Supplying Two Ovens

[Piratepete]

Hi Guys
A Happy, Healthy and Prosperous New Year to all of you.
Let the battle resume!

Customer has changed his mind. I was supplying a built in Double oven off a 6mmsq 32Amp protected radial and a built in microwave off a 13 Amp spur on the ring.

He now has two identical self cleaning ovens each requiring a 15 Amp supply. So no fused spur.

I know I'm permitted to connect the two ovens to one supply. My 6mm cable terminates in an isolator below the ovens. But the ovens (NEF) have 16Amp plug/socket connectors on them and are provided with their own dedicated flex and 16Amp connector. There is no way I can run 6mm into the ovens.

So I will have to reduce from 6mm to whatever size the flex is (looks like 1.5 mmsq).

Is this permitted?

If not, what do you suggest as a solution?

Cheers
Pete

 

[Rauer]

I know the leads ur on about and I thought they were a 2.5mm flex, I'd just take a 6mm out of ur isolator and join it in a junction box of some sort!

 

[Deleted member 26818]

Change the Neff flex to one that has a higher CCC, 2.5mm² or 4mm².

 

[Rauer]

You can't change it spinlondon as its like a kettle type lead

 

[Piratepete]

You can't change it spinlondon as its like a kettle type lead

So very true! The leads are long enough to reach the cooker switch (in cupboard below). It's the principle of doing this that bothers me a bit.
If there was a partial short circuit at the oven - the flex could get a bit warm!

 

[Rauer]

I always just connect them up into the switch if they reach as I don't see it as fixed wiring!

 

[Edd]

even though the flex as you say is small compared to the protection rateing,, i would connect them both up to the outlet plate. you will still be protected if a short type overload occurs, but as we can all see the flex per appliance is rated smaller than the over current protection. Ive brought this up with the NIC before and they seemed happy as in the circuit protective device will still operate duing a short type fault!!!! ( im just passing on what i was told)....

 

[PC Electrics]

No need to worry about the leads not being protected from overload by the MCB as the ovens are not capable of overloading their leads, therefore overload protection may be omitted. There is a reg, but don't know the number atm.

2.5 meets the adiabatic for 32A and 40A MCBs, so ok for earth faults.

 

[Engineer54]

Hi Guys
A Happy, Healthy and Prosperous New Year to all of you.
Let the battle resume!

Customer has changed his mind. I was supplying a built in Double oven off a 6mmsq 32Amp protected radial and a built in microwave off a 13 Amp spur on the ring.

He now has two identical self cleaning ovens each requiring a 15 Amp supply. So no fused spur.

I know I'm permitted to connect the two ovens to one supply. My 6mm cable terminates in an isolator below the ovens. But the ovens (NEF) have 16Amp plug/socket connectors on them and are provided with their own dedicated flex and 16Amp connector. There is no way I can run 6mm into the ovens.

So I will have to reduce from 6mm to whatever size the flex is (looks like 1.5 mmsq).

Is this permitted?

If not, what do you suggest as a solution?

Cheers
Pete

Are these DIN/VDE German type plug tops with scraping earth, your talking about?? If so they will not comply with our regulations they are un-polarised and require a DP MCB/RCBO. Maybe these cookers are what is known as ''Grey Goods'' as it's a EU rule that appliances should be fitted with a plug top (where provided) suitable for the country of sale, which they plainly are not. So i'd just chop them off and connect to your isolator. As others have stated no problem with overloading etc!!! Prudent to whip the oven cable cover off and have a quick look at the flex connections, just to check they are suitable for UK!!

 

[Piratepete]

Are these DIN/VDE German type plug tops with scraping earth, your talking about?? If so they will not comply with our regulations they are un-polarised

It's like a tower type pc. The cooker is supplied with a fixed 16Amp VDE male socket at the back, and a cable with a female plug to suit. It is polarised 3 pin and also locks in place.

Pete

 

[Engineer54]

It's like a tower type pc. The cooker is supplied with a fixed 16Amp VDE male socket at the back, and a cable with a female plug to suit. It is polarised 3 pin and also locks in place.

Pete

Then it's not a DIN/VDE socket then, probably a French style Euro socket that is very similar, but the socket on the cooker will have a round pin protruding that fit's into the female plug top. All DIN/Euro sockets are rated at 16A by the way...

It's Different, not seen that before!! lol!!

I'd still connect up the ends of your flex's to your isolator, as others and i have already stated...

 

[Rauer]

I'm fitting a Siemens one on Monday , will take a pic of the lead

 

[PC Electrics]

I'm fitting a Siemens one on Monday , will take a pic of the lead

yes please

 

[i=p/u]

id cut the end off too

 

[Rauer]

id cut the end off too

U won't be able to connect it up then tho