Connecting a hob

[chrissysmagicbo]

hi i would just like to know about this... have a hob which requires a cable of 4mm to hardwire to cooker switch. the fuse at board is 30amp and the shut off near the cooker is a 45amp. as i cannot find a 30amp switch. my question is, i have no idea what amp or size the original cable is although it has its own circuit, which comes from the main fuse box, is it ok to use a different size wire ie 4mm and yet the original house wiring is, say 6mm. my real question is can i use 4mm for the hob as i have no idea what cable is used coming from the main switchboard. does it matter if i use 4mm wire as suggested in the manual? hope you can understand my question, thanks for any help, chris

 

[malcolmsanford]

Yes there is no problem with you using 4mm cable for that.

You will though need to keep it below 3 metres in length.

 

[telectrix]

for the price difference you may as well use 6mm.

 

[chrissysmagicbo]

hi thanks for your help, well as the maker specifys H05 RRF 3 CORE X 4MM i will use it as stated. the set up previously was a cooker switch with a socket. the standalone cooker was hardwired into cooker switch but had a spur which went on to a double socket which had small appliances ie kettle. as this was a radial circuit??? i removed the spur. so now have just a cooker switch with socket. the oven is single with a plug and the ceramic hob is the one that must be hardwired into it. the hob is 6kw. and i have a seperate fused cooker switch that turns off the hob and oven.the hob is about 1 meter away from switch. i gather this is all in order? chris

 

[Des 56]

hi thanks for your help, well as the maker specifys H05 RRF 3 CORE X 4MM i will use it as stated. the set up previously was a cooker switch with a socket. the standalone cooker was hardwired into cooker switch but had a spur which went on to a double socket which had small appliances ie kettle. as this was a radial circuit??? i removed the spur. so now have just a cooker switch with socket. the oven is single with a plug and the ceramic hob is the one that must be hardwired into it. the hob is 6kw. and i have a seperate fused cooker switch that turns off the hob and oven.the hob is about 1 meter away from switch. i gather this is all in order? chris

Are you suggesting fused as ,"at the consumer unit",or local ?

 

[chrissysmagicbo]

I mean there is a fuse just for this supply on fuse box of course and also a fuse in the cooker switch which is about a meter away from hob and cooker. hope this is what you are asking. please ask away if you dont understand i know i dont explain myself very well. so cable comes into kitchen from fuse board that is where i have the fused cooker switch. then i have a cable which comes from the fused cooker switch and ends at the original "cooker switch with a socket" which is accessable. the oven is plugged into this and i will hardwire the hob into it. i thought that it would be better to have a fused cooker switch which i can turn off after use. previously the cable went straight into the cooker switch which wasnt fused and also had spur running from it. thanks chris

 

[Engineer54]

Do they make a fused cooker connection switch?? Can't say that i've ever seen one!!

 

[malcolmsanford]

The fused cooker switch seems to be a bit of a strange animal

It's not something like this is it

 

[chrissysmagicbo]

hi yes thats it. thought it would be best as i can switch off at night. is it ok? chris

 

[Guitarist]

I think he is saying that the 6mm goes through an old single-way 30A switched/fused isolator before going to the cooker switch plate.

 

[Guitarist]

Chrissy, I hope you are not feeding your 30A cooker supply through a 13A SFU as in the photo above....

 

[malcolmsanford]

I mean there is a fuse just for this supply on fuse box of course and also a fuse in the cooker switch which is about a meter away from hob and cooker. hope this is what you are asking. please ask away if you dont understand i know i dont explain myself very well.

so cable comes into kitchen from fuse board that is where i have the fused cooker switch. That is the picture I posted I guess Chris

then i have a cable which comes from the fused cooker switch and ends at the original "cooker switch with a socket" which is accessable.So from the swich you go into a cooker switch

the oven is plugged into this and i will hardwire the hob into it.That mate is where if I read everything right we have to stop, as you can't do that.

i thought that it would be better to have a fused cooker switch which i can turn off after use. previously the cable went straight into the cooker switch which wasnt fused and also had spur running from it. thanks chris

I can only advise now Chris that you may have things slightly confused, and it is difficult to explain things on a forum I agree. But the very fact that your confusing things, and may be telling us what you are is because really the work is a little beyond you.

I can only advise for safety sake you ask for help. post your general location and i'm sure one of the lads could come round and give you a quote for the work you need done

 

[chrissysmagicbo]

hi yes its a double pole 45amp switched fused isolator which in turn goes to a cooker switch with socket. it ends there. a separate circuit is it ok? chris

 

[chrissysmagicbo]

well would it be better to just have hob running to cooker switch and plug oven into an ordinary socket ?

 

[trev]

If the oven is 2kw+ it's reccommended to be on a dedicated radial mate