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Neff oven internal wiring colours.

I'm in the UK. I have replaced my old Neff oven with a new one which came without a lead and plug. The old one had 2 leads one of them blue attached inside to the neutral connector the live connecter had two leads attached inside, one brown and one white. The connectors were labeled appropiately N and L. The new Neff oven (2.4Kw) has no N or L labels. There is one blue and one lilac lead attached to one connector and two black leads attached to the other connector. It the connector with the black internal leads the Neutral?

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SOURCE: Neff oven internal wiring colours

red is positive and black is neutral normally on these ovens, dont recall seeing blue and lilac.

Posted on Jul 20, 2009

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The breaker could be changed from 30a to 20a. A 30amp breaker will run the unit but you will have less/no protection since the oven will pull 10 extra amps before it trips which could totally fry your oven depending on the failure.
Re-check the wording to see if it says 'minimum' 20amp breaker or if it indicates 20amp breaker only. If it's minimum 20amp I'd run it.
If it says 20amp only, I'd change the breaker. The existing wiring and outlet will be OK, if the plug-in is the same.
Get an electrician to change the breaker. You should really know what you are doing before you try it yourself.

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You can find the manual here:

D39F56S0GB/01

and here:
D39F56S0GB/02

It should come with a cable attached which should conform to standard wiring colour codes.

Red/Brown = Live/Feed
Black/Blue = Neutral/Return
Green/Green & Yellow = Earth

If the standard cable has been cut off there is a good chance it was for a reason and you shouldn't try to connect it without knowing how to determine which contact is for which (an electrician/electronics tech will know within seconds what should be connected where.)

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Hi, I have a Neff Double Oven (U1721N0GB/02). In the process of replacing the main oven element (which was clearly visibly faulty) I think I may have casued a short-sircuit / blown an in-line fuse. I have...


Did you replace the element from inside the oven cavity? If so, you may have knock off one of the spade connections whilst pulling the bracket through. Isolate from mains, remove back panel behind oven (not in the cavity) and check you don't have a wire floating about. The wires usually look quite similar but if you look closing they should have a black or red fleck in them, the element has two prongs on each side, you need to put the two the same colour on one side and the other single different colour on the other prong. If the fan is working then you have not blown the limiter that you will see quite close to the fan, but you might have blown the thermostat or the selector switch. If the red light comes on the fascia when you select the temp then it's pretty safe to assume the thermostat is ok. Hope this helps

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Yes, the installation instructions are correct. The wiring from your old oven isn't relevant.

Your query is a little confusing though. The new oven should have a power cable attached to it for connection to the mains supply. This should be on a separate circuit from your sockets and connected to an isolator switch. The wires in the power cable are colour coded to ensure that they are correctly polarised when connecting to the mains supply. I'm assuming you're in the UK as you list a GB model number, therefore, it should have a BROWN wire for LIVE, BLUE for NEUTRAL and GREEN/YELLOW for EARTH.

If your house wiring uses the old red (live) and black (neutral) colour coding, then you just need to ensure that the brown (live) wire from the oven lead is connected where the red wire from the supply is terminated. The blue (neutral) wire should be connected where the black wire is terminated and the green/yellow (earth) wire should be connected where the green wire is terminated.

Internally, the oven probably uses red cable for live and black for neutal, but you really shouldn't need to be doing anything with the internal wiring to install the oven.

You say you are having it fitted. Any competent installer would know (or check) the correct wiring order even if the instructions were missing. If you are installing it yourself, be sure are certain you understand what to do before attempting this and double-check the power for the oven circuit is off before you start.

Please rate this solution if you find it helpful. Thanks.

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You should be able to obtain a replacement door glas, they are usually supplied as a seperate item.
Try the following.

WWW.ESPARES.CO.UK/NEFF

WWW.NEFF.CO.UK/CONTACT.HTML

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1 Answer

Neff oven internal wiring colours


red is positive and black is neutral normally on these ovens, dont recall seeing blue and lilac.

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Electrical supply


HI Zuso,

Use your original wire and hook up Left to right Line Neutral, and Ground. L N G. Black wire is Line. Green wire is Ground. not sure what UK uses for Neutral. I just know that you need a big wire. And the voltage is supposed to be 220-240Volts.

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