8.8kw dual fuel oven cable diameter?

[Bobbybingham08]

Hi I have bought a rangemaster dual fuel oven which max load is 8.8kw. Think this is when everything is on at once. The instructions say 10mm max but I have a 6mm cable. Will the 6mm cable be ok ?

 

[stillp]

First, it's the cross-sectional area (specified in square millimetres)that matters, not the diameter. Second, the manufacturer has specified 10mm² for a reason.

 

[JohnD]

Hi I have bought a rangemaster dual fuel oven

I bet you haven't

I bet it's a dual fuel cooker.

I wouldn't be at all surprised if it has a gas hob. Mine does.

10mm max

And do they specify a minimum?

 

[ban-all-sheds]

Must have a heck of an array of ovens to add up to 8.8kW.

 

[stillp]

Whoops! I hadn't spotted the "max"!

 

[ban-all-sheds]

Second, the manufacturer has specified 10mm² for a reason.

He's specified 10mm² maximum - presumably because the terminals won't accommodate anything larger.

Anyway - 8.8kW. Even if we assume that's at 230V, that's 18.5A after diversity.

6mm² ought to be fine, but I guess due diligence on checking the rating of the protective device should be done....

 

[EFLImpudence]

10mm² is commonly used as a sub-main for a whole flat to supply everything.

8.8kW @ 240V is 37A - after diversity this is 18.1A so clearly 10mm² is overkill no matter what the manufacturer states.

 

[JohnD]

we need more information, but it's possible that this is a dual-fuel cooker. It might, for example, have a 2.5kW big oven and a 1.3kW little oven, and it might have four or five gas rings with an output totalling, let's say, 5kW

That's one way it could reach 8.8kW, but it would not all be electricity.

My dual-fuel cooker is somewhat like that. I have an idea the max electrical load (undiversified) is about 20A

This is only a guess. If it turns out not to be dual fuel, it will be very different.

 

[Bobbybingham08]

 

[Bobbybingham08]

The hobs are gas and yes it's a dual fuel range cooker. What type of person has all ovens and grill on at the same time ?

 

[JohnW2]

The hobs are gas and yes it's a dual fuel range cooker.

The specification you have posted indicates that the total 8.8kW electrical load includes hob. If you don't have an electric hob, then the figure will obviously be much less.

Are there just the two ~2.5kW ovens?

Kind Regards, John

 

[Bobbybingham08]

Two ovens and a separate grill. Why would they include the gas burner in the electrical bit ? Very misleading of RAngemaster. So a 6mm cable is fine then John ?

 

[Bobbybingham08]

 

[JohnW2]

Two ovens and a separate grill. Why would they include the gas burner in the electrical bit ? Very misleading of RAngemaster.

On reflection, I think that they have just perpetrated a typo, and should not have written 'including hob'. The 8.8kW looks as if it is probably the sum of "Multifunction", "Forced Air Convection" (presumably the two ovens?) and "Grill", which comes to 8.5kW, plus a (somewhat generous!) bit for lights and fan(s).

So a 6mm cable is fine then John ?

Indeed, as has been said, that should be fine, and 10mm² would be rather OTT.

Kind Regards, John

 

[rsgaz]

specification you have posted indicates that the total 8.8kW electrical load includes hob.

I think that's a mistake, an earlier manual revision maybe, it doesn't say that here...

https://www.manualslib.com/manual/7...onal-Deluxe-100-Dual-Fuel.html?page=34#manual

It says...

3.7kW Main Oven
2.5kW 2nd Oven
2.3kW Grill

Maximum total electrical load at 230 V (approximate total including oven lights, oven fan, etc.): 8.8 kW

So, 8.5kW. I don't quite see how two fans, 1 or 2 15w lamps and the LED display make up the other 0.3kW though!

Gaz