Replacing electric cooker

[gmc83]

I've just got an electric cooker from a friend as my old one was past it. I've disconnected the old one from the wall and removed the wires. The old cooker had red, black and green/yellow wires, but the new one is blue, brown and green/yellow. Which ones need do I need to match up for the new cooker?

Thanks

 

[davy_owen_88]

Before I tell you the answer, tell me the rating for the cooker, the size of the cable from the consumer unit to the switch and the rating of the MCB that the cable is connected to. It is of great importance that you confirm that the cable and MCB are suitable for the load before you connect them up.

Davy

 

[gmc83]

Hi, i'm not at home at the moment as my internet is down. The new cooker is a Tricity Bendix SI302, if that helps.

Thanks

 

[davy_owen_88]

Well the manual says: 9.8kW @ 230V / 10.7kW @ 240V but until you can give the answers to the above questions there's not much useful info I can give.

Assuming the cable and MCB is suitable for the load you'll need to connect:

red - brown
black - blue
g&y - g&y

Davy

 

[streetlighter]

Brown is Live, Blue neutral and Green/Yellow the earth wire.
J

 

[gmc83]

Hi, thanks for the replies, i'll post again tomorrow.

Thanks

 

[gmc83]

The MCB is rated at 30 amps, I think the cable is 4mm.

I take it i'll need to upgrade the MCB as its higher than 7.2kw?

 

[davy_owen_88]

10700w / 240v = 45A

10A + 30% + 5A = 25.5A diversified load.

How far from the consumer unit is the cooker? I hope the cable is clipped direct to the wall? You won't need to upgrade the MCB but you might need to upgrade the cable.

Davy

 

[gmc83]

Hi, it's quite close. Most likely under 5 metres, its a small 1 bed flat.

I'm not sure what you mean by 'clipped direct to the wall'

Thanks for your responses.

Gerard

 

[gmc83]

How do you work out the diversified load?

 

[davy_owen_88]

How do you work out the diversified load?

Work out the current:

10700w / 240v = 45A

Diversity for cookers is:

10A + 30% of what's left + 5A if you have a socket on the cooker switch.

In your case it was:

10A + 10.5A + 5A = 25.5A or 20.5A without a socket.


Davy

 

[davy_owen_88]

I'm not sure what you mean by 'clipped direct to the wall'

If you have 4mm^2 cable on a 32A MCB for the cable to be able to safely carry 32A it needs to either be clipped directly to the wall, or embedded in plaster.

 

[gmc83]

Hi Davy,

Thanks for the advice, there is a socket on the cooker switch so the 30amp will be good.

The wire is clipped into the wall

Cheers

Gerard