet - but considering the size of cooker that was there I'm assuming a meaty supply of at least 6mm (but hopefully 10mm) its wired to a usual cooker switch and cooker connection box below few from a 32A MCB in the dist board. Which is a fairly modern split load board with both halves RCD protected and alarm circuit on an RCBO. I think a 6mm is fine for the load its the correct method that bothers me.

Whats the correct way of connecting two ovens?
- Split the out from the isolator switch sort of a 'Y' config to two cooker connections?
- Connect both ovens into the same cooker connection
- And I fear this one is the correct one - run another circuit from the consumer, from its own MCB, another switch and cooker outlet

Sorry if this seems stupid, I'm used to big SWA's and ladder rack etc - left domestic stuff behind a long time ago lol.

Many Thanks in Advance,

Regards,

Dave


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PostPosted: Fri Nov 25, 2011 3:00 pm 
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heeelllooo and welcome Dave88291 :welcome: :welcome: :welcome:

no electrician but 4.6kw=20 amps with diversity expected load would be around 13 or 14 amps

are they hard wired or with plugs ??

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PostPosted: Fri Nov 25, 2011 3:05 pm 
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That's what I was thinking its ok on the load was just thinking of utilising existing cooker control for isolation etc. I don't actually know if they have a plug yet as they haven't arrived. But yea there's no real issue with using a socket outlet.


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PostPosted: Fri Nov 25, 2011 3:35 pm 
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The problem is what the manufacturer says is the max size you can supply to oven? With portable stuff if a fuse is required it has to be included in the appliance. However with fixed stuff the manufacturer can expect the installer to provide something to limit current draw.

Lucky in your case under the magic 3kW so using two fused connection units (FCU) will do the job. There are cooker connection units designed to take two cables but that will depend what the manufacturer says.

Personally I think to have individual local isolators is always a good move. Although very rare one would switch them off should a earth fault develop on one oven a double pole isolation would mean you can continue to use the other.

I have been surprised at built in ovens. One would expect the built in oven would be a higher spec than a stand alone cookers oven. However with the exception of those with steam function, the free standing oven seems to have an advantage. In the main I expect as not limited to same power as built in ovens. So my stand alone cooker has an oven with top, bottom and back (fan) heaters and the selector switch allows me to have more than one element running together. However my mothers built in oven is limited to 3kW so although she can select two elements they time share switching at a regular interval between them both.

As to if it's any good is another question. The cook books have only just caught up with the idea of a fan in the oven never mind all the different types of heating. Tried the door closed method of grilling bacon and it worked well. The pizza cooking was not so good though it seems should use top heat but found fan worked better.

Need a cooking course for how to use modern electric oven. My mother tells me her old solid fuel oven had dampers and she could control how it was heated. But no fan. So may be a very old cook book written before gas ovens took over.


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PostPosted: Fri Nov 25, 2011 4:56 pm 
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if you do decide that the are ok on a "normal"socket go for 2 separate sockets as a twin socket could overheat with a high load

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For this message the author big-all has received gratitude : OnlyMe
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PostPosted: Sat Nov 26, 2011 5:31 pm 
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big-all wrote:
if you do decide that the are ok on a "normal"socket go for 2 separate sockets as a twin socket could overheat with a high load



Although I would expect a double socket to supply 20A without a problem I have to agree that your post is very good advice and it is the way that I would consider installing the ovens.

Well said Big All.


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