Advice for wiring oven and hob to single wire

jon1981

Hi,

I'm replacing a freestanding cooker with a separate oven and hob. I believe there is only one wire/electrical cable for the freestanding cooker. Is it possible to wire he oven and hob together and then wire the two into the existing point?

What should this cost me roughly as I'm presuming i'll need an Electrician to do it?

Jon

aido79

jon1981 wrote: »

Hi,

I'm replacing a freestanding cooker with a separate oven and hob. I believe there is only one wire/electrical cable for the freestanding cooker. Is it possible to wire he oven and hob together and then wire the two into the existing point?

What should this cost me roughly as I'm presuming i'll need an Electrician to do it?

Jon

It's possible to do this but isn't the correct way to do it. Is there a cooker switch there for the old cooker. This is a legal requirement. Do you know the cable size that is there at the moment and if it wil be big enough for the new hob? I think you should definitely get an electrician to have a look at this with the expectation that new cables will need to be run.

jon1981

thanks for replying.

There is a cooker switch there, it's my mothers house so i'm not there to check the type of cable. When you mention new cable being run, can this be split from existing junction or would this be running brand new cable through the walls from the switch board ?

aido79

jon1981 wrote: »

thanks for replying.

There is a cooker switch there, it's my mothers house so i'm not there to check the type of cable. When you mention new cable being run, can this be split from existing junction or would this be running brand new cable through the walls from the switch board ?

Brand new cable would be the best way to do it if possible.

jon1981

Hmm, will have to take a closer look at this, freestanding cooker might be the easier less expensive approach.

aido79

jon1981 wrote: »

Hmm, will have to take a closer look at this, freestanding cooker might be the easier less expensive approach.

It might be. You just need to make sure the old cable is big enough to handle the new cooker.

Calahonda52

aido79 wrote: »

It's possible to do this but isn't the correct way to do it. Is there a cooker switch there for the old cooker. This is a legal requirement. Do you know the cable size that is there at the moment and if it wil be big enough for the new hob? I think you should definitely get an electrician to have a look at this with the expectation that new cables will need to be run.

Just curious re "It's possible to do this but isn't the correct way to do it"
Whats the correct way to wire a elec hob and elec cooker: am aware of the need for the cooker switch and a big enough cable.
Thanks

aido79

Calahonda52 wrote: »

Just curious re "It's possible to do this but isn't the correct way to do it"
Whats the correct way to wire a elec hob and elec cooker: am aware of the need for the cooker switch and a big enough cable.
Thanks

The oven generally comes with a plug so a separate socket is usually wired for it.

Risteard81

aido79 wrote: »

The oven generally comes with a plug so a separate socket is usually wired for it.

Not necessarily. That depends on the load of the oven (the actual load and not the "total connected load" which can't necessarily be energised simultaneously).

ellewood

If theres 6sq cable from the isolation s/w why cant ya just wire this into a junction box and then from junction box to both oven and hob then?

ellewood

If theres 6sq cable from the isolation s/w why cant ya just wire this into a junction box and then from junction box to both oven and hob then?

ellewood

If theres 6sq cable from the isolation s/w why cant ya just wire this into a junction box and then from junction box to both oven and hob then?

jon1981

Actually, would something like this work? any drawback to this approach?

http://www.alertelectrical.com/prod/1022/click-45a-dual-cooker-outlet-plate-prw217#desc

jon1981

What do people make of the junction box idea attached above?

aido79

jon1981 wrote: »

What do people make of the junction box idea attached above?

It will work fine. I'm not really up to date with domestic regulations but can't see the difference between that kind of setup and a free standing cooker.

Risteard81

jon1981 wrote: »

What do people make of the junction box idea attached above?

It's not a junction box per se - it is a cooker connection unit, which is specifically designed for connecting cookers.

Hoagy

ET 101 page 306:

Annex 55A 3.3 Cooker circuits

b) Separate ovens and hobs

Where the oven and hob are separate appliances, a common supply and isolator may be used provided it is within 2m of each appliance.
In such cases, it should be ensured that each part of the circuit complies with the fault loop impedance value for the overcurrent device, e.g. 1.44 ohms max for a 32amp MCB

jon1981

Ok so my switch is 60 cm from where the cooker and job will be. Does this mean I cant use this one cable to power the hob and oven?

Edit: read that wrong, within in two metres. Ok so once the hob and oven dont exceed the impedence of the circuit then this is fine ?