induction hob cable size

[leep82]

Ive been asked to install a new circuit for an induction hob. The customer doesnt have the appliance as of yet but after a little bit of searching i managed to find the technical info i was after. The total load is stated as 3.68kw, but it also states that there are 2 x burners rated at 1.4kw and 2 others rated at 1.8kw. Obviously adding the burners together gives me a rating much bigger than the 3.68kw stated. As the kitchen is due to be plastered this week i need to get my first fix done for this circuit and was just wondering whether to cover my arse with a cable big enough to take the load of the 4 x burners or whether a diversity factor has been applied and i should just work of the 3.68kw total load.

 

[i=p/u]

10kw /230= 44A . First 10+ 30%. 6mm is fine in my gfs eyes

 

[i=p/u]

You obv haven't a clue.. I take it you domestic installer with ambition

 

[leep82]

Thanks for your help

 

[leep82]

Although you havnt really helped have you, where do you get your 10kw from. Is this the 4 x burners added together with the 3.68kw total load? If so why isnt the total load stated as 10kw? All youve done is try to be cocky and completely missed my my point with your accusations, i can only assume you know everything with such an attitude.

 

[Badged01]

whether a diversity factor has been applied and i should just work of the 3.68kw total load.

By my calc assuming the full load is ~ 10kW @ 230V = 43A. With diversity = 10A + 30% (43 - 10) + 5A for a socket if fitted ~ 25A

I doubt whether 3.6Kw includes diversity as this equates to ~ 16A. The only thing I can think of is does the cooker allow you to run everything at once? Some limit the total load that can be applied at any one time so maybe thats what the 3.6kW refers to?

If in doubt give the manufacturer a tinkle ......

 

[Octopus]

Although you havnt really helped have you, where do you get your 10kw from. Is this the 4 x burners added together with the 3.68kw total load? If so why isnt the total load stated as 10kw? All youve done is try to be cocky and completely missed my my point with your accusations, i can only assume you know everything with such an attitude.

So what size cable are you going to put in then?

 

[leep82]

Although you havnt really helped have you, where do you get your 10kw from. Is this the 4 x burners added together with the 3.68kw total load? If so why isnt the total load stated as 10kw? All youve done is try to be cocky and completely missed my my point with your accusations, i can only assume you know everything with such an attitude.

So what size cable are you going to put in then?

Given my uncertainty over the total load and the fact that i have a little bit of cable on my van going spare going for 6mm2, after all what will do a lot will do a little. Its just about covering my arse as i initially stated and was after people opinions on whether they would also err on the side of caution, given the time restraints on the job. What i got was sombody questioning my ability and trying to teach me how to suck eggs.

 

[Octopus]

New dedicated hob circuit - 6mm, a good way to go. Some will say a bit ott but more flexible in the future

 

[HandySparks]

As above. The total rating of the four burners is 6.4kW, 27.8A. So with a 30A circuit, you'll sleep easy.

 

[leep82]

Thanks

 

[pepparz]

leep82. before you come on this site asking for help please understand that electricians are gods and anyone looking for help will be mocked for the egregious imbeciles they are.

 

[DPG]

10kw /230= 44A . First 10+ 30%. 6mm is fine in my gfs eyes

Where did the 10kW come from? Daz

 

[leep82]

The thing is pepparz i only wanted help with what i have interpreted as the total load. I am quite capable to work out the correct size of cable once known. People are to quick to jump on you on here, take the moron who was first to reply for example.

 

[pepparz]

leep82 I fully agree with you.

 

[GLENNSPARK]

Although you havnt really helped have you, where do you get your 10kw from. Is this the 4 x burners added together with the 3.68kw total load? If so why isnt the total load stated as 10kw? All youve done is try to be cocky and completely missed my my point with your accusations, i can only assume you know everything with such an attitude.

oh....

i can assure you he dont...lol..

 

[iamelectric]

the manufacturer has done the diversity calculation for tou and 3.68kw is about right

 

[leep82]

Thanks iamelectric i did wonder if this is the case. So in this thread alone i have a few different answers, so not as obvious as some people suggest. Theres even another thread started and i can only assume they are reffering to this thread of mine when they complain about people not knowing how to apply diversity! Now where do i say i dont know how to apply diversity?

 

[iamelectric]

lol just take it on the chin mate its just part of this forum , doesnt matter what you ask you will get all sorts of ---- off people , just go with it

 

[Sparkysoldman]

leep82. before you come on this site asking for help please understand that electricians are gods and anyone looking for help will be mocked for the egregious imbeciles they are.

never have so many been critisised by so few ..............


usually the same old gang !!!!!!!

 

[Geoffsd]

Don't burners use gas?

 

[Hawkmoon]

the manufacturer has done the diversity calculation for tou and 3.68kw is about right

If they have done this calculation for you they would need to stipulate that it is for 'normal' domestic use and presumably assume you have a socket outlet on your cooker switch?
Bear in mind the calculation of diversity allowance is the responsibility of the installer - not the manufacturer.

You could be installing this hob in a commercial kitchen.

 

[iamelectric]

lol see what a mean

 

[Octopus]

lol just take it on the chin mate its just part of this forum , doesnt matter what you ask you will get all sorts of ---- off people , just go with it

Sorry matey, can't agree with that. Just need to think about what you post, the more constructive the OP, then the more constructive the replies will be.

 

[leep82]

lol just take it on the chin mate its just part of this forum , doesnt matter what you ask you will get all sorts of ---- off people , just go with it

Sorry matey, can't agree with that. Just need to think about what you post, the more constructive the OP, then the more constructive the replies will be.

and the problem with my OP is what exactly?

 

[DPG]

Agree with Murdoch. There are a hell of a lot of good posts with sound advice given. Daz

 

[DPG]

and the problem with my OP is what exactly?

Without wanting to put words into Murdoch's mouth, I think he is replying to iamelectric's comment about it not mattering what you ask you will get ---- back. Daz

 

[Octopus]

Without wanting to put words into Murdoch's mouth, I think he is replying to iamelectric's comment about it not mattering what you ask you will get ---- back. Daz

Spot on DPG. Look at IAMELECTRIC's posts and you will see precisely what I mean.

 

[iamelectric]

^^^^ he loves me really!!!

 

[pepparz]

never have so many been critisised by so few ..............


usually the same old gang !!!!!!!

this is of course a sarcastic comment

 

[leep82]

For anyone interested went back to this job a week or so ago. Kitchen fitter had taken my outlet plate off and instead installed a single socket outlet as the hob came with plug top. The customer had decided to change the hob that they were having as the previous one couldnt be guaranteed before xmas. Its a little ott but they now have a 45a cooker switch controlling a single socket outlet wired in 6mm2

 

[Octopus]

For anyone interested went back to this job a week or so ago. Kitchen fitter had taken my outlet plate off and instead installed a single socket outlet as the hob came with plug top. The customer had decided to change the hob that they were having as the previous one couldnt be guaranteed before xmas. Its a little ott but they now have a 45a cooker switch controlling a single socket outlet wired in 6mm2

Nothing wrong with that

 

[leep82]

For anyone interested went back to this job a week or so ago. Kitchen fitter had taken my outlet plate off and instead installed a single socket outlet as the hob came with plug top. The customer had decided to change the hob that they were having as the previous one couldnt be guaranteed before xmas. Its a little ott but they now have a 45a cooker switch controlling a single socket outlet wired in 6mm2

Nothing wrong with that

i know, like you said not having the full information and being unable to read minds i was always going to err on the side of caution as stated in earlier posts. Obviously had i the information to begin with i wouldnt have designed it in such a fashion.

 

[Thefailsafe2012]

Kitchens are usually the number one room for changes, wire it once and no doubt they'll swap the gas hob for a ceramic, add under unit lights, move the sink, drop the ceiling, move the whole kitchen a foot to the right and sack off the fan oven for an aga.....

I hate kitchens! Haha :lol: