Another cooker thread and which cable I'm afraid?

[HappyHippyDad]

Evening all..

The customer has a cooker supply from CU - cooker outlet plate all in 6mm.

The new oven is 7.9kW and will be on a 32A MCB.

The new oven is encapsulated in the shed at the moment so I cannot get to the maufacturers instructions.

With diversity applied the load will be 17.31A (no socket on the cooker switch).

I would normally use 6mm twin and earth for this but I have had 50m of 4mm H07 rubber flex for a couple of years now, bought specifically for ovens/hobs (as one set of manufacturers instructions stated this so I went and bought 50m!!) but I never use it as it just feels wrong for a 7.9kW load!!

We would happily use 4mm for a radial on a 32A MCB.

Would you guys be happy to use 4mm from outlet plate to cooker (assuming manufacturers instructions do not stipulate anything)?

Cheers..

 

[Leesparkykent]

What's the CCC of the 4mm flex?

 

[uksparks]

I've got a shed load of 4mm H07RN-F, got about 25m left
3 Core 4.0mm H0RN-F Rubber Flexible Cable (100m Coil)| MeteorElectrical.com

got it from Meteor a while ago, it's really good stuff, nice and chunky and very nice to terminate.

 

[uksparks]

I think you will find it says use 4mm cable, in my experience more often than not it does say 4mm.

 

[Marvo]

If it's 3-CORE 4MM HO7RNF it's probably rated to 35A so I would use it.

 

[davesparks]

Be careful with the current ratings of H07, they are often given for an 85C conductor operating temperature.

 

[NDG Elecs]

Get the 4mm in HHD. It would need some serious derating to be no good. I always use H07 for ovens - even if integrated.

Then Dave throws that in. ^^^^^^^^

Google the model for MI's mate.

 

[davesparks]

I can't see why you would go to the expense of H07 for a cooker connection when T&E is perfectly adequate?

 

[NDG Elecs]

I can't see why you would go to the expense of H07 for a cooker connection when T&E is perfectly adequate?

Personal preference, although I find H07 type cable is often stipulated. There is something about T&E left hanging down I just don't like.

 

[uksparks]

I looked at an oven yesterday funnily enough, there was no outlet plate and just a load of twin and Earth hanging out the wall, they are buying a new one so will fit a proper outlet and put flex on instead.

I i prefere flex as when you push the oven in, it tends to sit better and move out the way without kinking or damaging it.

 

[HappyHippyDad]

Cheers guys :smile5: