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Topic Title: Cooker cable capacity
Topic Summary: Description in manual confusing- says mains in=3 x 2.5mm
Created On: 23 February 2013 03:42 PM
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 23 February 2013 03:42 PM
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Avatar for gel.
gel

Posts: 192
Joined: 13 February 2005

Changing my integral double oven, I find new cooker terminals do not have clamps under "screw" heads, and finding it impossible to get good grip on cables.

Cooker spec says main in cable should be 3 x "2.5mm"- not quite sure what that means, apart from totalling 7.5mm; is a Baumatic double oven.

My current 6mm cable is stranded not solid; if changed for solid
I'd imagine still very difficult to retain cable under screw heads.

Any suggestions valued?

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Gel__Big Brother is here
 23 February 2013 03:58 PM
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daveparry1

Posts: 6328
Joined: 04 July 2007

I think they are referring to each conductor, ie L N E all of 2.5mm csa. If you can't make a satisfactory connection by splitting the cores of the 6mm and putting 3 cores on one side of the screw and 4 on the other use a cooker outlet plate or a junction box to convert the 6mm t/e into 2.5 mm flex. Are you sure those instructions are for single phase supplies? sometimes they give two sets of instructions, 2.5mm for 400v 3 phase supplies and 4mm for 230v single phase with link plates to be fitted in their terminal block,


Dave.
 23 February 2013 04:10 PM
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sparkingchip

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Is there one live terminal or three? There could be the option to make a three phase electrical supply option, in which case there may be some little brass links packed some where, normally in the terminal box held in a moulded section of the box or in the terminals themselves, these links can be used to link three live terminals if that is what you have to allow a single phase connection.

Andy
 23 February 2013 06:10 PM
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Avatar for gel.
gel

Posts: 192
Joined: 13 February 2005

Thanks all; space under & around screw head in it's plastic shroud very limited.

It's a Euro spec oven I believe as allows for 230v single phase, or 400/230 2 phase via some bridging adjustments.

I found T4 the recommened for Neutral would not tighten; therefore as the other N terminal 5, is bridged to it, ran N to 5.

However, though upper oven works, fan oven below is dead.
I'm wondering if it's because I didn't use one nominated, or perhaps because bridge plate on T4 can't be properly tightened.
Tks,

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Gel__Big Brother is here
 23 February 2013 07:09 PM
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Cremeegg

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If things don't tighten then get the suppliers to send you an item that is fit for purpose and ask them for some decent instructions.

I seem to recall that manufacturers are required to supply decent instructions in some bit of obscure consumer law.
 23 February 2013 07:49 PM
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Avatar for gel.
gel

Posts: 192
Joined: 13 February 2005

The instructions are decent as is adjacent wiring guide label on cooker; however, connecting cable strands to cooker is taken as red.
eg all terminal screws must be tightened securely.

That would be easy, if it wasn't for the cable starnds!!

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Gel__Big Brother is here
 23 February 2013 08:33 PM
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aligarjon

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Sounds like it might be designed for a 2.5mm flex ?
what is its rating ?


Gary

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Specialised Subject. The Bleedin Obvious. John Cleese
 23 February 2013 09:48 PM
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Avatar for gel.
gel

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Here we go:

Rated Voltage: 220-240 Vac 50 Hz
Max Rated Inputs: 5.60 kW
Mains Supply Lead 3 x 2.5 mm² (not supplied)

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Gel__Big Brother is here
 23 February 2013 09:53 PM
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Avatar for Martynduerden.
Martynduerden

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Originally posted by: gel

Here we go:



Rated Voltage: 220-240 Vac 50 Hz

Max Rated Inputs: 5.60 kW

Mains Supply Lead 3 x 2.5 mm² (not supplied)


Remove the screws crimp terminals on stranded cables place screw through terminal tighten up. Bingo

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Regards

Martyn.

Only a mediocre person is always at their best



www.electrical contractors uk.com
 23 February 2013 11:52 PM
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ectophile

Posts: 546
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To me, that reads that the oven is intended to be wired using a 3-core 2.5mm cable. Without any further information, I would expect that to be 2.5mm heat-resistant flex.

So the problem is that you are trying to jam a 6mm cable into a terminal meant for 2.5mm.

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S P Barker BSc PhD MIET
 24 February 2013 08:43 AM
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aligarjon

Posts: 2898
Joined: 09 September 2005

seems to be quite common these days, imported cookers requiring a non-standard ( well i don't carry 2.5mm 3core hr flex) flex or cable connection that would have cost them peanuts to have fitted in the overall cost of the cooker. I had to source some 6mm 5core flex a while back for a 3 phase cooker, an absolute pain in the backside and cost a fortune.


Gary

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Specialised Subject. The Bleedin Obvious. John Cleese
 24 February 2013 02:28 PM
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Avatar for gel.
gel

Posts: 192
Joined: 13 February 2005

As suggested 2.5mm cable seems to be the fix.

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Gel__Big Brother is here
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